Researcher Database

TSUZUKI, Shinji

FacultyGraduate School of Science and Engineering Electrical and Electronic Engineering and Computer Science
PositionAssociate Professor
Last Updated :2019/08/19

Researcher Profile and Settings

Profile and Settings

Name

  • Name

    TSUZUKI, Shinji

Affiliations

Affiliation & Job

  • Section

    Graduate School of Science and Engineering Electrical and Electronic Engineering and Computer Science
  • Job title

    Associate Professor

Education, Etc.

Education

  • 19850000
  • 19830000
  • 19850000, Ehime University, Graduate School, Division of Engineering
  • 19830000, Ehime University, Faculty of Engineering

その他基本情報

Association Memberships

  • He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan)
  • SITA(The Society of Information Theory and its Applications, Japan)
  • ITE(The Institute of Image Information and Television Engineers, Japan)
  • and IEEE.

Committee Memberships

  • 20190600, 99990000
  • 20100500, 99990000
  • 20170600, 20190400
  • 20010500, 20201200
  • 20171100, 20171100
  • 20141000, 20170900
  • 20160400, 20170300
  • 20160400, 20170300
  • 20160400, 20170300
  • 20160400, 20170300
  • 20160400, 20170300
  • 20160400, 20170300
  • 20170100, 20170100
  • 20161100, 20161100
  • 20151100, 20151100
  • 20110000, 20130000
  • 20110000, 20120000
  • 20110000, 20110000
  • 20100000, 20110000
  • 20100000, 20100000
  • 20090000, 20100000
  • 20070000, 20090000
  • 20080000, 20080000
  • 20080000, 20080000
  • 20070000, 20080000
  • 20070000, 20080000
  • 20050000, 20060000
  • 20040000, 20060000
  • 20040300, 20040600
  • 20030000, 20040000
  • 19970000, 19970000
  • 20100000, 20110000, He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE., He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE.
  • 20010000, 20110000, He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE., He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE.
  • 20080000, 20080000, He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE., He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE.
  • 20080000, 20080000, He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE., He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE.
  • 20070000, 20080000, He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE., He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE.
  • 20070000, 20080000, He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE., He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE.
  • 20050000, 20060000, He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE., He is a member of IEICE (The Institute of Electronics Information and Communication Engineers, Japan), SITA(The Society of Information Theory and its Applications, Japan), ITE(The Institute of Image Information and Television Engineers, Japan), and IEEE.

Research Activities

Research Areas, Etc.

Research Interests

  • Research on sequence design and signal processing for baseband spread-spectrum communications
  • and its application to power-line communication Digital Video (DV) Transmission System over IP Network Analysis of CDMA based protocols Smart Grid

Book, papers, etc

Published Papers

  • Propagation Characteristics of Hoist Ropes for Mobile-Crane PLC, Shinji Tsuzuki ; Yoshio Yamada, 2017 IEEE INTERNATIONAL SYMPOSIUM ON POWER LINE COMMUNICATIONS AND ITS APPLICATIONS (ISPLC), 20170400, [Refereed], 10.1109/ISPLC.2017.7897100
  • RELATION BETWEEN SOLAR RADIATION DISTRIBUTION BY USING SOLAR PANEL AND CLOUD DISTRIBUTION OF WHOLE SKY CAMERA, 藤森祥文, SWEATA Sijapati, 都築伸二, 森脇亮, Annual journal of Hydraulic Engineering, JSCE, 20170300, 2185-467X, 10.2208/jscejhe.73.I_475
  • 太陽光パネルによる日射量モニタリング手法の雲分布観測への適用, 藤森祥文, 都築伸二, 森脇亮, 太陽/風力エネルギー講演論文集, 20161100
  • Propagation Characteristics of a DC Biased Line for Hydraulic-Crane PLC, Shinji Tsuzuki and Yoshio Yamada, IEEE-ISPLC, Bottrop, Germany, 20160300, [Refereed], 10.1109/ISPLC.2016.7476264
  • kHz帯PLC用N‐PE伝送方式の適用可能性に関する検討, 都築伸二, 吉澤幸晃, 山田芳郎, 電子情報通信学会論文誌 B(Web), 20150600, [Refereed], 1881-0209
  • Feasibility study of ubiquitous sensor networks by inductively coupled PLC over PV power systems, Shinji Tsuzuki, Yoshio Yamada, 2015 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC 2015, 20150300, [Refereed], 10.1109/ISPLC.2015.7147627
  • ESTIMATION OF GLOBAL SOLAR RADIATION USING PHOTOVOLTAIC GENERATION, 森脇亮, 都築伸二, 宮尾渉, 笹方裕平, 梶房開, 土木学会論文集 B1(水工学), 20150200, [Refereed], 2185-467X, 10.2208/jscejhe.71.I_421
  • One wire PLC system for inter-floor connectivity, Shinji Tsuzuki, Hiroyuki Utsunomiya, Yoshio Yamada, IEEE ISPLC 2014 - 18th IEEE International Symposium on Power Line Communications and Its Applications, 20140300, [Refereed], 10.1109/ISPLC.2014.6812331
  • Radiation detection by employing periodic packets in power-line communication system, Intan Sari Areni, Intan Sari Areni, Shinji Tsuzuki, Yoshio Yamada, IEEJ Transactions on Electronics, Information and Systems, 20131201, 03854221, 10.1541/ieejeiss.133.2184
  • N-PE transmission system for Narrow-Band PLC and its channel properties, Intan Sari Areni, Intan Sari Areni, Shinji Tsuzuki, Yukiaki Yoshizawa, Yoshio Yamada, ISPLC 2013 - 2013 IEEE 17th International Symposium on Power Line Communications and Its Applications, Proceedings, 20130801, [Refereed], 10.1109/ISPLC.2013.6525843
  • Packet size optimization of PPS based radiation detection for AEE-PLC, Intan Sari Areni, Shinji Tsuzuki, Yoshio Yamada, 2012 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC 2012, 20120613, 10.1109/ISPLC.2012.6201313
  • A feasibility study of 1Gbps PLC system assuming a high-balanced DC power-line channel, Shinji Tsuzuki, Intan Sari Areni, Yoshio Yamada, 2012 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC 2012, 20120613, 10.1109/ISPLC.2012.6201334
  • N-PE transmission system for Narrow-Band PLC., Shinji Tsuzuki,Yukiaki Yoshizawa,Intan Sari Areni,Yoshio Yamada, Proceedings of the International Symposium on Information Theory and its Applications, ISITA 2012, Honolulu, HI, USA, October 28-31, 2012, 20120000, [Refereed]
  • Radiation detection and mode selection for a cognitive PLC system, Shinji Tsuzuki, Shinpei Tatsuno, Intan Sari Areni, Yoshio Yamada, 2011 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC 2011, 20110530, 10.1109/ISPLC.2011.5764416
  • A study of radiation detection methods for cognitive PLC system, Intan Sari Areni, Shinji Tsuzuki, Yoshio Yamada, 2011 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC 2011, 20110530, 10.1109/ISPLC.2011.5764436
  • Attenuation characteristic modeling of power-line channel in cargo ships, Shinji Tsuzuki, Seiichiro Ishii, Jun Nishioka, Yoshio Yamada, IEEJ Transactions on Electronics, Information and Systems, 20100928, 03854221, 10.1541/ieejeiss.130.1337
  • Attenuation Characteristic Modeling of Power-line Channel in Cargo Ships, TSUZUKI Shinji, ISHII Seiichiro, NISHIOKA Jun, YAMADA Yoshio, IEEJ Transactions on Electronics, Information and Systems, 電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society, 20100801, 03854221, 10.1541/ieejeiss.130.1337
  • Dual mode transmission PLC system with an EMC considered algorithm, Shinji Tsuzuki, Akihiko Goda, Shinpei Tatsuno, Seiichiro Ishii, Yoshio Yamada, Hiroyuki Kawasaki, Jun Nishioka, IEEE ISPLC 2010 - International Symposium on Power Line Communications and its Applications, 20100714, 10.1109/ISPLC.2010.5479931
  • Characteristics of 440V Power-Line Channels in Container Ships, ISPLC: 2009 IEEE INTERNATIONAL SYMPOSIUM ON POWER LINE COMMUNICATIONS AND ITS APPLICATIONS, 20080000, [Refereed]
  • An Adaptive Power Control Method to Electromagnetic Environment for PLC in Cargo Ships, ISPLC: 2009 IEEE INTERNATIONAL SYMPOSIUM ON POWER LINE COMMUNICATIONS AND ITS APPLICATIONS, 20080000, [Refereed]
  • Performance Evaluation of Localization by Acoustic DS-CDM Signals., Shinji Tsuzuki,Naoyuki Takeichi,Yoshio Yamada, Proceedings of the Global Telecommunications Conference, 2006. GLOBECOM '06, San Francisco, CA, USA, 27 November - 1 December 2006, 20060000, [Refereed], 1930-529X, 10.1109/GLOCOM.2006.499
  • High-Speed Power-Line Communication and Its Application to a Localization System., Shinji Tsuzuki, IEICE Transactions, 20060000, [Refereed], 10.1093/ietfec/e89-a.11.3006

Books etc

  • 20170100, 978-4-904774-51-9
  • 20121200, pp.227-236, ISBN978-4-907002-09-1
  • 20090000
  • 20070430, 4817302305
  • 20070000
  • 20070000
  • 20020726, 4886572197
  • Technical trends and applications on high-speed power line communication, 20090000

Conference Activities & Talks

  • 20180601, 招待有り
  • 20180526, 招待有り
  • Smart EMC in IoT era, Shinji Tsuzuki*(Ehime University), Masamitsu Tokuda (The University of Tokyo), Aya Ohmae (Hitachi, Ltd) Keiji Takakusaki (High Speed PLC Promoters’ Alliance of Japan), Akihisa Sakurai (IBM) Takashi Harada (Tokin EMC Engineering Co., Ltd.), Koki Harada, echnical Meeting on Electromagnetic Compatibility, IEE Japan, EMC-18-002, Sendai, Miyagi, 20180308
  • 20180306, 招待有り
  • 20180129, 招待有り
  • 電子百葉箱用太陽電池出力のEDLC充電回路の高効率化, 水野拡輝, 日野景太, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 20170916
  • Research and development of a cloud system utilizing geospatial information and environmental information for disaster mitigation by self-help efforts and mutual assistance – Progress report covering the first year –, TSUZUKI Shinji, Toru FUTAGAMI, Masayasu WATANABE, Yoshio YAMADA, The Eighteenth Workshop on Internet Technology (WIT2017), 20170623
  • Propagation characteristics of LoRa-SF12, TSUZUKI Shinji, Taiki GODA, Yoshio YAMADA, The Eighteenth Workshop on Internet Technology (WIT2017), 20170623
  • 20170519, 招待有り
  • 20170512, 招待有り
  • 輸送機械用電力線通信(PLC)の研究動向とSmart EMC, 都築伸二, 電子情報通信学会技術研究報告, 20170417, 招待有り
  • 20170329
  • 環境情報IoT基盤を用いた「校区のお天気」の可視化と広域化, 都築伸二, 日野景太, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 20160917
  • 電子百葉箱用太陽電池出力の充電回路の改良試作, 水野拡輝, 日野景太, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 20160917
  • 20160908, 招待有り
  • 太陽光パネルを用いた日射量稠密観測の可能性, 森脇亮, SIJAPATI Sweata, 都築伸二, 日本地球惑星科学連合大会予稿集(Web), 20160500
  • 20160418, 招待有り
  • 20151214, 招待有り
  • 太陽光パネルを用いた日射量モニタリング, 森脇亮, 都築伸二, 太陽/風力エネルギー講演論文集, 20151126
  • 20151007, 招待有り
  • スマート環境センシング基盤を用いた計測値の可視化, 日野景太, 都築伸二, 鈴木才太, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 20150926
  • スマート環境センシング基盤の構築と運用状況, 都築伸二, 音田拓哉, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 20150926
  • NFC歌留多を用いた熱中症予防見守りシステムの開発とその応用, 日野景太, 都築伸二, 兼久信次郎, 山田芳郎, 情報科学技術フォーラム講演論文集, 20150824
  • スマート環境センシング基盤の構築と地域デザインへの応用に関する研究開発, 都築伸二, 森脇亮, 山田芳郎, 柴田裕輔, 森本健一郎, 阿部幸雄, 越智正昭, 須東博樹, 情報科学技術フォーラム講演論文集, 20150824
  • 20150626, 招待有り
  • 20150602
  • 20150515, 招待有り
  • 20150424, 招待有り
  • PVの発電実績データに基づく日射量推定に関する基礎検討, 岡崎勇太, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 20140912
  • PV出力の多地点同時観測と雲の動きベクトル推定への応用, 鈴木才太, 都築伸二, 阿部幸雄, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 20140912
  • EV用ガレージ充電システムの試作とその自立度の検討, 大野拓也, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 20140912
  • 電子百葉箱用太陽電池の簡易MPPT回路の検討, 日野景太, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 20140912
  • One wire PLC system for inter-floor connectivity, Shinji Tsuzuki, Hiroyuki Utsunomiya, Yoshio Yamada, IEEE ISPLC 2014 - 18th IEEE International Symposium on Power Line Communications and Its Applications, 20140101, The conventional narrowband power-line communication (NB-PLC) is a two-wire system, that has injected its signal between wires using a capacitive coupler. When communicating between floors at a large-sized building, the signal has to travel over long-distances across a switchboard which supplies electricity to distribution boards. Moreover, the signal is attenuated not only at the switchboard but also at the distribution boards. Therefore signal amplifiers had to be installed at the boards. In this paper, a single wire PLC solution is proposed to shorten the communication distance and reduce the attenuation by taking a shortcut of the signal traveling path. It is described experimentally that the earth could be used as its signal returning path to the signal source. Therefore a single wire is enough to inject and receive the signal. An inductive coupling method suitable to this system is also proposed. The signal attenuation of the proposed system was 30dB better than that of the conventional two-wire system for our university building. The achieved performances of PLC modems also showed that the proposed system was useful. ? 2014 IEEE.
  • Radiation detection by employing periodic packets in power-line communication system, Intan Sari Areni, Intan Sari Areni, Shinji Tsuzuki, Yoshio Yamada, IEEJ Transactions on Electronics, Information and Systems, 20131201, The interference with existing radio broadcasting services because of unintentional radiation is a serious problem in power-line communication (PLC) systems. A radiation detection method based on burst packets, which had been proposed by the authors and was called scan and sum (SAS) method, was a low cost method and used to solve the problem. But its measurement took a long time and the burst packets occupied a channel. To shorten the measurement time, a new method based on periodic packets has been proposed in this paper, which is called periodic packet sound (PPS) method. Although both methods record the radiated signal as a sound data, the PPS does not need to scan the frequency of an AM radio receiver but analyses the sound data by a cross-correlation operation with a reference signal. First, how to generate the reference signal that depends on the modems is described. Second, an optimization of the packet size is studied, and finally it is shown that the detection sensitivity of PPS was maintained to be the same as SAS while the measurement time of PPS was 1/9 shorter than that of SAS. Moreover, the channel occupation of PPS was reduced to be 2% of SAS when the packet size was optimized to be 1500 bytes. ? 2013 The Institute of Electrical Engineers of Japan.
  • One Wire PLC System by Inductive Coupling, TSUZUKI Shinji, UTSUNOMIYA Hiroyuki, MATSUI Takashi, YAMADA Yoshio, IEICE technical report. WBS, Wideband System, 20131024, The conventional narrowband power-line communication (NB-PLC) is a two-wire system, that has injected its signal between wires with a capacitive coupler. When communicating between floors at a large-sized building, the signal has to travel over long-distances across a switchboard which supplies electricity to distribution boards. Moreover, the signal is attenuated not only at the switchboard but also at distribution boards. Then signal amplifiers have had to be installed at the boards. In this paper, a single wire PLC solution has been proposed to reduce the communication distance and avoid the attenuation by taking a shortcut. It has been described experimentally that the earth could be used as its signal returning path to the signal source. An inductive coupler suitable to this system has been also proposed. The signal attenuation of the proposed system was 30dB better than that of the conventional two-wire system according to our scenario. The achieved performances of PLC modems also showed that the proposed method was useful.
  • N-PE transmission system for Narrow-Band PLC and its channel properties, Intan Sari Areni, Intan Sari Areni, Shinji Tsuzuki, Yukiaki Yoshizawa, Yoshio Yamada, ISPLC 2013 - 2013 IEEE 17th International Symposium on Power Line Communications and Its Applications, Proceedings, 20130801, A new signal transmission system for Narrow-Band Power-Line Communications (NB-PLC) has been proposed as an alternative to the conventional system in order to solve the signal propagation loss problem. The conventional transmission system uses the Neutral and Live (N-L) conductors, while the N-PE system uses the Protective Earth (N-PE) conductor instead of L. The channel properties and Packet Reception success Rate (PRR) measured in a house, a laboratory, an office building, and a lecture building in Japan have been shown in this paper. These results showed that the propagation loss and the PRR performances of the proposed system were superior to those of the N-L system, except for the noise property. ? 2013 IEEE.
  • Field Trial Results of N-PE Transmission System for Narrow-Band PLC, YOSHIZAWA Yukiaki, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Communication systems, 20130627, Signal attenuation is a serious problem of the conventional Narrowband Power-line Communication (NB-PLC) system, which has used neutral and live (N-L) lines. To solve this problem, a new signal transmission system using neutral and protective earth (N-PE) lines has been proposed by the authors, and it had been shown that the system worked well at outlets connected to the same trunk cable. In this paper, the proposed system has been applied to two power-line environments. One was an environment where outlets were connected to different trunk cables. It has been shown that the proposed system achieved 24dB improvement of the attenuation. Another environment was an earth system used in Hawaii which is called TN-S system. It has been shown that the proposed system worked effectively also under the TN-S system.
  • A Proposal of N-PE Transmission System for Narrow-Band PLC, YOSHIZAWA Yukiaki, UTSUNOMIYA Hiroyuki, ARENI Intan Sari, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Communication systems, 20120705, In this paper, a new signal transmission system for Narrow-Band Power-Line Communications (NB-PLC) has been proposed in order to solve the problems of the conventional systems. The serious signal propagation loss was one of the problems for the differential-mode transmission system, which used the Neutral and Live (N-L) conductors. The proposing system does the Neutral and Protective Earth (N-PE) conductors. In order to compare the proposing N-PE transmission system with the N-L system, Packet Error Rate (PER) performances of 144 pairs of wall outlets for AC100V in the authors' laboratory have been measured. Although the 40% outlet pairs could not communicate at all for the N-L system, the ratio was improved to 4% for the proposed system. Moreover, to verify the results of the PER performances, the transfer function and impedance properties of the outlets were measured and the usefulness of the proposal system has been discussed.
  • A feasibility study of 1Gbps PLC system assuming a high-balanced DC power-line channel, Shinji Tsuzuki, Intan Sari Areni, Yoshio Yamada, 2012 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC 2012, 20120613, To realize an eco-house, a new direct current (DC) distribution system has received widespread attention. This paper has proposed countermeasures to fundamental problems which make difficult to achieve a high-speed PLC over the existing alternating current (AC) systems. To reduce the signal attenuation of the conventional low-voltage (LV) power-line cables made from vinyl insulator, it is recommended to use cables made from polyethylene insulator. It has been also recommended not to use the single pole and 3-way switches supposed to be cut into the hot conductor, and hand-made joint boxes in order to make the electrical balance of the channel high. To prove these proposals, a DC power-line system of 1.5kW capacity was built and the throughput was measured. The proposed simultaneous dual-mode system performed 1.9 times better throughput at maximum comparing with the conventional single-mode system. From these observations, a scenario for a 1Gbps Personal Area Network (PAN) over the new DC power-line channels is proposed. ? 2012 IEEE.
  • Packet size optimization of PPS based radiation detection for AEE-PLC, Intan Sari Areni, Shinji Tsuzuki, Yoshio Yamada, 2012 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC 2012, 20120613, AEE-PLC (Adaptive power control method to Electromagnetic Environment for the Power-Line Communication) system was proposed by the authors to achieve the maximum throughput performance without radiation. As its radiation detection method, two methods were also proposed. One was called Scan and Sum (SAS) method which detected the radiation of burst packets. Another was Periodic Packet Sound (PPS) method which did it of ICMP (Internet Control Message Protocol) packets generated by the PING (Packet Internet Groper) command. When the throughput performance was measured for the SAS method, the received number of the burst packets was used. For the PPS method, extra burst packets were needed. To avoid them, ICMP packets generated by the utility software of Pchar (Path Characteristics) has been introduced in this paper. The relationship between the size of ICMP packets and the detection sensitivity has been also studied to optimize the size. The result has been confirmed that 1500 Bytes was the optimum size which achieved the high sensitivity with the low channel occupation. ? 2012 IEEE.
  • Development of BPL Systems for Cargo Ships and Some Topics of Smart Meter Based on NB-PLC Technologies : Research Results Sponsored by MIC-SCOPE and Some Topics from IEEE-ISPLC Symposium, TSUZUKI Shinji, IEICE technical report. WBS, Wideband System, 20110721, To solve the problems of the conventional alternating current (AC) electricity distribution system essentially, a high-speed PLC communication system, which target speed is 1Gbps, on cargo ships has been developed in this paper. The system was realized over a new direct current (DC) distribution system, which puts low stress on environment. It is shown first that the signal attenuation characteristic of polyethylene-insulator power cables is equal to or better than that of LAN cables and the coaxial cables. Next, installation methods to make the balance performance of the polyethylene cables excellent are proposed. It is experimentally shown that a proposed method of the dual mode transmission for the PLC signals, that is appropriate for the high balanced power-lines, performed 1.9 times throughput at maximum. Moreover, it is described that an LED (Light Emitting Diode) Visible Light Communication (VLC) system was implemented to realize a wireless and seamless network environment with the wired PLC systems.
  • A study of radiation detection methods for cognitive PLC system, Intan Sari Areni, Shinji Tsuzuki, Yoshio Yamada, 2011 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC 2011, 20110530, A radiation detection method based on burst packets, which was proposed by the authors and is called Scan and Sum (SAS) method, needed so long time, because frequency scanning and power summation were required. To solve the problem, a new method based on ICMP packets has been proposed in this paper, which is called Periodic Packet Sound (PPS) method. The PPS method doesn't scan but record the packets' signal sound for a while at a frequency band. From the recorded sound data, ICMP packets data are picked up using their periodicity and their signal power is calculated. In this paper, both methods have been examined in the hallway of authors' laboratory. To investigate the sensitivity of both methods, the distance between a radiation point and an antenna was changed. Detection limitation distance of the proposed PPS method was the same as that of SAS, while the measurement time was shorten from 90 seconds to 10 seconds. ? 2011 IEEE.
  • Radiation detection and mode selection for a cognitive PLC system, Shinji Tsuzuki, Shinpei Tatsuno, Intan Sari Areni, Yoshio Yamada, 2011 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC 2011, 20110530, To improve the throughput performance of HF-PLC systems, a dual-mode transmission system, which utilizes the mode diversity of differential and common modes, has been studied by the authors. However, the system which uses the common-mode has a risk to cause the unintentional radiation problem. To solve the problem, an Adaptive power control method to the Electromagnetic Environment, which is called AEE, has been proposed. The radiation detection was achieved by receiving emitted PLC signals at affected (or concerned) devices. In this paper, a new detection method and a new mode-selection method have been proposed, and it is shown that their preliminary results are attractive from the viewpoint of usefulness. ? 2011 IEEE.
  • A-5-12 A Maritime Machinery Monitoring System using PLC and VLC, Takechi Mitsushi, Tsuzuki Shinji, Kawasaki Hiroyuki, Yamada Yoshio, Proceedings of the IEICE General Conference, 20110228
  • A-5-13 A Study of Improving the DC100V Power-Line Channel Transmission Characteristics, Kawasaki Hiroyuki, Ishii Seiichiro, Tsuzuki Shinji, Kutsuna Naoki, Yamada Yoshio, Proceedings of the IEICE General Conference, 20110228
  • Wiring method improvement for the high speed PLC in cargo ships, ISHII Seiichiro, TSUZUKI Shinji, KAWASAKI Hiroyuki, KUTSUNA Naoki, YAMADA Yoshio, IEICE technical report. Signal processing, 20110224, Broadband Power-line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. It is a feature of power-line channels in cargo ships, which are the target of this paper, that the amount of the signal attenuation is larger than that in homes. It is the main reason of the attenuation that there are a lot of circuits in distribution panels. Then, the amount of attenuation per circuit has been estimated in this paper, and it is described that the reduction of the number of circuits was the most effective improvement method. The next effective method was to change the insulating material of power-line cables to the lower attenuation one. Moreover, it has been described that the impedance matching at the end of cables might be effective in the improvement of throughput performance, though it doesn't contribute to reduce the amount of the signal attenuation.
  • Throughput of Dual-mode PLC system with Simultaneous and Selective Transmission, GOUDA Akihiko, TSUZUKI Shinji, KAWASAKI Hiroyuki, YAMADA Yoshio, IEICE technical report. Signal processing, 20110224, As the injection and reception modes of power-line communication (PLC) signals, two modes of the differential and common can be used, so that there are four kinds of propagation modes. The proposing dual-mode transmission PLC system uses these propagation modes. In this paper, two types of the dual-mode system have been studied. One is called "selective type" that chooses the best propagation mode from four modes. Another type is "simultaneous" type, which utilizes the two injection and reception modes at the same time. To evaluate the proposing systems, two kinds of power distribution systems were constructed, which were assumed as a DC power system in house and ship, respectively. By using these DC power distribution systems, the throughput performance was measured. As a result, if the electrical balance of the power-line channels was good, the throughput of the simultaneous type achieved 1.9 times or more performance comparing to that of the conventional type. Moreover, even if the balance was not good, the obtained performance was equal to or more than that of the conventional type by using the proposing method which used both types properly.
  • Wiring method improvement for the high speed PLC in cargo ships, ISHII Seiichiro, TSUZUKI Shinji, KAWASAKI Hiroyuki, KUTSUNA Naoki, YAMADA Yoshio, IEICE technical report. Circuits and systems, 20110224, Broadband Power-line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. It is a feature of power-line channels in cargo ships, which are the target of this paper, that the amount of the signal attenuation is larger than that in homes. It is the main reason of the attenuation that there are a lot of circuits in distribution panels. Then, the amount of attenuation per circuit has been estimated in this paper, and it is described that the reduction of the number of circuits was the most effective improvement method. The next effective method was to change the insulating material of power-line cables to the lower attenuation one. Moreover, it has been described that the impedance matching at the end of cables might be effective in the improvement of throughput performance, though it doesn't contribute to reduce the amount of the signal attenuation.
  • Throughput of Dual-mode PLC system with Simultaneous and Selective Transmission, GOUDA Akihiko, TSUZUKI Shinji, KAWASAKI Hiroyuki, YAMADA Yoshio, IEICE technical report. Circuits and systems, 20110224, As the injection and reception modes of power-line communication (PLC) signals, two modes of the differential and common can be used, so that there are four kinds of propagation modes. The proposing dual-mode transmission PLC system uses these propagation modes. In this paper, two types of the dual-mode system have been studied. One is called "selective type" that chooses the best propagation mode from four modes. Another type is "simultaneous" type, which utilizes the two injection and reception modes at the same time. To evaluate the proposing systems, two kinds of power distribution systems were constructed, which were assumed as a DC power system in house and ship, respectively. By using these DC power distribution systems, the throughput performance was measured. As a result, if the electrical balance of the power-line channels was good, the throughput of the simultaneous type achieved 1.9 times or more performance comparing to that of the conventional type. Moreover, even if the balance was not good, the obtained performance was equal to or more than that of the conventional type by using the proposing method which used both types properly.
  • Wiring method improvement for the high speed PLC in cargo ships, ISHII Seiichiro, TSUZUKI Shinji, KAWASAKI Hiroyuki, KUTSUNA Naoki, YAMADA Yoshio, IEICE technical report. Communication systems, 20110224, Broadband Power-line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. It is a feature of power-line channels in cargo ships, which are the target of this paper, that the amount of the signal attenuation is larger than that in homes. It is the main reason of the attenuation that there are a lot of circuits in distribution panels. Then, the amount of attenuation per circuit has been estimated in this paper, and it is described that the reduction of the number of circuits was the most effective improvement method. The next effective method was to change the insulating material of power-line cables to the lower attenuation one. Moreover, it has been described that the impedance matching at the end of cables might be effective in the improvement of throughput performance, though it doesn't contribute to reduce the amount of the signal attenuation.
  • Throughput of Dual-mode PLC system with Simultaneous and Selective Transmission, GOUDA Akihiko, TSUZUKI Shinji, KAWASAKI Hiroyuki, YAMADA Yoshio, IEICE technical report. Communication systems, 20110224, As the injection and reception modes of power-line communication (PLC) signals, two modes of the differential and common can be used, so that there are four kinds of propagation modes. The proposing dual-mode transmission PLC system uses these propagation modes. In this paper, two types of the dual-mode system have been studied. One is called "selective type" that chooses the best propagation mode from four modes. Another type is "simultaneous" type, which utilizes the two injection and reception modes at the same time. To evaluate the proposing systems, two kinds of power distribution systems were constructed, which were assumed as a DC power system in house and ship, respectively. By using these DC power distribution systems, the throughput performance was measured. As a result, if the electrical balance of the power-line channels was good, the throughput of the simultaneous type achieved 1.9 times or more performance comparing to that of the conventional type. Moreover, even if the balance was not good, the obtained performance was equal to or more than that of the conventional type by using the proposing method which used both types properly.
  • 20110000
  • Attenuation characteristic modeling of power-line channel in cargo ships, Shinji Tsuzuki, Seiichiro Ishii, Jun Nishioka, Yoshio Yamada, IEEJ Transactions on Electronics, Information and Systems, 20100928, Power-line communication (PLC) based local area network (LAN) in cargo ships is one of the promising applications of the PLC technology. In this paper, the signal attenuation characteristic when transmitting with the differential-mode (DIF) and the common-mode (COM) has been modeled respectively to design the PLC network in a cargo ship. The characteristic has been analyzed from the measured transfer function of 440 V power-line channels for reefer containers in two typical ships. The measured transfer function was averaged from 2 M to 30 MHz (or until the measurement limit frequency) and approximated by the number of branches and the length of a signal propagating route. The mean accuracy of the obtained approximation equations was ±4dB. The area where the signal attenuation of COM transmission is less than that of DIF transmission has been studied from the equations. ? 2010 The Institute of Electrical Engineers of Japan.
  • Attenuation Characteristic Modeling of Power-line Channel in Cargo Ships, TSUZUKI Shinji, ISHII Seiichiro, NISHIOKA Jun, YAMADA Yoshio, IEEJ Transactions on Electronics, Information and Systems, 20100801, Power-line communication (PLC) based local area network (LAN) in cargo ships is one of the promising applications of the PLC technology. In this paper, the signal attenuation characteristic when transmitting with the differential-mode (DIF) and the common-mode (COM) has been modeled respectively to design the PLC network in a cargo ship. The characteristic has been analyzed from the measured transfer function of 440V power-line channels for reefer containers in two typical ships. The measured transfer function was averaged from 2M to 30MHz (or until the measurement limit frequency) and approximated by the number of branches and the length of a signal propagating route. The mean accuracy of the obtained approximation equations was ±4dB. The area where the signal attenuation of COM transmission is less than that of DIF transmission has been studied from the equations.
  • Dual mode transmission PLC system with an EMC considered algorithm, Shinji Tsuzuki, Akihiko Goda, Shinpei Tatsuno, Seiichiro Ishii, Yoshio Yamada, Hiroyuki Kawasaki, Jun Nishioka, IEEE ISPLC 2010 - International Symposium on Power Line Communications and its Applications, 20100714, A dual-mode transmission system which utilizes the differential and common modes has been proposed. To improve the channel capacity, a simple diversity, which selected the better transmission mode at a client PC side, was examined at laboratory rooms in a building. It was found that the amount of throughput improvement was 45% compared with the conventional single mode transmission of differential-mode. To overcome the unintentional radiation problem caused by the common-mode transmission, an EMC considered algorithm referred to as a power control algorithm which was adaptive to the electromagnetic environment (AEE) was applied to the proposed system. It has been concluded that relatively small areas such as in a house, an office floor in a building and so on, would be the suitable place of the proposed system. ?2010 IEEE.
  • A-5-19 A Study of DC Power Distribution Cable for High Speed Power-line Communication in House, Tsuzuki Shinji, Ohnishi Masatsua, Kawasaki Hiroyuki, Yamada Yoshio, Proceedings of the IEICE General Conference, 20100302
  • A-5-20 High Speed Power Line Communication using DC Line in Cargo Ships, Kawasaki Hiroyuki, Tsuzuki Shinji, Yamada Yoshio, Kutsuna Naoki, Proceedings of the IEICE General Conference, 20100302
  • Improvement of noise tolerance and positioning accuracy using spread spectrum sound wave in noisy environment, Tomowo Shiigi, Naoshi Kondo, Shinji Tsuzuki, Shigeru Okada, Akira Maekawa, Toshiharu Nobara, Masao Sakakibara, Kenji Watanabe, Yuko Naniwada, Kiyotaka Okada, American Society of Agricultural and Biological Engineers Annual International Meeting 2010, ASABE 2010, 20100101, There are a lot of researches on position determination methods in room such as wireless LAN, RFID, infrared ray, TV camera, sound wave and etc. Among them, it is considered that a positioning system using sound has some merits of high measurement accuracy and low cost. In our research group, a positioning system using spread spectrum sound has been developed. So far, a system for measuring distance was developed and evaluation of its measurement accuracy was conducted. As a result of measurement under a condition of no wind, no temperature gradient and no noise, RMSE of 10m distance between a microphone and a speaker was 3.4mm. However, there are various noises, winds and temperature conditions in actual facilities such as fruit grading facilities, greenhouses, and dairy farms. It is, therefore, important to improve noise tolerance and to compensate changeable sound velocity by wind and temperature. In this paper, evaluation of noise tolerance was conducted by using three type sounds.
  • An adaptive power control method to electromagnetic environment for PLC in cargo ships, Shinji Tsuzuki, Shinpei Tatsuno, Mitsushi Takechi, Toshimasa Okabe, Hiroyuki Kawasaki, Terushi Shinpo, Yoshio Yamada, Shunsuke Takaoka, 2009 IEEE International Symposium on Power Line Communications and its Applications, ISPLC 2009, 20090921, Abstract Power-Line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. However, the unintentional-radiation is the serious problem for ship applications because the PLC system must coexist with the emergency communication system and shortwave broadcasting services. In this paper, a power control method of PLC modems depending on the radiation strength is proposed and examined in a training ship. It is proposed to use an antenna for shortwave radios and a wideband receiver (WBR) to measure the radiation strength. It is shown that the sensitivity of the WBR is 17dB better than that of a spectrum analyzer. And by using the antenna, the WBR can be set up at any cabin in ship to measure the radiation strength. The proposed power-control algorithm consists of two modes, silent and power-control modes. After the environmental noise level is measured in the silent mode, the power level of PLC modems which cause the radiation is lowered to be the same level as the environmental noise level. If modems do not cause the radiation, their power level is raised as much as possible to guarantee the maximum possible throughput under the EMC regulation. By executing the silent mode occasionally, the controlled power level is adapted to the environmental noise level. ? 2009 IEEE.
  • Characteristics of 440V power-line channels in container ships, Jun Nishioka, Shinji Tsuzuki, Michinori Yoshida, Hiroyuki Kawasaki, Tterushi Shinpo, Yoshio Yamada, 2009 IEEE International Symposium on Power Line Communications and its Applications, ISPLC 2009, 20090921, Control and monitoring is a promising application of power-line communications (PLC) in cargo-carrying ships. The container ship studied in this paper is a type of cargo-carrying ships. The reefer containers on the container ship have been monitored by using PLC over the three-phase 440V line. Since not only reefer containers but also a lot of equipment are connected to the three-phase 440V electric power-line, the obtained speed and quality of the PLC system have been so poor that improvement had been required. To improve the performance, the introduction of the wideband PLC technology is considered in this paper because the conventional PLC system is based on the narrowband PLC technology. There are few reports which describe the channel characteristics of cargo-carrying ships. Although the authors had been measuring the characteristics of 100V lines in the ships since 2007, the characteristics of 440V lines had not measured as yet. In this paper, the measurement results of the transmission characteristics in three-phase 440V electric power-lines of the container ships are explained and modeled. Two transmission modes, differential and common, were examined in the measurement. The results show that it will be possible to perform stable and high -speed PLC systems over long distances using the 3 phase 440V power-line of cargo ships if the differential transmission mode will be used. ? 2009 IEEE.
  • PLC system based on Automatic Transmission-mode Selection, GODA Akihiko, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. WBS, Wideband System, 20090716, Although the conventional PLC (Power Line Communication) modems use only the differential-mode transmission, the authors has proposed the dual-mode transmission that uses the better transmission mode selected from the differential and common modes to increase the channel capacity. However, the mode selection was done manually, so that the adaptive mode control could not be achieved even when the channel condition changed. In this paper, an automatic mode-selection method based on a throughput measurement is proposed. And its evaluation result is also shown.
  • Delay and Attenuation Characteristics of Power-Line Channels in Ships, ISHII Seiichiro, TSUZUKI Shinji, NISHIOKA Jun, YAMADA Yoshio, IEICE technical report. WBS, Wideband System, 20090527, Power-line Communication (PLC) based local area network (LAN) in ships are one of the promising applications of the PLC technology. In this paper, the delay profiles have been analyzed from the transfer function of 100V power-line channels of residence area in ships and that of 440V power-line channels for reefer containers, which had been measured by the authors. It was found that the characteristics of the delay spread were able to be approximated by a liner function of which the parameters were the length of cable and the delay spread in distribution panels. The cumulative distribution of delay time has also been calculate, and the required guard-interval value for the OFDM system in ships has been shown. In addition, the area where the signal attenuation of common-mode transmission becomes less than that of differential-mode has been studied from the channel model of attenuation.
  • A-5-25 A Simple Method of Measuring the Radiation Strength of PLC Signals for Coexisting with Shortwave Broadcasts on a Ship, Tatsuno Shinpei, Tsuzuki Shinji, Yamada Yoshio, Proceedings of the IEICE General Conference, 20090304
  • A-5-24 A PLC-Modem Control Method to Be Adaptive to the Electromagnetic Environment on Cargo Ships, Takechi Mitsushi, Tsuzuki Shinji, Tatsuno Shinpei, Kawasaki Hiroyuki, Okabe Toshimasa, Shinpo Terushi, Takaoka Syunsuke, Proceedings of the IEICE General Conference, 20090304
  • Channel characteristic comparison of armored shipboard cable and unarmored one, Shinji Tsuzuki, Michinori Yoshida, Yoshio Yamada, Kazuhiro Murai, Hiroyuki Kawasaki, Kenta Matsuyama, Terushi Shinpo, Yoshihiro Saito, Shunsuke Takaoka, IEEE ISPLC 2008 - 2008 IEEE International Symposium on Power Line Communications and Its Applications, 20080912, Power-Line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. There are two types of ships from the viewpoint of the cable structure. One is all the power-line cables are armored, and another type is partly unarmored cables are used. For example, all the cables in cargo ships whose characteristics we measured at last year, were armored, although the cables in a training ship shown in this paper are unarmored partly. In this paper, the channel characteristic which the cable structure affects has been discussed by comparing the two types of ships. It has been concluded that if the unarmored cable is used in a ship, the common-mode transmission will be more useful than the conventional differential-mode transmission, although the countermeasure against unintentional radiation will be needed at the same time. If all the cables are armored in a ship, the radiation problem will not occur, although a kind of adaptive transmission-mode selection technique will be needed to improve the channel capacity of the conventional differentialmode transmission system.
  • Characteristics of Power-Line Channels on the 440V Line of Container ships, NISHIOKA JUN, TSUZUKI Shinji, YOSHIDA Michinori, KAWASAKI Hiroyuki, SHINPO Terushi, YAMADA Yoshio, IEICE technical report. WBS, Wideband System, 20080718, In the container ship, which is a kind of the cargo-carrying vessel, the reefer container is monitored by the power line communication (PLC) on the three-phase 440V electric power line. It uses the band 55kHz-440kHz. However, in recent years it often happens that machinery equipped with the inverter is installed in the ship. Therefore the PLC construction of a system using this frequency band is difficult. Then, the authors studies whether a steadier PLC system can be achieved by using the frequencies in the range of 2MHz or higher. In this paper, the measurement results of the transmission characteristic, the noise characteristic, and unintentional radiation that comes out of a power line in three-phase 440V system of the container ship are shown. These results show that in contrast to what has been done previously, it is possible to perform steady communication using the band 2MHz-20MHz in the differential mode.
  • 20080200
  • Operator detection method for the construction of virtual low-noise space using spread spectrum acoustic waves, Tomowo Shiigi, Naoshi Kondo, Vui Kiong Chong, Shinji Tsuzuki, Shigeru Okada, Toshiharu Nobara, American Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008, 20080101, Many types of agricultural facilities for grains, fruits, nuts, and vegetables have been constructed at many places in the world. Although most of operations are mechanized in the facilities, high noise from the mechanical systems often force operators inefficient or unsafe work in the agricultural facilities. Virtual low-noise space for operators' working space under noisy environment in facility has been studied so far for keeping safety and comfortable working condition. In the previous study, machine vision was adopted to determine the location of the user. However, the developed system is only workable for a narrow area of 1.5m2. This paper focuses on operators' location sensing methods by using Spread Spectrum Acoustic Waves. From the experimental results in an orange grading facility, the method of Spread Spectrum Acoustic Waves could show that noise tolerance was 13dB and there were possibilities to enlarge measurement area and to increase operator number in the virtual low-noise space.
  • 20080000
  • 20080000
  • Applications of High Speed PLC Technology to Ships, KAWASAKI Hiroyuki, TSUZUKI Shinji, Marine engineering, 20071101
  • Characteristics of Power-Line Channels in the Training Ship YUGEMARU, YOSHIDA MICHINORI, TSUZUKI Shinji, YAMADA Yoshio, MURAI Kazuhiro, TAKECHI Mitsushi, MATSUYAMA Kenta, SHINPO Terushi, SAITO Yoshihiro, TAKAOKA Shunsuke, IEICE technical report. WBS, Wideband System, 20071009, Power-Line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. The authors measured the characteristics of power-line in cargo ships last year. A feature of power distribution systems in the cargo ships is that all power-line cables in the ships are armored. In this paper, the transfer function of the training ship YUGEMARU is shown and compared with that of the cargo ships. The length of YUGEMARU is shorter than that of the cargo ships, and the unarmored power-line cable is partly used. But topology of the distribution system is the same. Furthermore, it is also shown that the degree of unintentional radiation depends on the outlet into which signals are injected.
  • Characteristics of power-line channels in cargo ships, Shinji Tsuzuki, Michinori Yoshida, Yoshio Yamada, Hiroyuki Kawasaki, Kazuhiro Murai, Kenta Matsuyama, Mitsunari Suzuki, 2007 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC'07, 20070926, The broadband PLC in cargo ships is a long-awaited technology. However the characteristics of power-line channels in the cargo ships have not been studied yet. The most unique point of the channels is that power-line cables used in most Asian cargo ships are shielded. In order to characterize the channel and investigate a suitable PLC system to the cargo ships, some parameters were measured in three typical ships. The parameters were the transfer functions (LCTR, LTR and TTR), LCL and stationary noise spectrum. From these measurements, (1) the required dynamic range of receivers, (2) average attenuation at distribution boards, (3) phase coupling loss and (4) average LCL values were derived in this paper. Since the cables are shielded and the hull provides the good ground, the usage of the common-mode transmission in addition to the conventional differentialmode, which is referred to as a dual-mode transmission system, is also proposed. Therefore the measured parameters above were included the common-mode and mode-conversion properties. As the evidence to support our proposal, some results in which the LCTR values were superior to the TTR values are shown. ? 2007 IEEE.
  • BT-2-5 Research on PLC Applications : Cargo Ship LAN and In-home Precise Localization, Tsuzuki Shinji, Proceedings of the IEICE General Conference, 20070307
  • A-5-20 Measurement of Power-Line Channel Characteristics in Cargo Ships, Kawasaski Hiroyuki, Tsuzuki Shinji, Yoshida Michinori, Yamada Yoshio, Murai Kazuhiro, Matsuyama Kenta, Suzuki Mitsunari, Proceedings of the IEICE General Conference, 20070307
  • A-5-21 Attenuation Characteristics at Power Distribution Boards in Cargo Ships, Yoshida M., Tsuzuki S., Yamada Y., Kawasaki H., Murai K., Matsuyama K., Suzuki M., Proceedings of the IEICE General Conference, 20070307
  • A Proposal of Multi-site Videoconferencing System Using Two DV Multicast Streams, TAKECHI Mitsushi, TSUZUKI Shinji, YAMADA Yosio, 情報処理学会研究報告インターネットと運用技術(IOT), 20070119, The relay systems for multi-site video conferencing by DV over IP are described. Although a monitor screen has been divided into multi-portions in order to watch the circumstances of remote places for the conventional systems, the required network bandwidth for the relay has been assumed to be large. On the other hand, the proposing system has the feature that the required bandwidth is small (its average is 30Mbps, and the maximum is 60Mbps) since only the video of those who have spoken is transmitted. However, they had to talk while looking at their own faces. To solve the problem, a system using two DV multicast streams is proposed in this paper, while the required bandwidth is still small.
  • A Proposal of Multi-site Videoconferencing System Using Two DV Multicast Streams, TAKECHI Mitsushi, TSUZUKI Shinji, YAMADA Yosio, IEICE technical report. Internet Architecture, 20070111, The relay systems for multi-site video conferencing by DV over IP are described. Although a monitor screen has been divided into multi-portions in order to watch the circumstances of remote places for the conventional systems, the required network bandwidth for the relay has been assumed to be large. On the other hand, the proposing system has the feature that the required bandwidth is small (its average is 30Mbps, and the maximum is 60Mbps) since only the video of those who have spoken is transmitted. However, they had to talk while looking at their own faces. To solve the problem, a system using two DV multicast streams is proposed in this paper, while the required bandwidth is still small.
  • 20070000
  • A proposal of synchronization beacon systems over power-line for indoor fine-grained localization, Shinji Tsuzuki, Naoyuki Takeichi, Masahiro Hamada, Yoshio Yamada, 2006 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC'06, 20061201, One of the problems in power-line communications (PLC) is an unnecessary radiation due to the electrical unbalance of power-lines. However, it means that power-lines can work as antennas. In this paper, a beacon signal radiation system by the power-line antenna for time synchronization among wireless and wired nodes is proposed. The considered application of the radiation system is an indoor fine-grained localization, which is determining where a given node is physically located in a room. A preliminary implementation of the localization by an acoustic rangefinder is described. Unlike other published work in this area, our rangefinder uses Direct-Sequence Code Division Multiplexed (DS-CDM) audible sound signals to detect the distance between the receiver node (i.e. microphone) and the reference point (i.e. speaker) inferred from the time of flight of the sound wave. This technique significantly improves performance in obstructed and noisy environments. The obtained localization accuracy was about 1cm in a 4m 2 plane. As a merit of using the power-line antenna, its wideness of the coverage area is also described experimentally by comparing with that of a conventional loop antenna system. ? 2006 IEEE.
  • Special section on wide band systems, Shin'ichi Tachikawa, Shin'ichi Tachikawa, Shin'ichi Tachikawa, Tetsushi Ikegami, Hiroyasu Ishikawa, Tomoaki Ohtsuki, Takehiko Kobayashi, Shin'ichi Sato, Yukitoshi Sanada, Masahiko Shimizu, Kazuaki Takahashi, Shinji Tsuzuki, Hiroyuki Nakase, Hiromasa Habuchi, Shinsuke Hara, Shinya Matsufuji, Kouji Ohuchi, Masanori Hamamura, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 20061101
  • High-speed power-line communication and its application to a localization system, Shinji Tsuzuki, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 20061101, This paper overviews the high-speed power-line communication (PLC) technology, and the related standardization and regulatory activities are described. PLC modems of 200 Mbps class become a practical use stage in the West, and the standardization activity is active now. The discussion for deregulation is being continued in also Japan, and regulation values have been proposed. Another topic in this paper is a sensor network application of PLC, which is an indoor fine-grained localization system by acoustic Direct-Sequence Code Division Multiplexed (DS-CDM) signals. The obtained average accuracy of the localization in a 4 m2 plane was 1 cm if there was no obstacle. To realize the localization system, some novel ideas, such as PLC speakers, a synchronization method based on the zero-crossing timing of the mains frequency, and integrated wired/wireless PLC, are introduced. Copyright ? 2006 The Institute of Electronics, Information and Communication Engineers.
  • A study of producing an LCL probe for residential power lines, Yasuto Kawakami, Yasuto Kawakami, Shinji Tsuzuki, Shinji Tsuzuki, Shinji Tsuzuki, Masaru Wasaki, Yoshio Yamada, Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi), 20060501, Although power-line communications are expected as a promising method to realize an in-home network, one of their difficulties is an unnecessary radiation due to the electrical unbalance of power-line channels. To solve the problem, the statistical data of electrical unbalance based on measurements in the practical fields, that is, many and various Japanese residential power lines, must be collected as the first step. In this paper, a method to produce a longitudinal-conversion-loss (LCL) probe that can be used for the practical measurement is studied. The LCL is a measure of the electrical unbalance, and is often used to determine the impairment of EMC performance of a system by the cabling. To improve the dynamic range of the probe, an adjustment method of the transformers' parameters is proposed. According to our scenario, the obtained dynamic range was better than that of the conventional probe with the frequency band higher than 2 MHz. The achieved improvement was 6 dB at 6 MHz, and 14 dB at 30 MHz, for example. ? 2006 Wiley Periodicals, Inc.
  • 20060000
  • Power-line channel modeling for common-mode signal transmission/suppression, Shinji Tsuzuki, Michinori Yoshida, Yoshio Yamada, 2005 International Symposium on Power Line Communications and Its Applications, ISPLC 2005, 20051201, The common-mode signal transmission and suppression are attractive from the viewpoints of the channel-capacity improvement and adaptive cancellation of the unwanted radiation from the power-line. To study this transmission and suppression, a channel modeling method based on the transmission-matrix theory is proposed in this paper. And the proposed modeling accuracy is evaluated by using an LCL probe which the authors had developed. As an application example of the proposed model, the channel capacity depending on the electrical unbalance of power-line channels is approximated for the common-mode signal transmission. ? 2005 IEEE.
  • Home Network and Sensor Network by Power-Line Communications, TSUZUKI Shinji, IEICE technical report. WBS, Wideband System, 20050707, In recent years, high-speed power-line communication (PLC) systems attract attention. In this paper, the PLC systems are classified into three applications, i.e., Internet access, home-network, and inter-house or in-building communications, and their current situations are explained. In them, ultra high-speed (around 200Mbps) PLC systems applied to Internet access (Access BPL) and home-network (HomePlug AV) of the U.S. are the latest topics. However, since these high-speed PLC systems use the high frequency (HF) band, i.e., 2M to 30MHz, the unnecessary radiation from power-lines poses interference to existing radio stations using the same band. Although the HF-band PLC systems are already commercialized in the West where regulation is comparatively loose, it is under examination in Japan whether HF-band use should be permitted. The trend of such regulatory frameworks is also described.
  • An Implementation Study of a Repeater for Digital Video Multi-points Teleconferencing over FTTH Internet Access Services, TSUZUKI Shinji, IGUCHI Yoshinori, YAMADA Yoshio, IPSJ SIG Notes, 20050323, In this paper, an implementation method of a repeater for Digital Video (DV) multi-points teleconferencing over FTTH (Fiber To The Home) Internet access services is studied. One of the problems in the conventional DV streaming method was the serious number of packet-losses. This paper shows that the burst packet-transmission caused the problem. By the proposing software method of smoothing the packet intervals, the probability of the burst packet-loss decreased effectively even when PCs working under general propose OS transmitted the packets. The conventional repeater had another problem, which was the long delay time due to the analog to digital conversion for multi-window display processing. The proposed repeater selected automatically the speaker's picture which should be relayed, instead of multi-window displaying, so that the required delay time could be reduced.
  • B-7-63 The Measures against Packet Loss in Digital Video Streaming via FTTH Internet Access Lines, Iguchi Y., Tsuzuki S., Yamada Y., Proceedings of the IEICE General Conference, 20050307
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  • A Study of Producing an LCL Probe for Residential Power-lines, KAWAKAMI Yasuto, TSUZUKI Shinji, WASAKI Masaru, YAMADA Yoshio, IEEJ Transactions on Electronics, Information and Systems, 20040701, Although power-line communications are expected as a promising method to realize an in-home network, one of their difficulties is an unnecessary radiation due to the electrical unbalance of power-line channels. To solve the problem, the statistical data of electrical unbalance based on the measurement at the practical fields, i.e., many and various Japanese residential power-lines, must be collected as the first step. In this paper, a method to produce a longitudinal-conversion-loss?(LCL) probe that can be used for the practical measurement is studied. The LCL is a measure of the electrical unbalance, and is often used to determine the impairment of EMC performance of a system by the cabling. To improve the dynamic range of the probe, an adjustment method of transformers' parameters is proposed. According to our scenario, the obtained dynamic range was better than that of the conventional probe with the frequency band higher than 2MHz. The achieved improvement was 6dB at 6MHz, and 14dB at 30MHz, for example.
  • Current Situation and Foremost Task of High-Speed Power-Line Communications, TSUZUKI Shinji, YAMADA Yoshio, Annual journal of engineering, Ehime University, 20040300, Power-line communications (PLC) are classified into three applications, i. e., Internet access, home-network, and inter-house communications, and those current situations in Japan are explained in this paper. The experiments of Internet access service by Japanese power utility companies and the activity of HomePlug Powerline Alliance in U. S. A., i. e., high speed PLC using HF frequency band (2M to 30MHz) for home-networking, are introduced. To realize the latter technology in Japan, it is also explained that the deregulation and the solution for the interference to the existing radio stations are needed.
  • Improvement of DV Transmission Program over IP Network, MITSUEDA Keiichi, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Internet Architecture, 20040121, The authors have been developing a real-time transmission program of digital video (DV) data from a high quality video camera over IP networks, and upgraded recently. In this paper, the upgraded points, that is its user-interface, communication protocols, and a solution of packet loss problems are reported. Moreover, the developed program is compared to DVTS that is a well-known program and provides similar functions to our program, and superior points of the proposed program are explained.
  • Improvement of DV Transmission Program over IP Network, MITSUEDA Keiichi, TSUZUKI Shinji, YAMADA Yoshio, 情報処理学会研究報告インターネットと運用技術(IOT), 20040120, The authors have been developing a real-time transmission program of digital video (DV) data from a high quality video camera over IP networks, and upgraded recently. In this paper, the upgraded points, that is its user-interface, communication protocols, and a solution of packet loss problems are reported. Moreover, the developed program is compared to DVTS that is a well-known program and provides similar functions to our program, and superior points of the proposed program are explained.
  • The home network by power-line communication(Telecommunication Management), TSUZUKI Shinji, Technical report of IEICE. TM, 20040115, Power-Line communications (PLC) are classified into three applications, i.e., Internet access, home-network, and inter-house communications, and those current situations in Japan are explained in this paper. The experiments of Internet access service by Japanese power utility companies and the activity of HomePlug Powerline Alliance in U.S.A., i.e., high speed PLC using HF frequency band (2M to 30MHz) for home-networking, are introduced. To realize the latter technology in Japan, it is also explained that the deregulation and the solution for the interference to the existing radio stations are needed.
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  • Power-line communication, Shinji Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 20030501
  • Power-Line Communication (Cable Network) (Trend of Hardware Technologies) ( The Era of the Broadband Network -Basic Technologies and Services-), Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 20030501
  • Measurement of BER Characteristics of Phantom Transmission with Residential 3-Wires Power Line, INADA Keigo, TUZUKI Shinji, YAMADA Yoshio, Proceedings of the IEICE General Conference, 20030303
  • Continuous Templete Matching Method Using Neural Networks, Yamada Yoshio, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 20030301, 入力画像-テンプレート画像間の相互相関係数を帯域制限補間することによって,微少な移動量を精度良く検出する連続的テンプレートマッチング手法がすでに提案されている.同手法においては,相互相関係数を補間して得られる連続関数のピーク位置推定のために,最急降下法に準じた逐次近似計算を行っている.本論文では,フィードフォワード型ニューラルネットワークを用いてこの部分の計算を行う新たなテンプレートマッチング手法を提案している.また,ピーク位置推定のための演算量が提案手法によって大幅に削減できることを実験的に明らかにしている.
  • Performance Evaluation of Cross-Referencing Template Matching Method, NINOMIYA Daisuke, YAMADA Yoshio, TSUZUKI Shinji, ITE Technical Report, 20030221, In the previous paper, the authors proposed the cross-referencing template matching algorithm wherein displacements (motion vectors) of adjacent templates are taken account into estimating the displacement of current template. This paper discusses a new method for evaluating the robustness of motion estimation algorithm including the cross-referencing template matching algorithm. The proposed method uses test image sequences corrupted by adding white gaussian random noises. Simulation experiments are conducted applying the proposed method to cross-referencing template matching algorithm.
  • Continuous template matching method using neural networks, Yoshio Yamada, Shinji Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 20030101
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  • The Present State and the Future Tasks of In-home Power-Line Communication, TSUZUKI Shinji, IEICE technical report. Communication systems, 20021031, Power-line communications (PLC) are classified into three applications, i.e., Internet access, home-network, and inter-house communications, and those trends in Japan are explained. The experiments of Internet access service by Japanese power utility companies and the activity of HomePlug Powerline Alliance in U.S.A., i.e., high speed PLC using HF frequency band (2M to 30MHz) for home-networking, are introduced. To realize the latter technology in Japan,, it is shown that the deregulation and the solution for the interference to the existing radio stations are needed.
  • Improvement of Transmission Characteristic and Studying of Phantom Transmission at Power Line Channel in Household, INADA Keigo, TSUZUKI Shinji, KAWAKAMI Yasuto, YAMADA Yoshio, Technical report of IEICE. SST, 20021015, Although power-line communication is expected as a promising method to realize an in-home network, one of its difficulties is the wiring scheme, which sometimes affects the signal-attenuation property and sometimes introduces an unnecessary radiation due to the electrical unbalance. These problems may occur, when power-line channels are branched, the length of two signaling-wires is different due to switch circuits, and the conventional layout of ground-wire for outlets with ground connecter is used. In this paper, new wiring schemes are proposed. It is shown that the schemes are effective in improving the transmission characteristic of the power-line channels. Moreover, the scheme allows us to make the phantom transmission available when 3-wires VVF cables are used. The phantom transmission makes the power-line channel-capacity double. Although the electrical unbalance was also improved by the proposed wiring-schemes, their degree was so small. Finally, the suitable balun for the phantom transmission is studied, and the force-balun has achieved a better isolation characteristic when compared to a float-balun.
  • Basic Study for DV Transmission System over IP Network, MITSUEDA Keiichi, TSUZUKI Shinji, HIRAYA Mitsunori, KOIKE Yasuki, YAMADA Yoshio, 情報処理学会研究報告インターネットと運用技術(IOT), 20021010, In this paper, our basic study results of a program, that was developed to transmit high quality video data from a digital video (DV) camera over IP Network in real time, are shown. We propose an algorithm to convert the DV data rate to be slow. It can be used when a packet-loss occurs due to the network congestion. Another algorithm, which can shorten the transmission delay-time, is also proposed. It is realized by dropping the DV frame when the voice is silent in the frame period.
  • Basic Study for DV Transmission System over IP Network, MITSUEDA Keiichi, TSUZUKI Shinji, HIRAYA Mitsunori, KOIKE Yasuki, YAMADA Yoshio, IEICE technical report. Internet Architecture, 20021003, In this paper, our basic study results of a program, that was developed to transmit high quality video data from a digital video (DV) camera over IP Network in real time, are shown. We propose an algorithm to convert the DV data rate to be slow. It can be used when a packet-loss occurs due to the network congestion. Another algorithm, which can shorten the transmission delay-time, is also proposed. It is realized by dropping the DV frame when the voice is silent in the frame period.
  • Measurement System of the BER Performance for the High-Frequency Band Power-Line Communication and its Evaluation, NISHIO Hideyuki, TSUZUKI Shinji, IMAJYO Takashi, YAMADA Yoshio, 電子情報通信学会技術研究報告. ITS, 20020312, The research and development of high-speed power-line communication (PLC), which is about 10Mbps, using the high-frequency (HF) band between 2MHz and 30MHz have become active. Since the channel characteristic and the noise property of the band have not studied well, the computer simulation is not enough to develop the PLC system. The experiment using the practical power-line is also necessary to verify the bit-error-rate (BER) performance. In this paper, the BER measurement system for the HF-band PLC, in which the modulation method and data-bit-rate are programmable, is proposed. Using the system, the improvement of the BER performance due to the impedance matching at the end of VVF cables, which are widely used as indoor power-line cables in Japan, is shown. And the BER performance using the practical power-line of the authors' laboratory is also measured.
  • Effect of Impedance Matching at the End of Residential Power-Line Communication Cable, NISHIO Hideyuki, TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the IEICE General Conference, 20020307
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  • Home network using power-line, Shinji Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 20011201
  • Home Network using Power-line(For Your Information(43)), Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 20011201
  • An Experimental Study of QoS Policy-based Networking Depending on User ID Information, HIRAYA Mitsunori, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, IEICE technical report, 20010711, In the interconnection and inter-operating between networks working for different purposes, it is important to manage the networks based on a policy, that is, how to utilize the networks mutually. In this paper, it is studied how to realize the policy-based network offering a QoS(Quality-of-Service)which depends on the user group. The network is realized by using the dynamic VLAN(Virtual LAN)technology which changes depending on user ID, and the ID is administered by Windows'Active Directory. It is verified whether the desired accuracy of a transmission bandwidth assigned by the QoS policy is performed. Furthermore, it is studied by evaluating the accuracy of the assigned bandwidth by the case where the considering traffic uses TCP or UDP.
  • Continuous Template Matching Method with Consideration for the SNR of Input Images(Special Section Image Processing Technology), Yamada Yoshio, Shinohara Kazunori, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 20010620, 本論文では, 連続的テンプレートマッチング手法における検出精度と所要SN比の関係を実験的に検討している.ここでは, 入力画像およびテンプレート画像に対して, 互いに統計的に独立な白色ガウス雑音が重畳している場合を仮定している.1/4画素相当の検出精度を実現するためには, 42dB程度のSN比が必要であること, 雑音が存在する場合であっても, 入力画像およびテンプレート画像に対する高域遮断は検出精度の劣化をもたらすことを明らかにしている.
  • Continuous template matching method with consideration for the SNR of input images, Y. Yamada, K. Shinohara, S. Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 20010601
  • Indoor Networking using Wireless or Power-line Communication Technology and its Evaluation, TAKAMATSU Takeshi, TSUZUKI Shinji, OKAZAKI Motoki, YAMADA Yoshio, IEICE technical report. Communication systems, 20010419, In recent years, wireless-LAN-based indoor communications draw attention due to their high-speed performance. However, in practice, the area where the wireless-LAN can cover is limited because of obstacles such as walls. On the other hand, the transmission rate of power-line communication is lower than that of wireless-LAN, but relatively wider range can be covered. In this paper, the coverage area of the wireless-LAN and power-line-LAN and their effective transmission rate are measured in indoor environments, i.e., an elementary school and a wooden house.
  • A Study on Impedance Modeling of Electrical Household Appliances at High Frequency Band, TUZUKI Shinji, YAMAMOTO Sinji, YAMADA Yoshio, Proceedings of the IEICE General Conference, 20010307
  • Detection Accuracy of Continuous Template Matching Method with Spline Interpolation, YAMADA Yoshio, MIZUKANE Masashi, TSUZUKI Shinji, ITE Technical Report, 20010302, In the continuous template matcing method, adopting the bilinear interpolation model in the waveform domainleads to the interpolation of cross correlation coefficients with the third order B-spline function. This paper presents the relationship between the accuracy of displacement detection and required Signal-to-Noise Ratio (SNR) in the contiuous template matching method with the first to 10-th order B-spline interpolation models.
  • A Method for Peak Position Estimation of Cross Correlation Functions Using Neural Network, KATAYAMA Erika, YAMADA Yoshio, TSUZUKI Shinji, ITE Technical Report, 20010302, The continuous template matching method have been proposed in the previous papers in order to realize the precision subpixel displacement detection between subsequent frames of motion pictures. In the proposed method, a successive approximation algorithm adopting partial derivatives was used for maximizing the interpolated cross correlation functions. The authors suggested that using partial derivatives leads to some weakness in the search of the maxima. In this paper, a nueral network based maximization (peak detection) algorithm is proposed in order to resolve the above mentioned fragileness.
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  • Problems on power-line communications to realize high-speed versions, TSUZUKI Shinji, Technical report of IEICE. SST, 20001208, Owing to the progress of digitization of multimedia information handled in home, networking in home(referred to as home networks), which includes networks to control houschold appliances. will also progress. Power-line is one of promising channels as the home network, since already-installed line can be used, i.e., wiring-free. In this paper, problems to realize high-speed power-line communications are discussed.
  • Measurement of characteristic of indoor power-line channel, YAMAMOTO Shinji, TSUZUKI Shinji, YAMADA Yoshio, Technical report of IEICE. SST, 20001208, The digitized information treated in house is increasing rapidly in recent years, so that the demand for home network is also increasing. High-speed power-line communication(PLC)using high-frequency bands is paid attention as a promising method for the home network, because its cabling cost is free. However, its research is not popular in Japan due to the restriction of regulation, i.e., the allowed band is from 10kHz to 450kHz. The channel models of Japanese power-line environments in the high-frequency band have not reported yet. In this paper, the impedance characteristics of household-appliances and power-line channels are measured in the high-frequency band, i.e., from 70kHz to 35MHz. And the transfer function of the channels are also measured and these results are shown.
  • Measurement of Distributed Constants of VVF Cable, TAKAMATSU Takeshi, TSUZUKI Shinji, YAMADA Yoshio, Technical report of IEICE. SST, 20001208, The research and development of high-speed power-line communication(PLC)of several Mbps using the high-frequency band under 30MHz have become active. To realize the high-speed PLC, it is important to know the characteristics of power-line as a communication channel. The power-line channel can be treated as a distributed constant circuit at the high-frequency band. In this paper, the distributed constants of a VVF cable with two wires, which is widely used for the indoor power-line in Japan, are obtained by measuring the relative dielectric constant(ξ_γ)and the dielectric loss-tangent(or dissipation-factor, tanδ).
  • Continuous template matching method based on the minimization of interpolated error surfaces, Yoshio Yamada, Shinji Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 20001201
  • A Study for Inter-networking Based on a QoS Policy(2), KOIKE Yasuki, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, Technical report of IEICE. SSE, 20001019, For networking among networks operating for different purposes, methods of Quality-of-Service(QoS)-policy-based routing are studied and their performances are measured. The policy is realized by routing packets following the given priority, which is based on a requirement of using applications among users. It is experimentally shown by using commercialized routers that guarantee the required bandwidth of packets is guaranteed by establishing a prior class by checking a TOS field in an IP-header. The considered QoS policy was given in this paper, such as which packets should be routed faster when the interconnecting line among networks is congested.
  • Detection Accuracy vs. Required SNR Characteristics in Continuous Template Matching Method, YAMADA Yoshio, SHINOHARA Kazunori, TSUZUKI Shinji, IEICE technical report. Image engineering, 20001017, This paper discusses the relationship between the accuracy of displacement detection and required Signal-to-Noise Ratio(SNR)in continuous template matching method. Here we assume that, as the model of noisy input and template images, the statistically independent, additive white Gaussian sequences are applied to input and template images. It is found experimentally that the SNR of 42dB is required in order to achieve the detection accuracy of 1/4 pixel resolution and the supression of higher frequency component results the degradation of the accuracy of displacement detection.
  • Continuous Template Matching Method Based on the Minimization of Interpolated Error Surfaces, Yamada Yoshio, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 20000820, 連続的テンプレートマッチング手法は, 入力画像-テンプレート画像間の相互相関係数を帯域制限補間することによって, 微少な移動量を精度良く検出する手法である.本論文では, 相互相関係数の代わりに, 2乗誤差および絶対値誤差を用い, これらを帯域制限補間して得られる誤差曲面を最小化することによって移動量を検出する手法について検討している.また, 同手法による移動量の検出精度を明らかにしている.
  • Precision Detection of Motion Vectors by Continuous Template Matching Method, Yamada Yoshio, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 20000420, 本論文では, 連続的テンプレートマッチング手法における種々のパラメータの最適化について検討し, 雑音が存在しない理想的な条件の下での同手法の検出精度の限界を明らかにしている.また, 同手法を双1次補間モデルを用いた場合に適用することによって, 従来から広く用いられている双1次補間を用いたテンプレートマッチングの検出精度を評価し, 帯域制限補間を用いた手法と比較検討している.
  • A Case Study for Power Line Communication Using Multi-carrier Modulation (1), TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the IEICE General Conference, 20000307
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  • Synchronization of voice data on asynchronous networks and its implementation for a VSAT channel gateway, Shinji Tsuzuki, Yoshio Yamada, Saburo Tazaki, Susumu Yoshida, Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi), 20000130, The variation of packet-arrival intervals is one of the problems to be solved in realizing real-time voice communications on asynchronous networks such as the Internet. Although the variation can be absorbed by a receiving buffer, the end-to-end delay increases in proportion to the amount of buffered data. Therefore, the guideline for the receiving buffer's design that considers the trade-off between voice quality and delay is needed. In this paper, the design of the receiving buffer by means of the voice-speed-conversion technique is discussed. According to our scenario, the buffer size was expected to be equivalent to the time length in which the probability distribution function of the packet-arrival intervals was about 95% to 99%. However, it is shown that synchronized voice reproduction can be achieved within a preset delay, which is shorter than the corresponding time to the buffer size. This is achieved by keeping the rate of voice speed conversion within the range of 50% to 150% depending on the variation of the intervals. The proposed method was implemented in the conventional UNIX workstations (WSs) connected to an Ethernet segment. The average voice delay between WSs was 150 to 180 ms and the synchronized voice reproduction was achieved with a standard deviation of 13 to 25 ms. The proposed method is applied to VSAT-satellite-channel gateways to realize the real-time voice communication between the WSs through a VSAT channel.
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  • Next Target of Spread Spectrum Technology : Aoolication of Power Line Communication to Home Network, TSUZUKI Shinji, Systems, control and information, 19991215
  • 1-7 Detection Accuracy of Bilinear Interpolation Model Based Template Matching, YAMADA Yoshio, TUZUKI Shinji, ITE Winter Annual Convention, 19991209
  • Continuous template matching method with band-limited interpolation model, Yoshio Yamada, Shinji Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 19991201
  • Continuous Template Matching Method with Band-limited Interpolation Model, Yamada Yoshio, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 19991020, 本稿では, 2つのディジタル画像の間の移動量を高い分解能でもって検出できる連続的なテンプレートマッチング手法を提案している.ここで, 高分解能の検出とは, 標本化間隔に比べて微少な移動量を精密に検出できる能力を意味している.まず, 1次元信号の場合について, 連続的なテンプレートマッチング手法の定式化が行われ, ついで2次元信号への直接的な拡張が与えられている.また, 前処理としての高域通過フィルタリングが, 連続的テンプレートマッチングの精度を保証するために本質的な重要性を持っていることが具体例によって示されている.
  • 1-4 Effectiveness on TCPR4 Method for Two-Dimensional MTR Trellis Code, TAZAKI Saburo, SUEKANE Takuya, TSUZUKI Shinji, Proceedings of the ... ITE annual convention, 19990823, MTR(maximum transition run)code is highly rated under the recent demand on higher density recording. In this paper, we introduce two-dimensional simplest MTR code with trellis function and investigate the effectiveness of the combination with TCPR4(trellis coded partial response 4) ML and this code, where the simplest means that all of more than three continuous level transition pattern are removed from the write-in waveform. The results show that bit error rate with this combination can hold the superiority over the combination with conventional PRML and this code.
  • A Simple Algorithm for Motion Detection with Affine Transform Model, Yamada Yoshio, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 19990620, 回転や伸縮のような複雑な動きであっても, 回転角度が比較的小さく, かつ伸縮率が1に近い場合には, ブロックマッチングによって「見かけの平行移動ベクトル」を近似的に検出できる.また, このような見かけの平行移動ベクトルの場を観測することによって, 対応するアフィン変換パラメータが検出可能である.本論文では, アフィン変換モデルによって記述されるフレーム間の動きを上述の原理に基づいて簡易に検出するための手法を提案している.
  • Development of 32/33 (0, 10/10) Code used Simple Codirng Rule, TAZAKI Saburo, HARA Naoto, TSUZUKI Sinji, IEICE technical report. Magnetic recording, 19990611, One of ceaseless requiremnents toward recording code is the improvement on the coding rate, η=m/n, where m and n are dataword and codeword lengths, respectively. However, design problems accompany with these trends such that the longer m and n, the more complicate coding rules and coding/decoding circuit structures. In this paper, we solve them by developing a new design method in which every datawords are firstly divided more than three subdatawords and the coding rule is constructed with suitably combining those. As the examples of this method, we design 32/33(0,10/10) code.
  • A Consideration on Quaternary Code for Magneto-Optical Recording System, TAZAKI Saburo, IKEUCHI Muneki, TSUZUKI Shinji, Proceedings of the IEICE General Conference, 19990308
  • Topics on Residential Data Communications by Power Line, TSUZUKI Shinji, TAZAKI Saburo, YAMADA Yoshio, Technical report of IEICE. SAT, 19990219, Owing to the progress of digitization of multimedia information handled in home, networking in home (referred to as home networks), which includes networks to control household appliances, will also progress. In this paper, home networks are divided into two categories of the high-speed backbone network and control network, and the trends of the respective networks are described. As the control network, power line communications (PLCs)are promising. First, the characteristics of residential power lines are explained. Second, spread spectrum modulation is picked out as a suitable technique for the PLCs, and a newly developed spreading sequence is introduced for the modulation. By using the sequence, simple hardware, i. e. , baseband transmission, without complicated carrier modulation will be possible. Moreover, an efficient transmission can be expected since the shape of sequence's signal spectrum can be controlled easily.
  • A Study of Two-Dimensional MTR Trellis Code on the Coding Rate 2/3, TAZAKI Saburo, SUEKANE Takuya, TSUZUKI Shinji, IEICE technical report. Magnetic recording, 19990122, Recently in order to attain higher recording density, MTR codes have actively studied in which three or more consecutive transition patterns of polarity level are forced to eliminate from code sequence. Additionally, two-dimensional codes have a growing interest in the improvement of areal density with the betterment of track density. In this paper we propose an algorithm for designing two-dimensional MTR trellis code which has both merits of MTR and two-dimension, and also a good property of trellis function. A new two-dimensional MTR trellis code having coding rate η=2/3 is developed by using this algorithm and is compared the bit error rate(BER)with an one-dimensional MTR code which has the same coding rate. The result shows that the former code gains about an 7.2dB required S/N advantage over the latter code at the normalized density K=3.0 and BER=10^<-5>.
  • A Consideration on 8/9, 16/17, 24/25 Code used Simple Coding Rule, TAZAKI Saburo, HARA Naoto, TSUZUKI Shinji, IEICE technical report. Magnetic recording, 19990122, One of ceaseless requirements toward recording code is the improvement on the coding rete, η=m/n, where m and n are dataword and codewored lengths, respectively. In fact, η(d, k) constraints of practical codes have been shifted with the manner as 1/2(2, 7)→2/3(1, 7)→8/9(0, 4)→16/17(0, 6), where d and k are the minimum and maximum run lenghts, respectively. However, problems accompany with these shifts such that the longer m and n, the more complicate coding rules and coding/decoding circuit structures. In this paper, we solve these problems by developing a new design technique in which every datawords are firstly divided more than three subdatawords and the coding rule is constructed with suitably combining these subdatawords. As the examples of this method, we design 8/9, 16/17 and 24/25 codes, respectively.
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  • Study on channel utilization and delay performance optimization of carrier sense CDMA protocol, TSUZUKI Shinji, OHTSUKA Shigeki, YAMADA Yoshio, TAZAKI Saburo, IEICE technical report. Image engineering, 19981217, Ethernet is based on the carrier sense multiple access with collision detection (CSMA/CD) protocol. Although this protocol is widely used in local area networks (LANs), it has a problem. The throughput and packet-delay performances degrade rapidly when the offered loads of packets become high. As a solution to the problem, we have proposed a protocol referred to as carrier sense spread spectrum with overload detection (CSSS/OD), which is a direct sequence - code devision multiple access (DS - CDMA) based protocol with a carrier sensing function and changes the spreading factor adaptively depending on network loads to improve the conventional Ethernet's performance. In this paper, we show its optimized performances of the channel utilization and the delay time.
  • A Proposal of continuous Template Matching Method with Band-limited Interpolation Model, Yamada Yoshio, Sawada Natsuki, Tsuzuki Shinji, Tazaki Saburo, IEICE technical report. Image engineering, 19981217, This paper proposes a continuous template matching technique aiming at a high-resolution detection of displacements between two digital images, wherein the high-resolution detection means the ability to detect very small displacement as compared with sampling period. Several key equations are developed and discussed for the continuous template matching methods with the band-limited interpolation model and bi-linear interpolation model. It is also discussed that the pre-filtering using HPF is essential for ensuring the precision of the continuous template matching method.
  • Two-Dimensional Coding for The Perpendicular with MR head and Double Layered Medium, TAZAKI Saburo, OOBAYASHI Hiroaki, ODA Yoshimasa, TSUZUKI Sihji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 19981210, This paper proposes a new model of approximated function under the fidelity to the read-back waveform on perpendicular magnetic recording using MR head and double layered medium and compares the performance with the conventional model with integlation format of Lorentzian function at higher density storage. We apply two recording codes for the performance comparison of both models : classical 2/3(1, 7)code and 5/4(2, k_y=4;L=3)code where L means the number of multi-track. As to 2/3(1, 7)code, our proposed model shows a little superiority to conventional model with required SN ratio at BER=10^<-5>. However, as for 5/4(2, 4;3)code, the difference on the performance between both models isn't clear even though their required SN ratio at BER=10^<-5> is better about 5dB than those of 2/3(1, 7)code.
  • Construction of Quaternary Code for Magneto-Optical Recording System using Double-layer Media, TAZAKI Saburo, IKEUCHI Muneki, TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the ... ITE annual convention, 19981029, The use of multi-layer media has been expected to improve linear recording density on magneto-optical (MO) system. However, the conventional technique for MO system using double-layer media is obliged to bring the large change of magnetic field with the transition on recording level. This paper proposes a new method how to construct a quaternary code for it in which we can deal successfully with such problem.
  • Function Model of Readback Waveform for Perpendicular Magnetic Recording using Double Layer Media with MR head, TAZAKI Saburo, OOBAYASHI Hiroaki, TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the ... ITE annual convention, 19981029, It is well known that the readback waveform of perpendicular magnetic recording system using double layer media with MR head closely resembles the write-in waveform in shape like optical recording system. In this paper, we examine to model explicity readback waveform by mathmatical function from the aspect of both time and frequency domains.
  • Bit Error Rate Comparison of Two-Dimensional Codes considering the Rate Improvement of Tracks, TAZAKI Saburo, ODA Yoshimasa, TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the ... ITE annual convention, 19981029, The two-dimensional code has fundamentally an ability of improvement on the rate of track(η_r) beyond 1.0. In this paper, we have developed the codes with large η_r, and compared bit error rate with the conventional 1/2(2,7)RLL code. The results show the superiority of the two-dimensional codes to the one-dimensional codes like 1/2(2,7)RLL code at high linear density.
  • A Proposal on 24/25 (0,8) Code, Tazaki Saburo, Ogata Kenji, Kozai Hideyuki, Tsuzuki Shinji, Yamada Yoshio, Proceedings of the ... ITE annual convention, 19981029, A new code which is called 24/25(0,8) code with κ-constraint (κ=8) is presented. This code can be improved the code rate property over both the conventional 8/9(0,4/4) code and 16/17(0,6/6) code. In order to construct this code, we develop an simple, but effective idea on which each data word is divided into several sub-words having the same length, and then they are converted into the corresponding partial-codewords, respectively.
  • Required SNR Comparison of TCPR(1,1) System and TCPR(1,-1) System, TAZAKI Saburo, SUEKANE Takuya, TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the ... ITE annual convention, 19981029, TCPR(Trellis coded partial response) system is well known a fundamental idea for improving code gain deseribed by minimum free Euclidean distance. In this paper, we firstly study required SNR characteristics of both TCPR(1,1) and TCPR(1,-1) systems on the code rate η=4/5 and bit error rate BER=10^<g;-5>. The simulation results show the superiority of TCPR(1,1) system. Secondarily, we investigate the dependency of the code rate on TCRP(1,1) system and confirm that the trend becomes remarkably at the normalized linear density K〓2.4.
  • A Proposal of Stream Data Gateway with Carrier Sense Multi-rate CDMA Protocol, TSUZUKI Shinji, OHTSUKA Shigeki, YAMADA Yoshio, TAZAKI Saburo, Technical report of IEICE. SAT, 19980619, Ethernet is based on CSMA/CD(Carrier Sense Multiple Access with Collision Detection)protocol. Although this protocol is widely used in local area networks(LANs), it has a problem. The throughput and packet-delay performances degrade rapidly when the offered loads of packets become high. As a solution to the problem, we have proposed CSSS/OD(Carrier Sense Spread Spectrum with Overload Detection)protocol, which is a DS/CDMA(Direct Sequence/Code Devision Multiple Access)based protocol with a carrier sensing function and changes the spreading factor adaptively depending on network loads to improve the conventional Ethernet's performance. In this paper, we propose a stream data gateway as its application, and show its preliminarily examined performances. The gateway is assumed to relay stream data such as voice and video from their servers in the Internet to a 10BASE2-Ethernet segment where clients are connected.
  • Continuous Template Matching with Bilinear Interpolation Filter, YAMADA Yoshio, TSUZUKI Shinji, TAZAKI Saburo, Proceedings of the IEICE General Conference, 19980306
  • A Study of CSMA/CD-CSSS/OD Switching Protocol's Implementation, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, Proceedings of the IEICE General Conference, 19980306
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  • Example of a two-dimensional code satisfying the relationship kURL(マイポータルリンク)(英)
  • Modified antisymmetric M sequence and its periodic correlation property, Shinji Tsuzuki, Susumu Yoshida, Saburo Tazaki, Yoshio Yamada, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 19971201, In this paper we discuss the binary spreading sequences whose spectral distributions are DC free and spectral distribution's shapes can be easily controlled by a certain parameter denoted by 6. The newly developed sequences, referred to as modified antisymmetric M-sequences, are modified-versions of the conventional antisymmetric (AS) M-sequences. The proposed sequences are designed to increase the varieties of spectral distribution's shapes and improve the correlation properties when compared to those of the FM coded M-sequences which have already proposed by Tsuzuki et al. Some typical line coded M-sequences, i.e. the (differential) Manchester coded M-sequences and the FM coded M-sequences, and the conventional AS M-sequences are included in the set of proposed sequences. The improvement of the average BER (bit error rate) performance for asynchronous DS/SSMA (direct sequence/spread spectrum multiple access) systems using the proposed sequences in comparison to the system using the conventional AO/LSE (auto-optimal phase with least sidelobe energy) M-sequences is also shown.
  • Synchronization of Voice Data on Asynchronous Networks and its Implementation for a VSAT Channel Router, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, YOSHIDA Susumu, The Transactions of the Institute of Electrical Engineers of Japan. C, 19971100
  • Improvement on the Storage Complexity in Two-Step Nearest Neighbor Search Algorithm, YAMADA Yoshio, NAGAHAMA Hidenori, TSUZUKI Shinji, TAZAKI Saburo, Proceedings of the Society Conference of IEICE, 19970813, スカラ量子化器を前置量子化器として用いた2段階探索手法においては, 前段のスカラ量子化によって, 最近傍となり得る候補の符号語の集合を絞り込む. これによって, 後段の最近傍探索の計算効率が著しく向上するが, 候補符号語のインデックスを記憶しておくための表が必要となる. 本稿では, 演算量を犠牲にすることなく, インデックス表の大きさを削減するための手法を提案する.
  • Precision Template Matching with Band-limited Interpolation Model, YAMADA Yoshio, TSUZUKI Shinji, TAZAKI Saburo, Proceedings of the ... ITE annual convention, 19970729, This paper proposes a new technique for precision template matching, wherein the translations between the input image and the template are detected with fractional pixel resolution. Assuming the band-limited interpolation model, several equations and their approximations are derived for one- and two-dimensional template matching cases.
  • A proposal of a carrier sensing SSMA protocol working complementarily to Ethernet, TSUZUKI Shinji, OHTSUKA Shigeki, YAMADA Yoshio, TAZAKI Saburo, IEICE technical report. Information theory, 19970725, Ethernet is based on the CSMA/CD (Carrier Sense Multiple Access with Collision Detection) protocol. Although it is widely used in local area networks, this protocol has a problem, such that the throughput and packet delay performances degrade rapidly when the offered loads of packets become high. As a solution to the problem, we propose the CSSS/OD (Carrier Sense Spread Spectrum with Overload Detection) protocol which works complementarily to CSMA/CD protocol. Although SSMA (Spread Spectrum Multiple Access) is often applied in wireless network environments due to its superior frequency utilization, we study here the possibility of applying the SSMA to wired computer network environments. We adopted the non-persistent CSMA/CD protocol as the conventional protocol, and compared both protocols' performances. As the result, we conclude to propose a hybrid accessing protocol, that is, the CSMA/CD protocol is used during the offered loads of packets being low, but the protocol is switched to CSSS/OD protocol during the offered loads being high.
  • Satellite Communications Experiments by Universities, 高畑 文雄, 小野里 好邦, 嶋本 薫, 初田 健, 三橋 龍一, 青木 由直, 棚橋 真, 村井 純, 佐藤 亨, 木村 磐根, 藤崎 清孝, 大迫 陽二, 立居場 光生, 都築 伸二, 田崎 三郎, 岡 育生, 藤原 値賀人, 越後 宏, 康 健, 大沼 孝一, 佐藤 利三郎, The Journal of the Institute of Electronics, Information, and Communication Engineers, 19970525, 衛星の高機能化,無線周波数帯Kuバンドの使用,地球局設備の小型化・低廉化,電気通信事業法の改正に伴う民間企業の衛星通信ビジネスの参入などによって, 衛星通信に関する大学独自の実験・研究が可能になったことをふまえ, 大学を中心とした多数の教育機関と電気通信事業者からなる組織化された研究・実験機関である「ディジタル衛星通信の大学間高度共同利用研究協議会」を設立した. 本報告では, 上記協議会について概説した後, 協議会のもとで衛星を介して実施されている主要な実験・研究として, マルチメディア衛星通信, 北海道統合通信網, 知的通信による手話画像伝送, インターネットアーキテクチャにおける衛星通信の利用などを取り上げて, その内容を紹介する.
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  • Precision Template Matching with Bilinear Interpolation Model, YAMADA Yoshio, TAZAKI Saburo, TSUZUKI Shinji, Proceedings of the IEICE General Conference, 19970306, 動画像の符号化や信号処理を効率よく実現するためには, フレーム間の動き情報を高い精度で検出することが鍵となる. 画像符号化においては, テンプレート・マッチングに基づいた動き検出/補償手法がよく用いられている. この場合, 補間画像を用いてテンプレート・マッチングを行うことによって, 動きベクトルの検出精度を大幅に改善することが可能である. また, すでに筆者らは, テンプレート・マッチングによって検出される動きベクトルの局所的な変化から, アフィン変換モデルに基づく回転や伸縮などの動きパラメータを簡単な計算によって導出する手法を提案しているが, 同手法においても動きベクトルの検出精度が向上すれば, 回転および伸縮パラメータの検出精度も改善される. そこで本稿では, 補間画像を直接生成すること無く, より高精度のテンプレート・マッチングを実現する手法を提案する.
  • Simplified Anchor Pint Method for Fast Nearest Neighbor Search Algorithm, YAMADA Yoshio, ISHIDA Mitsunobu, Tsuzuki Shinji, TAZAKI Saburo, IEICE technical report. Circuits and systems, 19970124, Huang et al. proposed a fast nearest algorithm in which, based on the triangle inequality, candidate codewords are examined using inter-codeword distance table. Their method requires a large distance table propotional to N(N-1)/2, where N denotes codebook size. Ramasubramanian et al. proposed the anchor point method that improves the memory complexity of Huang's method. This paper propose a simplified anchor point method in order to reduce the overhead of candidate selection, thus computational complexity, in Ramasubramanian's anchor point method.
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  • Construction of a Two-Dimensional Code with k < d Property, TAZAKI Saburo, ODA Yoshimasa, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 19961213, One of the major merits that binary two-dimensional codes have over the binary one dimensional codes is the achievement of the property k < d. In this paper, we constructed a practical two-dimensional code based on the Marcellin-Weber's method and derived its state transition diagram. The constraints used in the construction are such that, the track numbers L = 2, k(= k_y) = 1, and d = 2. Additionally, under the same constraints d and k_y, we clearly showed that when L is increased, the property nURL(マイポータルリンク)(英)
  • Performance comparison among several ternary and binary codes, TAZAKI Saburo, MOURI Hiroki, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 19961213, In order to accelerate the achievement of high density recording on magneto-optical disk systems, We have developed a new ternary-level recording code called the 8B6T code which is characterises by the constraints d=1, k=4 and c=2. We have also investigated the BER performance of different combinations between recording codes and PRML methods. The performance of the 8B6T code's required CN ratio has been compared with that of the 8B6T, 8B10B and 4B3T codes, respectively. The results show that, the combination between 8B6T code and PR(1, 2, 1) method has the best performance among several combinations.
  • A Consideration on Coordinated Property of Recording Code and Signal Processing Method, TAZAKI Saburo, YANAGIHARA Kenji, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 19961213, Conventionally, the main function of recording codes has been thought to be matching the property of a signal sequence to that of the recording channel. In this paper, we try to use effectively not only the correlation property of PR systems but also that of recording codes. This idea is truly consistent with the TCPR (Trellis Coded Partial Response) method. Firstly, trellis codes which have code efficiency η = 1/2 and 3/4, respectively, have been constructed. Then, a bit error rate (BER) comparison between these coded PR(1,1)ML methods and the non-coded PR(1,1)ML method having η = 1 is given. The results show that the trellis coded method does improve the BER.
  • Experiment of Power Line DS/SS Data Transmission using an IFM-V9 coded OL-PN sequence, OKITA Toru, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, Technical report of IEICE. SST, 19961213, We have already proposed a spreading sequence, referred to as an IFM-V9 coded OL-PN (Overlapped PN) sequence, that is suitable for baseband DS/SSMA systems. We have considered applying it to power line data transmission systems by computer simulation. Now we are implementing it on the real power line to improve the accuracy of the simulation results, and finished data transmission and despreading functions, where the despreading function is on an of-line system. In this paper, the results of those functions are reported. And furthermore, we implemented FSK based modems using a commercial IC specialized for power line, and examined bit error performances. The results are also reported, aimed to compare the performance of DS/SS systems with that of FSK systems in the future.
  • BER performance of baseband DS/SSMA using FM coded M sequences in bandwidth limited channels, Shinji Tsuzuki, Saburo Tazaki, Yoshio Yamada, IEEE International Symposium on Spread Spectrum Techniques & Applications, 19961201, We discuss the bit error rate (BER) performance of asynchronous baseband DS/SSMA systems using line coded M sequences. As the line codes, we adopt FM family codes that provide M sequences with the DC free spectrum and good correlation properties. It has been already reported that some combinations of three FM coded M sequences provide a better cross-correlation property than that of the preferred pairs of non-coded M sequences. Since their quantitative evaluation in terms of the BER performance improvement due to the line coding has not been done yet, we considered it in this paper. We first derive an equation for the BER analysis, then compare the BER performance of the FM coded M sequences with that of the non-coded M sequences in two bandwidth limited channels, a band pass and a power line channel. In our scenario, the improvement of the required E b/N 0 is 1 dB and 3 dB, respectively. Furthermore we propose a system using FM coded M sequences of different periods simultaneously. This proposed system of the different periods can achieve the channel efficiency 4/3 times better than a system using non-coded M sequences of the same period, while the required E b/N 0 of both systems is almost the same.
  • An Experimetal Operation of the OTP based Remote User Authentification System, YAMADA Yosio, HAYASHI Hideo, TSUZUKI Shinji, TAZAKI Saburo, IPSJ SIG Notes, 19961114, The current IP protocol does not support the encription of the packets at the network layer. This causes some serious difficulties with respect to the system security when the remote logins are done over the Internet. For this purpose, the One-Time Password (OTP) systems, such as the S/KEY system, are proposed. This paper presents an experimental operation of the OTP system in our laboratry, and also discusses a prototype of the user interface of the Telnet client with a built-in OTP based user authentification session.
  • Performance comparisons of multi-level codes for high density MO recording, S. Yoshino, S. Tazaki, S. Tsuzuki, Y. Yamada, IEEE International Conference on Communications, 19960101, We discuss the performance of the multi-level codes for high density recording on magneto-optical(MO) disks. The performance of multi-level codes is compared with that of run-length limited (RLL) binary codes using the partial response maximum likelihood (PRML) method. The simulations indicate that the multi-level codes have good performances in the range of high density recording and that the PRML method produces little improvement in the performances of the multi-level codes compared with those of binary-level codes.
  • 19960000
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  • A Comparison on the Performance of TCPR and PRML based upon FM Family Codes, TAZAKI Saburo, YANAGIHARA Kenji, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 19951208, Conventionally, the main function of recording codes has been thought to be matching the property of a signal sequence to that of the recording channel. In this paper, we propose to successfully use another function of the recording codes so as to combine them with the Partial Response (PR) method, and hence describe their coding rule by the trellis diagram. We select four FM family codes whose coding rules can be expressed by applying an automation model. As the PR methods, PR(1,1) and PR(1,0,1) have been selected based on previous reports. Simulation results show that an SN ratio improvement of about 6 dB at a bit error rate of 10^<-4> can be obtained over the conventional PRML methods.
  • Effectiveness of 13B9T codes for MO Recording Systems, TAZAKI Saburo, MOURI Hiroki, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 19951208, We developed a new robust ternary recording code called a 13B9T code, for increasing the recording density in magneto-optical disks. Like the 4B3T code, it satisfies the c constraint property. It also successfully attains a k constraint property which is not possessed in both the 4B3T and 3B2T code. In terms of bit error rate (BER) characteristics, The coding efficiency of this code is 1.44. Since the 3B2T code combined with PR(1,1) method is regarded as the most attractive combination for MO recording systems bit error rate characteristics, we investigated the BER of our new code (13B9T code) for comparison. Computer simulation results show that the developed 13B9T code combined with the PR(1,2,1) method gives a 1.5dB better CN ratio than the 3B2T code with the PR(1,1) method at BER=10^<-4>.
  • FM family code, Saburo Tazaki, Shinji Tsuzuki, Yoshio Yamada, Conference Record / IEEE Global Telecommunications Conference, 19951201, The FM code is a very famous non-block recording code and has already become popular at the dawn of digital magnetic recording. This code still remains available due to the advent of effective signal processing methods such as PRML(Partial Response Maximum Likelihood) up to the recent extremely high density recording age. In this paper we try to develop a systematic and comprehensive investigation of FM family codes.
  • Multiple access performance of differential DS/SS systems for power line data transmission, Shinji Tsuzuki, Kazuki Mizumoto, Saburo Tazaki, Yoshio Yamada, Conference Record / IEEE Global Telecommunications Conference, 19951201, Spread spectrum (SS) techniques embedded with the differential decoding method is suitable for the power line data transmissions which have to overcome high noise levels, and uncertain and rapid varying transfer functions. We have proposed a coded PN sequence, which makes it possible to combine maximum-likelihood (ML) decoding techniques with the differential detection method on the receiver's side. In this paper, we compare the cochannel interference and the bit error rate performances of our proposed SSMA (Spread Spectrum Multiple Access) method with those of an already known SS system employing only differential decoding.
  • A Consideration On Two-step Nearest Neighbor Search Algorithm, YAMADA Yoshio, ISHIDA Mitsunobu, TSUZUKI Shinji, TAZAKI Saburo, IEICE technical report. Information theory, 19951106, This paper presents the basic theory of the two-step nearest neighbor search algorithm. At the first stage of the proposed algorithm, the prequantizer is used for locating or spotlighting the range of possible codewords to be the nearest neighbor one. These spotlit codewords are referred to as the candidate codewords. Once the candidate codewords are located, the embeded nearest neighbor search quantizer examines all the candidates to find the nearest neighbor codeword at the second stage. The theorem given and proved in this paper guarantees that the nearest neighbor codeword is just within the candidate codewords.
  • On Vector Quantization with Weighted Distortion Measure in Subband Image Coding, FUKUNAGA Tetsuya, YAMADA Yoshio, TSUZUKIt Shinji, TAZAKI Saburo, IEICE technical report. Information theory, 19951106, In subband coding, the input signal is decomposed into 16 subbands through analysis filter bank which forms a parallel set of analysis filters. Each subbanded signal is then downsampled, and a vector which consists of 16 subband elements is quantized by the vector quantizer with the weighted distortion measure which is weighted by each power of the impluse response of synthesis filter bank. We show that the mount of quantization noise of the reconstructed image on each subband is different. Such that the noise power of the lower subband is generally larger than that of higher subband. By simulation, we show that the weighted scheme proposed provides approximately 1[dB] improvement over the non-weighted scheme within range 1/2[bits/pixel] to 3/4[bits/pixel].
  • A traffic Analysis of a Spread Unslotted Aloha system with the Trunk Reservation method, Tsuzuki Shinji, Nakayama Yuichi, Yamada Yoshio, Tazaki Saburo, Technical report of IEICE. SST, 19950921, In this paper, the traffic properties in a spread unslotted ALOHA system with a fixed packet length embedded with the trunk reservation method is analyzed for multimedia communications in a CDMA distributed local area network environment. The analyzed system model employs a protocol with a monitoring function of the number of simultaneous users and two level transmission priorities. We extend the analysis method for a spread unslotted ALOHA system with a fixed packet length proposed by Yamazato et al. [SST94-98] in the model existing two different priorities' users. The analyzed results shows that we can control the throughput and delay performance by setting the proper threshold values of simultaneous users according to their respective priorities.
  • Periodic correlation properties of FM coded M sequences having DC free spectrum, Shinji Tsuzuki, Shunsaku Oskai, Saburo Tazaki, Yoshio Yamada, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 19950901, The periodic correlation properties of M sequences coded by channel codes are discussed. As for the channel codes, the Manchester code and the eight DC free codes in the FM family codes, which include the conventional FM code and the differential Manchester code, are adopted. The M sequences coded by the DC free codes in the FM family codes are referred to as FM coded M sequences. The periodic correlation properties of all combinations of the FM coded M sequences are checked, and the combinations which can provide almost the same or better properties as compared with those of the preferred pairs of M sequences are described. An example of code design using the FM coded M sequences for asynchronous direct sequence/spread spectrum multiple access systems is also discussed.
  • Throughput analysis of slotted non-persistent and one-persistent CSSS/OD (carrier sense spread spectrum with overload detection) protocols, Francis N. Mumba, Shinji Tsuzuki, Yoshio Yamada, Saburo Tazaki, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 19950901, The throughput performance of the non-persistent carrier sense spread spectrum with overload detection (NP-CSSS/OD) protocol is analysed and compared with that of the conventional non-persistent and one-persistent carrier sense multiple access with collision detection (NP-CSMA/CD and 1P-CSMA/CD) and the one-persistent carrier sense spread spectrum with overload detection (1P-CSSS/OD) protocols. We also introduced utilization measurements and did some performance comparisons between these protocols. At high offered loads, the NP-CSSS/OD protocol is found to offer the best throughput and utilization performances amongst them.
  • A Study for Spectral Control Code, TAZAKI Saburo, MATSUDA Hidekazu, TSUZUKI Shinji, YAMADA Yoshio, テレビジョン学会年次大会講演予稿集, 19950726, The codes called"spectral control codes"are very attractive for the designers on both transmission and recording systems. This paper discusses the fundamental properties with which they have to be satisfied. Some typical examples are shown in the figure of power spectral density.
  • A Consideration on the Application of Trellis Coded Modulation to the Magnetic Recording, TAZAKI Saburo, YANAGIHARA Kenji, TSUZUKI Shinji, YAMADA Yoshio, テレビジョン学会年次大会講演予稿集, 19950726, Recentrly, the applications of TCM to Magnetic Recording have been discussed vigorously. Here we examine the TCM-8PSK system using a differential Lorentzian property as a magnetic channel model. A synchronous detector and a Viterbi decoder are used. The simulation result shows the validity of this system for high density recording.
  • 19950520
  • Properties of Two-Demensional Codes and an Example Code, Tazaki Saburo, Hamamoto Kazutoshi, Tsuzuki Sinji, Yamada Yoshio, IEICE technical report. Magnetic recording, 19950519, The two-dimensional code has lately attracted considerable attention as a novel technology to not only magnetic recording systems, but also optical recoding systems for improving drastically areal density. This paper investigates the improved properties of this code such as k-constraint and minimum Hamming distance. We propose (d_x=1, k_x=4, k_y=2 ; m=2, n=5 ; L=2) code by additionally using trellis method.
  • Periodic Correlation Properties of Channel Coded M Sequences having DC free spectrum, TSUZUKI S., OSAKI S., TAZAKI S., YAMADA Y., Proceedings of the IEICE General Conference, 19950327, 直接拡散によるスペクトル拡散通信において、PN系列を伝送符号化すれば伝送路の伝達関数に対してスペクトルマッチングを行うことができるため,電力損失を軽減できる.このときの受信側での復合法として,伝送符号を復合したのち逆拡散処理を行う方法と,伝送符号化したPN系列のまま逆拡散処理を行う方法とが考えられる.伝送符号化としてもなお,PN系列が良好な相関特性を維持できるのであれば,後者の方がより高い拡散比のまま逆拡散処理を行なえるため,ビット誤り率の点で有利であると考えられる。筆者らは以前,FMファミリー符号のなかでDCフリー特性を有するFM5,FMV6(いわゆるFM符号),FMV9,FMV10,IFMV5,IFMV6(差動マンチェスタ符号),IFMV9及びIFMBV10符号にて符号化したM系列(以下,FM符号化M系列と呼ぶ)のなかに,偶相互相関が0となる系列の組み合せがあることについて報告した.さらに一部の組合せについては,偶及び奇相互相関の分散および最悪値について報告した.本稿では,に示した結果を踏まえ,FM符号化系列を用いた多元接続システムでの最大接続局数を考察する。
  • Rosary type search method for marging state on Viterbi detection, Yoshino S., Tazaki S., Tsuzuki S., Yamada Y., Proceedings of the IEICE General Conference, 19950327, 最近、高密度ディジタル記録においてビタビ検出技術は、PR(Partial Responce)技術と結びついて重要な役割を果たしている。このビタビ検出での問題点は、ACS操作の複雑さと、トレリス線図上の生き残りバスを遡りマージ状態を探索するために多くの処理時間が費やされることである。本稿では、バス形状マトリクスを使用した代数的探索法のバス形状マトリックスをロザリオ型に変更することで、より単純で高速化が可能な探索法を得たので提案する。
  • 19950000
  • 19950000
  • A reliable signal detection method for the combination of PRML method and ternary recording code, S. Tazaki, T. Takashima, S. Tsuzuki, Y. Yamada, IEEE International Symposium on Information Theory - Proceedings, 19941201, We focus our attention on a method for finding the merging state after the ACS (add compare select) operation in a Viterbi algorithm combined with the PR method and the ternary recording system. Firstly, the path shape matrix method is introduced with algebraic lucidity. Secondly, we propose a "rosary" style method that is far much simpler than the path shape matrix method. ? 1994 IEEE.
  • Reliable signal detection method for the combination of PRML method and ternary recording code, S. Tazaki, T. Takashima, S. Tsuzuki, Y. Yamada, IEEE International Symposium on Information Theory - Proceedings, 19941201, We focus our attention on a method for finding the merging state after the ACS (add compare select) operation in a Viterbi algorithm combined with the PR method and the ternary recording system. Firstly, the path shape matrix method is introduced with algebraic lucidity. Secondly, we propose a 'rosary' style method that is far much simpler than the path shape matrix method.
  • Survey of BER improvement on FM family code, S. Tazaki, T. Koyama, M. Pinandito, Y. Yamada, S. Tsuzuki, National Conference Publication - Institution of Engineers, Australia, 19941201, Veillard suggests that a higher code rate for the selection of a recording code in order to attain the demand of higher storage density is not a necessary condition to fulfill as far as the FM code is concerned. This paper investigates firstly the common features of FM family codes which can be expected to attain the demand of higher storage density in spite of their low code rates. We find that four codes with the FM code (FM-V6) included, hold true on that demand and examined their bit error rate performance. The results show that FM-V14 code has the best SNR performance among them.
  • Error correction using IFMV9 coded overlapped PN sequence for power line SSMA, Shinji Tsuzuki, Kazuki Mizumoto, Saburo Tazaki, Yoshio Yamada, IEEE International Symposium on Spread Spectrum Techniques & Applications, 19941201, We propose an IFMV9 coded OL(overlapped)-PN sequence as a PN sequence that is suitable for DS/SS data transmission with low spreading factor through a power line channel. The IFMV9 coded OL-PN sequence is a data stream coded according to the coding rule of IFMV9, that is one of the channel codes, in every unit period length of a PN sequence. It can provide DC free and correlation properties. This coded sequence also makes it possible to combine maximum-likelihood (ML) decoding techniques with the well-known differential decoding method at the receiver's side. We investigate the error rate characteristics and the possible maximum number of simultaneous users by computer simulation. We use a model of television of which a power circuit impedance alternates rapidly and greatly, as the simulated channel. The simulated result shows the error rate improvement due to the combination of ML decoding and differential decoding at the receiving end.
  • Mathematical morphology which decomposes image and filter by gray scale value in advance, Mizuki Hiromasa, Yamada Yoshio, Yamamoto Shoshi, Tsuzuki Shinji, Tazaki Saburo, IEICE technical report. Image engineering, 19941108, Motion estimation is one of the important technology for signal processing in moving picture coding."Appearance of parallel motion " which is inspected by block matching method contains information of rotation,expansion and contraction as well.Authors propose an estimation method basing on Helmert's transformation with using the "appearance of parallel motion".This paper explains both logical and experimental review of estimation precision for the "appearance of parallel motion".
  • Estimation precision of appearance of parallel motion in moving picture sequence with rotation, expansion and contraction, Mizuki Hiromasa, Yamada Yosio, Yamamoto Shoshi, Tsuzuki Shinji, Tazaki Saburo, ITEJ Technical Report, 19941108, Motion estimation is one of the important technology for signal processing in moving picture coding. "Appearance of parallel motion" which is inspected by block matching method contains information of rotation, expansion and contraction as well. Authors propose an estimation method basing on Helmert's transformation with using the "appearance of parallel motion". This paper explains both logical and experimental review of estimation precision for the "appearance of parallel motion".
  • A Study of Band Allocation Method for CDMA Distributed Network, Tsuzuki Shinji, Nagaoka Teruo, Tazaki Saburo, Yamada Yoshio, Technical report of IEICE. SST, 19940826, In this paper,for multimedia communication in a CDMA based distributed local area network environment,a protocol with a monitoring function of the simultaneous user number and two level transmission priorities is proposed.The protocol,referred to as CDMA, PS,assigns a prior bandwidth to stations sending the isochronous information.The monitoring function suppresses the lower priority station′s transmission under congestion situations. Its computer simulated performance is also presented here.The simulated results show that lower priority stations can send packets as much as they can while keeping the prior bandwidth during the congestion situations.The obtained effective total throughput,which excludes the protocol overhead,is 0.56.
  • A study of fast adaptive equalization algorithms for power line transmission channel, Tsuzuki Shinji, Utsumi Junichi, Tazaki Saburo, Yamada Yoshio, IEICE technical report. Information theory, 19940517, In this paper,the introduction of adaptive equalizer is discussed as a way of signal processing on the receiver side of power line spread spectrum(SS)communication systems.The adaptive equalizer reconstructs approximately signal waveforms on the transmitter side by estimating a reverse transfer function.As adaptive algorithms,we adopt Least Mean Square(LMS)algorithm and Recursive Least Square(RLS)algorithm,and we carry out the comparison about performauce between them.The computer simulation shows that RLS algorithm is performed better than LMS algorithm in a convergence property,but at the same time is needed much more numbers of calculation than LMS algorithm.
  • A performance evaluation of Two-step nearest neighbor search algorithm with coarse preguantization, Yamada Yoshio, Sakashita Satoru, Tazaki Saburo, Tsuzuki Shinji, IEICE technical report. Information theory, 19940516, We propose a new coding algorithm of VQ in order to improve a search complexity and name it a two-step nearest neighbor search algorithm.Our fundamental premise is not to make degradation of quantizing quality compared with FSVQ.The method that a coarse prequantizer is applied to a partial space of the information source has been already reported.Here,we try to expand it into a whole space of the information source.By optimizating the partition range of the information source,we verify the effectiveness of our method.As a result,it is found that our method can be reduce a search complexity compared with TSVQ,but is oblised to increase a storage complexity.
  • Evaluation of Parameters Related to Japanese Vowel Recognition By HMM, Tazaki Saburo, Sushil Kumar, Nagashima Teruo, Tsuzuki Shinji, Yamada Yoshio, IEICE technical report. Information theory, 19940516, Parameterization of the speech signal is the important step in the speech recognition process.Several popular signal analysis algorithms have emerged,which are intended to produce a parametric representation of the speech signal:parameters that capture spectral dynamics or changes of the spectrum with time.Current approaches to speech recognition are primarily concerned with modeling the vocal tract characteristics and for relevant reason cepstral parameters derived either from Fourier transform or linear prediction techniques enjoy widespread use in speeh recognition field.Alike cepstral parameters,formant frequencies can also be considered as meaningful parameters for recognition purpose.To investigate its capability some recognition tests have been performed with the formant paraineters,the cepstral parameters,and concatenated cepstral & formant parameters in different experimental conditions.Evaluation of these parameters in the case of HMM based Japanese vowel sound recognition is the main purpose of this paper.
  • Performance comparisons of recording codes based on sampled servo format, S. Tazaki, M. Noguchi, S. Yoshino, S. Tsuzuki, Y. Yamada, Conference Record - International Conference on Communications, 19940101, We discuss the performance of recording codes with several signal processing methods at the reading process for a system based on a sampled servo format. Bit error rates for differential detection and PRML methods with the 4/15 and 4/11 codes are investigated, respectively. The performance of these codes are compared with the (2,7) and (1,7)RLL codes which are designed for a continuous servo format. The simulations indicate that the 4/11 code with PRML method can compete favorably with the (1,7)RLL code with PRML method at a data frequency of 12Mbps.
  • 19940000
  • 19940000
  • 19940000
  • Two-step Nearest Neighbor Search Algorithm with Coarse Prequanization, Yamada Yoshio, Sakashita Satoru, Tazaki Saburo, Tsuzuki Shinji, IEICE technical report. Information theory, 19931215, A coding process of optimal VQ is a nearest neighbor search itself on a multidimensional space.In this paper,we propose a two- step nearest neighbor search algorithm faster than the so far proposed full search algorithms without a loss of performance.Our algorithm first reduces the number of possible candidate vectors using coarse prequantization and EPDS-11 we named.Then it can realize a fast search using the resultant candidate vectors more effectively.When the conditions are given 4£dimension!,8£partitio ns, dimension!and the rate is less than 10£bits/vector!,the simula tion result shows that our proposed method is faster than the tree search algorithm for the memoryless Gaussian source.
  • Detection of Rotation and Scaling Parameters based on Simple Block Matching, Yamada Yoshio, Yamamoto Syoshi, Saburo Tazaki, Tsuzuki Shinji, IEICE technical report. Information theory, 19931215, As an important technique for performing more efficient motion displacement estimation in moving images,several motion compensation methods have already been developed.Block matching method is well known on of them,but basically looks upon as a technique for searching only parallel displacement.Alternatively, affine matching method is also one of them,and can perform not only searching parallel displacement bat also extracting rotation and scaling in the interframe.However,this method fairly needs the processing time of more ten times than block matching method.In this paper,we succeed to verify the effectiveness of the block matching method for detecting rotation and scaling within a few degrees instead of affine matching method.
  • FM coded PN sequences with DC free property and their application to power line SS£1!, Tsuzuki Shinji, Mizumoto Kazuki, Tazaki Saburo, Yamada Yoshio, IEICE technical report. Information theory, 19930525, In this paper,FM coded M sequence with DC free property is discussed as the applicable PN sequence to power line Spread Spectrum(SS)communication system.Our method is motivated by the conventional differential decoding system for power fine SS,the system which sends PE coded PN sequence with its reference sequence.We extend it and add an error correcting ablability to a coded PN sequence.As an application,we code M sequence symbol by symbol following FMV6 coding rule.As another application,we do it sequence by sequence following FMV9 coding rule and apply Viterbi decoding.The result of computer simulation shows the improvement of about 3.5 dB on SNR at bit error rate 10_-4> by using our symbol by symbol coding method compared with the conventional method.In the case of sequence by sequence coding,it shows the improvement of about 9 dB on SNR compared with the conventional method.
  • A Color Image Clustering Method for Minimizing Maximum Distortion, Yamada Yoshio, Sawada Goichi, Tazaki Saburo, Tsuzuki Shinji, IEICE technical report. Information theory, 19930524, The clustering method is widely used and in image processing field it is also one of the important fundermental technique.The clustering technique which minimize the mean value of error with a given error criterion is usually used.Especially MSE minirrjizing clustering is often used because of mathematical expression′s easi ness.However when this MSE minimizing technique is applied to clustering in color-space,it sometimes happens to make a color of which occurrence probability is low belong to quite different color cluster.This reason is that the color-space in which the low occurrence probability color belongs is clustered roughly while the color-space in which the high occurrence probability color belongs is clustered finely.In this paper,we discuss the ablability of the clustering which minimize maximum distortion calculated from l_∞ norm and compare it with the conventional MSE clustering.
  • 19930220
  • 19930000
  • 19930000
  • 19930000
  • 19930000
  • 19930000
  • PRML Method on 4/15 Code and 4/11 Code, TAZAKI Saburo, NOGUCHI Masahito, YAMADA Yoshio, TSUZUKI Shinji, ITEJ Technical Report, 19921112, A 4/15 code and a 4/11 code have been developed in the magneto-optical disc system with sample servo mechanism. We propose the application of PR systems, instead of differentail detection method. We also adopt Viterbi detection method with PR systems as PRML methods. Furthermore, another signal detection method making use of the unique property of the coding rule on 4/15 is proposed in this paper. Bit error rates of our systems are examined by computer simulation and compared with the conventional differential detection. The results show that our proposed systems exhibits excellent performance compared with the conventional one.
  • Bit error rate characteristics Of 3B-2T code and 4B-3T Code, TAZAKI Saburou, TAKASHIMA Takao, YAMADA Yoshio, TSUZUKI Shinji, ITEJ Technical Report, 19921112, In this paper, we have tried to applied several PRML(Partial Response Maximum Likelihood) methods to a 3B-2T code and a 4B-3T code, those of conventional ternary recording codes, and evaluated the performance of bit error-rate for necessary SNR at the reading point by using both techniques on state transition matrix and symbol transition matrix. The results show that PR(1,0,-1)ML method can be made the best performance among several combination of PRML method with a 3B-2T code and a 4B-3T code.
  • Error Characteristics Of FM Family Codes Using PRML, TAZAKI Saburo, PINANDITO Mego, YAMADA Yoshio, TSUZUKI Shinji, ITEJ Technical Report, 19921112, In this paper, we make clear the properties of thirty FM Family codes through the analysis on coding rules. Then the combination of these codes with several PRML methods is investigated with bit error rate by computer simulation. The results show that nine FM Family codes can be performed better SN ratio than conventional FM code at error rate 10^<-4>.
  • Motion estimation of Color moving images using an affine matching, YAMADA Yoshio, MIYAWAKI Hiroyuki, TAZAKI Saburo, TSUZUKI Shinji, ITEJ Technical Report, 19921026, The method of motion displacement estimation of moving images which includes rotation and scaling between frames was developed by C.F.Fuh et al[1]. In this method, shape deformations modeled by affine matching were considered for image matching. But, this algorithm required much more computational time when compared to the conventional block matching algorithm[2] which considered only shifting. In this paper, we show a way of reducing the number of calculations, and we succeeded to reduce the computational time to 7 times that of the conventional block matching algorithm. We also applied our method to color moving images, and an example using Munsell color space is shown.
  • 19920000
  • 19920000
  • 19920000
  • 19890000
  • 19860000
  • 19860000
  • 2236) On the Experimental Study by the R.C. Pile : No. 1, Takahashi Hideaki, 日本建築学会論文報告集. 号外, 学術講演要旨集, 19661000
  • 2237) On the Experimental Study by the R.C. Pile : No. 2, Tsuzuki Shinzi, 日本建築学会論文報告集. 号外, 学術講演要旨集, 19661000
  • Works

    • 20161000
    • 20020000, 20040000
    • 20060000, 20080000
    • 20070000, 20070000
    • 20070000, 20070000
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    • 20090000, 20100000
    • A study on cultural exchange support between the remote elementary schools, 20070000, 20070000

    Misc

    • スマートグリッド・コミュニティに関連するEMC問題 電力線通信(PLC)の研究動向とSmart EMC, 都築伸二, 電磁環境工学情報EMC, 29, 12, 13, 18, 20170400, 0916-2275, http://jglobal.jst.go.jp/public/201702211654337656
    • 20151200
    • センサノードへの給電を目的とした非接触給電用トランスの試作, 金森瑛基, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2014, ROMBUNNO.3-7, 20140912, http://jglobal.jst.go.jp/public/201402207050833572
    • NFC歌留多と熱中症予防アプリへの適用, 音田拓哉, 日野景太, 大野拓也, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2014, ROMBUNNO.12-27, 20140912, http://jglobal.jst.go.jp/public/201402220060391817
    • PVの発電実績データに基づく日射量推定に関する基礎検討, 岡崎勇太, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2014, ROMBUNNO.3-8, 20140912, http://jglobal.jst.go.jp/public/201402263439480915
    • PV出力の多地点同時観測と雲の動きベクトル推定への応用, 鈴木才太, 都築伸二, 阿部幸雄, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2014, ROMBUNNO.3-9, 20140912, http://jglobal.jst.go.jp/public/201402277532762140
    • EV用ガレージ充電システムの試作とその自立度の検討, 大野拓也, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2014, ROMBUNNO.3-3, 20140912, http://jglobal.jst.go.jp/public/201402294789492714
    • 電子百葉箱用太陽電池の簡易MPPT回路の検討, 日野景太, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2014, ROMBUNNO.12-29, 20140912, http://jglobal.jst.go.jp/public/201402295008339220
    • kHz帯PLC用N‐L/N‐PE伝送方式の検討, 吉澤幸晃, 都築伸二, 山田芳郎, 電気学会全国大会講演論文集(CD-ROM), 2014, ROMBUNNO.4-179, 20140305, http://jglobal.jst.go.jp/public/201402201906844602
    • 雲量推定を目的とした太陽光発電の翌日出力予測, 岡崎勇太, 都築伸二, 山田芳郎, 電気学会全国大会講演論文集(CD-ROM), 2014, ROMBUNNO.6-101, 20140305, http://jglobal.jst.go.jp/public/201402218499236830
    • 小中学校に設置するPV/気象センサーネットワークの設計, 鈴木才太, 日野景太, 都築伸二, 山田芳郎, 電気学会全国大会講演論文集(CD-ROM), 2014, ROMBUNNO.4-180, 20140305, http://jglobal.jst.go.jp/public/201402257282363340
    • PVと鉛バッテリーによるEV用ガレージ充電システムの検討, 山口芳久, 都築伸二, 山田芳郎, 電気学会全国大会講演論文集(CD-ROM), 2014, ROMBUNNO.4-182, 20140305, http://jglobal.jst.go.jp/public/201402289092424415
    • One Wire PLC System by Inductive Coupling, 都築伸二, 宇都宮裕之, 松井隆, 山田芳郎, 電子情報通信学会技術研究報告, 113, 275(WBS2013 21-33), 71, 76, 20131024, 0913-5685, http://jglobal.jst.go.jp/public/201302208621628393
    • One Wire PLC System by Inductive Coupling, TSUZUKI Shinji, UTSUNOMIYA Hiroyuki, MATSUI Takashi, YAMADA Yoshio, IEICE technical report. WBS, Wideband System, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. WBS, ワイドバンドシステム, 113, 275, 71, 76, 20131024, 09135685, http://ci.nii.ac.jp/naid/110009784491, The conventional narrowband power-line communication (NB-PLC) is a two-wire system, that has injected its signal between wires with a capacitive coupler. When communicating between floors at a large-sized building, the signal has to travel over long-distances across a switchboard which supplies electricity to distribution boards. Moreover, the signal is attenuated not only at the switchboard but also at distribution boards. Then signal amplifiers have had to be installed at the boards. In this paper, a single wire PLC solution has been proposed to reduce the communication distance and avoid the attenuation by taking a shortcut. It has been described experimentally that the earth could be used as its signal returning path to the signal source. An inductive coupler suitable to this system has been also proposed. The signal attenuation of the proposed system was 30dB better than that of the conventional two-wire system according to our scenario. The achieved performances of PLC modems also showed that the proposed method was useful.
    • PVと鉛バッテリーを備えたEV用ガレージシステムに関する基礎検討, 山口芳久, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2013, ROMBUNNO.3-8, 20130920, http://jglobal.jst.go.jp/public/201302205540211545
    • DC/DCコンバータへのワイヤレス給電用スパイラルコイルの設計, 白川義浩, 半田正樹, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2013, ROMBUNNO.5-9, 20130920, http://jglobal.jst.go.jp/public/201302215860193680
    • テンプレートマッチングによる平行移動ベクトルを用いた回転の検出―低解像度画像における検出精度の評価―, 三木將司, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2013, ROMBUNNO.13-44, 20130920, http://jglobal.jst.go.jp/public/201302217318079661
    • HGW機能を搭載したスマートメータ用マイコン電力計の試作, 鈴木才太, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2013, ROMBUNNO.3-7, 20130920, http://jglobal.jst.go.jp/public/201302228600160910
    • kHz帯PLC用N‐L/N‐PE中継器の検討, 吉澤幸晃, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2013, ROMBUNNO.12-24, 20130920, http://jglobal.jst.go.jp/public/201302250148916986
    • Field Trial Results of N-PE Transmission System for Narrow-Band PLC, 吉澤幸晃, 都築伸二, 山田芳郎, 電子情報通信学会技術研究報告, 113, 114(CS2013 8-27), 47, 52, 20130627, 0913-5685, http://jglobal.jst.go.jp/public/201302235274359074
    • Field Trial Results of N-PE Transmission System for Narrow-Band PLC, YOSHIZAWA Yukiaki, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Communication systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CS, 通信方式, 113, 114, 47, 52, 20130627, 0913-5685, http://ci.nii.ac.jp/naid/110009778397, Signal attenuation is a serious problem of the conventional Narrowband Power-line Communication (NB-PLC) system, which has used neutral and live (N-L) lines. To solve this problem, a new signal transmission system using neutral and protective earth (N-PE) lines has been proposed by the authors, and it had been shown that the system worked well at outlets connected to the same trunk cable. In this paper, the proposed system has been applied to two power-line environments. One was an environment where outlets were connected to different trunk cables. It has been shown that the proposed system achieved 24dB improvement of the attenuation. Another environment was an earth system used in Hawaii which is called TN-S system. It has been shown that the proposed system worked effectively also under the TN-S system.
    • Cooperative Power Generation & Utilization, "Minna-de-Odenki" Project-Implementation of Smart Meter System-, 二宮政浩, 鈴木才太, 佐々木隆志, 都築伸二, 鈴木信, 兼築史季, 早田洋一, 山田芳郎, 情報処理学会研究報告(CD-ROM), 2012, 6, ROMBUNNO.IS-123,NO.3, 20130415, 2186-2583, http://jglobal.jst.go.jp/public/201302260172672430
    • Cooperative Power Generation & Utilization, "Minna-de-Odenki" Project-Implementation of Social Outlet-, 松重雄大, 鈴木才太, 佐々木隆志, 都築伸二, 鈴木信, 兼築史季, 早田洋一, 山田芳郎, 情報処理学会研究報告(CD-ROM), 2012, 6, ROMBUNNO.IS-123,NO.2, 20130415, 2186-2583, http://jglobal.jst.go.jp/public/201302264553292567
    • 2013, 3, 1, 8, 20130308, http://ci.nii.ac.jp/naid/110009551366
    • Cooperative Power Generation & Utilization, "Minna-de-Odenki" Project - Implementation of Social Outlet -, 松重雄大, 鈴木才太, 佐々木隆志, 都築伸二, 鈴木信, 兼築史季, 早田洋一, 山田芳郎, 研究報告情報システムと社会環境(IS), 研究報告情報システムと社会環境(IS), 2013, 2, 1, 6, 20130308, http://ci.nii.ac.jp/naid/110009551365, 「みんなでおでんき」プロジェクトでは,再生可能エネルギーにより発電した電力を,地域やソーシャルコミュニティ内で融通し合うことによって,持続可能な共助システムの構築を目指している.このシステムで必要となる利用者の認証を,本稿では電源コンセントにNFC (near field communication)機能を組み込むことで実現した.非接触ICカードあるいはNFC搭載のスマートフォンをコンセントにかざし,コミュニティメンバーであれば,電気を一定時間使えるようにした.ユーザ登録・管理用のクラウドサービスは,既存のSNS (social networking service)アカウントでもユーザ認証を行えるようにしており,これによりコミュニティ形成の促進をはかっている."Minna-de-Odenki" project aims to utilize electric power generated by renewable energies in regions among social communities, and to build sustainable and cooperative system. In this paper, user authentification of this system has been proposed to use NFC (near field communication) technology. The community members can utilize electricity for a while when they touch an NFC reader embedded in an outlet with a contactless IC card or a smart phone having the NFC function. Services such as user registration and administration by a cloud server can be achieved after an authentication by using existing SNS (social networking service) accounts. The usage of the SNS accounts may accelerate the formation and activities of a community.
    • 2電源2バッテリーシステム用スマート分電盤に関する基礎検討, 山口芳久, 福本未来哉, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2012, ROMBUNNO.3-8, 20120929, http://jglobal.jst.go.jp/public/201202201698801711
    • PV組み込み用簡易通信モデムの基礎検討, 二宮政浩, 宇都宮裕之, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2012, ROMBUNNO.12-5, 20120929, http://jglobal.jst.go.jp/public/201202231313668613
    • PV電力線におけるkHz帯PLC用インダクティブカプラの基礎検討, 宇都宮裕之, 二宮政浩, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2012, ROMBUNNO.12-38, 20120929, http://jglobal.jst.go.jp/public/201202242634326732
    • A Proposal of N-PE Transmission System for Narrow-Band PLC, 吉澤幸晃, 宇都宮裕之, SARI ARENI Intan, 都築伸二, 山田芳郎, 電子情報通信学会技術研究報告, 112, 118(CS2012 23-47), 137, 142, 20120705, 0913-5685, http://jglobal.jst.go.jp/public/201202264360682204
    • A Proposal of N-PE Transmission System for Narrow-Band PLC, YOSHIZAWA Yukiaki, UTSUNOMIYA Hiroyuki, ARENI Intan Sari, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Communication systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CS, 通信方式, 112, 118, 137, 142, 20120705, 0913-5685, http://ci.nii.ac.jp/naid/110009626049, In this paper, a new signal transmission system for Narrow-Band Power-Line Communications (NB-PLC) has been proposed in order to solve the problems of the conventional systems. The serious signal propagation loss was one of the problems for the differential-mode transmission system, which used the Neutral and Live (N-L) conductors. The proposing system does the Neutral and Protective Earth (N-PE) conductors. In order to compare the proposing N-PE transmission system with the N-L system, Packet Error Rate (PER) performances of 144 pairs of wall outlets for AC100V in the authors' laboratory have been measured. Although the 40% outlet pairs could not communicate at all for the N-L system, the ratio was improved to 4% for the proposed system. Moreover, to verify the results of the PER performances, the transfer function and impedance properties of the outlets were measured and the usefulness of the proposal system has been discussed.
    • An Approach of Developing a System to Promote Utilization of Renewable Energy with a Combination of Smart Meter and SNS, 佐々木隆志, 鈴木信, 兼築史季, 早田洋一, 都築伸二, 情報処理学会研究報告(CD-ROM), 2011, 6, ROMBUNNO.IS-119,NO.7, 20120415, 2186-2583, http://jglobal.jst.go.jp/public/201202240167542229
    • An Approach of Developing a System to Promote Utilization of Renewable Energy with a Combination of Smart Meter and SNS, 佐々木隆志, 鈴木信, 兼築史季, 早田洋一, 都築伸二, 研究報告情報システムと社会環境(IS), 研究報告情報システムと社会環境(IS), 2012, 7, 1, 6, 20120308, http://ci.nii.ac.jp/naid/170000070009, 再生可能エネルギーによる発電は発生する廃棄物が少ないこと,商用送電網に依存しない電力の地産地消が可能なため災害への耐性が高いという利点があるが,個人が発電設備を設置するにあたっては行政による補助制度と余剰電力買い取り制度以外の普及促進策が無い.本研究では個人が設置した太陽光発電パネルなどの発電設備からスマートメータにより収集した発電量を SNS 上のソーシャルグラフと位置情報により集計し可視化することで,コミュニティの形成,情報交換,競争などが可能な基盤システムの構築に取り組んでおり,再生可能エネルギーの利活用に対する動機づけや普及促進に繋がると期待している.While renewable energy emits small amount of wastes and deals with disaster achieving local production of energy for local consumption, there is only a few promotion including subsidies and surplus electricity trading when individuals are hoping to purchase such power-generating equipment. Our research aims to improve this situation by reinforcing incentives for renewable energy motivating people with social activities such as sharing information and competition. Our system provides visualization of total amount of generated electrical energy by home solar panels and other devices over social community which is determined by social graphs in SNS and location of devices.
    • 改造電気自動車の試作による課題抽出, 岡本好弘, 仲村泰明, 小野和雄, 大澤壽, 都築伸二, 坂田博, 門脇一則, 神野雅文, 本村英樹, 小林真也, 佐藤員暢, 田所祐史, 石本守, 愛媛大学社会連携推進機構研究成果報告書, 5, 17, 20, 20120300, http://jglobal.jst.go.jp/public/201202254630003546
    • 24, 7, 31, 37, 20111100, 0916-2275, http://ci.nii.ac.jp/naid/40019060779
    • スペクトル拡散音を用いた位置計測, 椎木友朗, 山本一哉, WIDODO Slamet, 近藤直, 小川雄一, 都築伸二, 岡田繁, 農業機械学会年次大会講演要旨, 70th, 238, 239, 20110920, 1347-6467, http://jglobal.jst.go.jp/public/201102270448018005
    • 低インピーダンス電力線用インダクティブPLCカップラの検討, 宇都宮裕之, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2011, ROMBUNNO.12-26, 20110913, http://jglobal.jst.go.jp/public/201102225955664509
    • 設置が容易なワイヤレス給電アンテナの検討, 白川義浩, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2011, ROMBUNNO.12-20, 20110913, http://jglobal.jst.go.jp/public/201102268230009824
    • PLC/VLC/ZigBee通信システムの性能評価, 二宮政浩, 山本武, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2011, ROMBUNNO.12-25, 20110913, http://jglobal.jst.go.jp/public/201102277501923453
    • Development of BPL Systems for Cargo Ships and Some Topics of Smart Meter Based on NB-PLC Technologies-Research Results Sponsored by MIC-SCOPE and Some Topics from IEEE-ISPLC Symposium-, 都築伸二, 電子情報通信学会技術研究報告, 111, 159(WBS2011 10-20), 17, 22, 20110721, 0913-5685, http://jglobal.jst.go.jp/public/201102248187717886
    • Development of BPL Systems for Cargo Ships and Some Topics of Smart Meter Based on NB-PLC Technologies : Research Results Sponsored by MIC-SCOPE and Some Topics from IEEE-ISPLC Symposium, TSUZUKI Shinji, IEICE technical report. WBS, Wideband System, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. WBS, ワイドバンドシステム, 111, 159, 17, 22, 20110721, 09135685, http://ci.nii.ac.jp/naid/110008800253, To solve the problems of the conventional alternating current (AC) electricity distribution system essentially, a high-speed PLC communication system, which target speed is 1Gbps, on cargo ships has been developed in this paper. The system was realized over a new direct current (DC) distribution system, which puts low stress on environment. It is shown first that the signal attenuation characteristic of polyethylene-insulator power cables is equal to or better than that of LAN cables and the coaxial cables. Next, installation methods to make the balance performance of the polyethylene cables excellent are proposed. It is experimentally shown that a proposed method of the dual mode transmission for the PLC signals, that is appropriate for the high balanced power-lines, performed 1.9 times throughput at maximum. Moreover, it is described that an LED (Light Emitting Diode) Visible Light Communication (VLC) system was implemented to realize a wireless and seamless network environment with the wired PLC systems.
    • 船内DC100V給電網における伝達特性改善に関する考察, 川崎裕之, 石井誠一郎, 都築伸二, 忽那直樹, 山田芳郎, 電子情報通信学会大会講演論文集, 2011, 129, 20110228, 1349-1369, http://jglobal.jst.go.jp/public/201102271606570523
    • PLCとVLCを用いた舶用機関監視システム, 武智充司, 都築伸二, 川崎裕之, 山田芳郎, 電子情報通信学会大会講演論文集, 2011, 128, 20110228, 1349-1369, http://jglobal.jst.go.jp/public/201102296664695118
    • A-5-12 A Maritime Machinery Monitoring System using PLC and VLC, Takechi Mitsushi, Tsuzuki Shinji, Kawasaki Hiroyuki, Yamada Yoshio, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2011, 20110228, http://ci.nii.ac.jp/naid/110008513036
    • A-5-13 A Study of Improving the DC100V Power-Line Channel Transmission Characteristics, Kawasaki Hiroyuki, Ishii Seiichiro, Tsuzuki Shinji, Kutsuna Naoki, Yamada Yoshio, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2011, 20110228, http://ci.nii.ac.jp/naid/110008513037
    • Wiring method improvement for the high speed PLC in cargo ships, 石井誠一郎, 都築伸二, 川崎裕之, 忽那直樹, 山田芳郎, 電子情報通信学会技術研究報告, 110, 440(SIP2010 118-189), 73, 78, 20110224, 0913-5685, http://jglobal.jst.go.jp/public/201102294693023339
    • Throughput of Dual-mode PLC system with Simultaneous and Selective Transmission, 江田暁彦, 都築伸二, 川崎裕之, 山田芳郎, 電子情報通信学会技術研究報告, 110, 440(SIP2010 118-189), 293, 298, 20110224, 0913-5685, http://jglobal.jst.go.jp/public/201102296818179681
    • Wiring method improvement for the high speed PLC in cargo ships, ISHII Seiichiro, TSUZUKI Shinji, KAWASAKI Hiroyuki, KUTSUNA Naoki, YAMADA Yoshio, IEICE technical report. Signal processing, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SIP, 信号処理, 110, 440, 73, 78, 20110224, 09135685, http://ci.nii.ac.jp/naid/110008688535, Broadband Power-line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. It is a feature of power-line channels in cargo ships, which are the target of this paper, that the amount of the signal attenuation is larger than that in homes. It is the main reason of the attenuation that there are a lot of circuits in distribution panels. Then, the amount of attenuation per circuit has been estimated in this paper, and it is described that the reduction of the number of circuits was the most effective improvement method. The next effective method was to change the insulating material of power-line cables to the lower attenuation one. Moreover, it has been described that the impedance matching at the end of cables might be effective in the improvement of throughput performance, though it doesn't contribute to reduce the amount of the signal attenuation.
    • Throughput of Dual-mode PLC system with Simultaneous and Selective Transmission, GOUDA Akihiko, TSUZUKI Shinji, KAWASAKI Hiroyuki, YAMADA Yoshio, IEICE technical report. Signal processing, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SIP, 信号処理, 110, 440, 293, 298, 20110224, 09135685, http://ci.nii.ac.jp/naid/110008688573, As the injection and reception modes of power-line communication (PLC) signals, two modes of the differential and common can be used, so that there are four kinds of propagation modes. The proposing dual-mode transmission PLC system uses these propagation modes. In this paper, two types of the dual-mode system have been studied. One is called "selective type" that chooses the best propagation mode from four modes. Another type is "simultaneous" type, which utilizes the two injection and reception modes at the same time. To evaluate the proposing systems, two kinds of power distribution systems were constructed, which were assumed as a DC power system in house and ship, respectively. By using these DC power distribution systems, the throughput performance was measured. As a result, if the electrical balance of the power-line channels was good, the throughput of the simultaneous type achieved 1.9 times or more performance comparing to that of the conventional type. Moreover, even if the balance was not good, the obtained performance was equal to or more than that of the conventional type by using the proposing method which used both types properly.
    • Wiring method improvement for the high speed PLC in cargo ships, ISHII Seiichiro, TSUZUKI Shinji, KAWASAKI Hiroyuki, KUTSUNA Naoki, YAMADA Yoshio, IEICE technical report. Circuits and systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CAS, 回路とシステム, 110, 439, 73, 78, 20110224, 0913-5685, http://ci.nii.ac.jp/naid/110008689083, Broadband Power-line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. It is a feature of power-line channels in cargo ships, which are the target of this paper, that the amount of the signal attenuation is larger than that in homes. It is the main reason of the attenuation that there are a lot of circuits in distribution panels. Then, the amount of attenuation per circuit has been estimated in this paper, and it is described that the reduction of the number of circuits was the most effective improvement method. The next effective method was to change the insulating material of power-line cables to the lower attenuation one. Moreover, it has been described that the impedance matching at the end of cables might be effective in the improvement of throughput performance, though it doesn't contribute to reduce the amount of the signal attenuation.
    • Throughput of Dual-mode PLC system with Simultaneous and Selective Transmission, GOUDA Akihiko, TSUZUKI Shinji, KAWASAKI Hiroyuki, YAMADA Yoshio, IEICE technical report. Circuits and systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CAS, 回路とシステム, 110, 439, 293, 298, 20110224, 0913-5685, http://ci.nii.ac.jp/naid/110008689121, As the injection and reception modes of power-line communication (PLC) signals, two modes of the differential and common can be used, so that there are four kinds of propagation modes. The proposing dual-mode transmission PLC system uses these propagation modes. In this paper, two types of the dual-mode system have been studied. One is called "selective type" that chooses the best propagation mode from four modes. Another type is "simultaneous" type, which utilizes the two injection and reception modes at the same time. To evaluate the proposing systems, two kinds of power distribution systems were constructed, which were assumed as a DC power system in house and ship, respectively. By using these DC power distribution systems, the throughput performance was measured. As a result, if the electrical balance of the power-line channels was good, the throughput of the simultaneous type achieved 1.9 times or more performance comparing to that of the conventional type. Moreover, even if the balance was not good, the obtained performance was equal to or more than that of the conventional type by using the proposing method which used both types properly.
    • Wiring method improvement for the high speed PLC in cargo ships, ISHII Seiichiro, TSUZUKI Shinji, KAWASAKI Hiroyuki, KUTSUNA Naoki, YAMADA Yoshio, IEICE technical report. Communication systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CS, 通信方式, 110, 441, 73, 78, 20110224, 09135685, http://ci.nii.ac.jp/naid/110008689443, Broadband Power-line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. It is a feature of power-line channels in cargo ships, which are the target of this paper, that the amount of the signal attenuation is larger than that in homes. It is the main reason of the attenuation that there are a lot of circuits in distribution panels. Then, the amount of attenuation per circuit has been estimated in this paper, and it is described that the reduction of the number of circuits was the most effective improvement method. The next effective method was to change the insulating material of power-line cables to the lower attenuation one. Moreover, it has been described that the impedance matching at the end of cables might be effective in the improvement of throughput performance, though it doesn't contribute to reduce the amount of the signal attenuation.
    • Throughput of Dual-mode PLC system with Simultaneous and Selective Transmission, GOUDA Akihiko, TSUZUKI Shinji, KAWASAKI Hiroyuki, YAMADA Yoshio, IEICE technical report. Communication systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CS, 通信方式, 110, 441, 293, 298, 20110224, 09135685, http://ci.nii.ac.jp/naid/110008689481, As the injection and reception modes of power-line communication (PLC) signals, two modes of the differential and common can be used, so that there are four kinds of propagation modes. The proposing dual-mode transmission PLC system uses these propagation modes. In this paper, two types of the dual-mode system have been studied. One is called "selective type" that chooses the best propagation mode from four modes. Another type is "simultaneous" type, which utilizes the two injection and reception modes at the same time. To evaluate the proposing systems, two kinds of power distribution systems were constructed, which were assumed as a DC power system in house and ship, respectively. By using these DC power distribution systems, the throughput performance was measured. As a result, if the electrical balance of the power-line channels was good, the throughput of the simultaneous type achieved 1.9 times or more performance comparing to that of the conventional type. Moreover, even if the balance was not good, the obtained performance was equal to or more than that of the conventional type by using the proposing method which used both types properly.
    • 9, 83, 87, 20110000
    • 船舶PLC用伝達関数シミュレータの計算精度, 石井誠一郎, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2010, ROMBUNNO.12-15, 20100914, http://jglobal.jst.go.jp/public/201002202687659621
    • 同時伝送型デュアルモード伝送PLC方式のスループット特性, 江田暁彦, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2010, ROMBUNNO.12-16, 20100914, http://jglobal.jst.go.jp/public/201002265380641530
    • 電力ケーブルの減衰特性と絶縁体のεγ及びtanδの関係, 大西政綱, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2010, ROMBUNNO.12-1, 20100914, http://jglobal.jst.go.jp/public/201002278972859584
    • DC給電網を利用した大型船舶内高速電力線通信方式の検討, 川崎裕之, 都築伸二, 山田芳郎, 忽那直樹, 電子情報通信学会大会講演論文集, 2010, 122, 20100302, 1349-1369, http://jglobal.jst.go.jp/public/201002284508683627
    • 高速電力線通信に配慮した宅内DC給電用電力ケーブルの検討, 都築伸二, 大西政綱, 川崎裕之, 山田芳郎, 電子情報通信学会大会講演論文集, 2010, 121, 20100302, 1349-1369, http://jglobal.jst.go.jp/public/201002288839999077
    • A-5-19 A Study of DC Power Distribution Cable for High Speed Power-line Communication in House, Tsuzuki Shinji, Ohnishi Masatsua, Kawasaki Hiroyuki, Yamada Yoshio, Proceedings of the IEICE General Conference, The Institute of Electronics, Information and Communication Engineers, Proceedings of the IEICE General Conference, 2010, 20100302, http://ci.nii.ac.jp/naid/110007877038
    • A-5-20 High Speed Power Line Communication using DC Line in Cargo Ships, Kawasaki Hiroyuki, Tsuzuki Shinji, Yamada Yoshio, Kutsuna Naoki, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2010, 20100302, http://ci.nii.ac.jp/naid/110007877039
    • Improvement of noise tolerance and positioning accuracy using spread spectrum sound wave in noisy environment, Tomowo Shiigi, Naoshi Kondo, Shinji Tsuzuki, Shigeru Okada, Akira Maekawa, Toshiharu Nobara, Masao Sakakibara, Kenji Watanabe, Yuko Naniwada, Kiyotaka Okada, American Society of Agricultural and Biological Engineers Annual International Meeting 2010, ASABE 2010, 5, 4192, 4204, 20100101, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=78649689809&origin=inward, There are a lot of researches on position determination methods in room such as wireless LAN, RFID, infrared ray, TV camera, sound wave and etc. Among them, it is considered that a positioning system using sound has some merits of high measurement accuracy and low cost. In our research group, a positioning system using spread spectrum sound has been developed. So far, a system for measuring distance was developed and evaluation of its measurement accuracy was conducted. As a result of measurement under a condition of no wind, no temperature gradient and no noise, RMSE of 10m distance between a microphone and a speaker was 3.4mm. However, there are various noises, winds and temperature conditions in actual facilities such as fruit grading facilities, greenhouses, and dairy farms. It is, therefore, important to improve noise tolerance and to compensate changeable sound velocity by wind and temperature. In this paper, evaluation of noise tolerance was conducted by using three type sounds.
    • An adaptive power control method to electromagnetic environment for PLC in cargo ships, Shinji Tsuzuki, Shinpei Tatsuno, Mitsushi Takechi, Toshimasa Okabe, Hiroyuki Kawasaki, Terushi Shinpo, Yoshio Yamada, Shunsuke Takaoka, 2009 IEEE International Symposium on Power Line Communications and its Applications, ISPLC 2009, Dresden,Germany,/,131-136, 131, 136, 20090921, 10.1109/ISPLC.2009.4913417, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=70349147440&origin=inward, Abstract Power-Line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. However, the unintentional-radiation is the serious problem for ship applications because the PLC system must coexist with the emergency communication system and shortwave broadcasting services. In this paper, a power control method of PLC modems depending on the radiation strength is proposed and examined in a training ship. It is proposed to use an antenna for shortwave radios and a wideband receiver (WBR) to measure the radiation strength. It is shown that the sensitivity of the WBR is 17dB better than that of a spectrum analyzer. And by using the antenna, the WBR can be set up at any cabin in ship to measure the radiation strength. The proposed power-control algorithm consists of two modes, silent and power-control modes. After the environmental noise level is measured in the silent mode, the power level of PLC modems which cause the radiation is lowered to be the same level as the environmental noise level. If modems do not cause the radiation, their power level is raised as much as possible to guarantee the maximum possible throughput under the EMC regulation. By executing the silent mode occasionally, the controlled power level is adapted to the environmental noise level. © 2009 IEEE.
    • Characteristics of 440V power-line channels in container ships, Jun Nishioka, Shinji Tsuzuki, Michinori Yoshida, Hiroyuki Kawasaki, Tterushi Shinpo, Yoshio Yamada, 2009 IEEE International Symposium on Power Line Communications and its Applications, ISPLC 2009, Dresden,Germany/,217-222, 217, 222, 20090921, 10.1109/ISPLC.2009.4913432, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=70349101676&origin=inward, Control and monitoring is a promising application of power-line communications (PLC) in cargo-carrying ships. The container ship studied in this paper is a type of cargo-carrying ships. The reefer containers on the container ship have been monitored by using PLC over the three-phase 440V line. Since not only reefer containers but also a lot of equipment are connected to the three-phase 440V electric power-line, the obtained speed and quality of the PLC system have been so poor that improvement had been required. To improve the performance, the introduction of the wideband PLC technology is considered in this paper because the conventional PLC system is based on the narrowband PLC technology. There are few reports which describe the channel characteristics of cargo-carrying ships. Although the authors had been measuring the characteristics of 100V lines in the ships since 2007, the characteristics of 440V lines had not measured as yet. In this paper, the measurement results of the transmission characteristics in three-phase 440V electric power-lines of the container ships are explained and modeled. Two transmission modes, differential and common, were examined in the measurement. The results show that it will be possible to perform stable and high -speed PLC systems over long distances using the 3 phase 440V power-line of cargo ships if the differential transmission mode will be used. © 2009 IEEE.
    • 電磁環境適応型PLCシステムのスループット測定機能, 樹野慎平, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2009, ROMBUNNO.12-27, 20090915, http://jglobal.jst.go.jp/public/200902246266292318
    • 頭部に装着したビデオカメラを用いて動き推定を行うポインティングデバイス, 石野智敬, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2009, ROMBUNNO.13-4, 20090915, http://jglobal.jst.go.jp/public/200902267074403253
    • ISPLC2009に見るPLC技術とその応用の動向, 都築伸二, 徳田正満, 電気学会電子・情報・システム部門大会講演論文集(CD-ROM), 2009, ROMBUNNO.TC5-8, 20090903, http://jglobal.jst.go.jp/public/200902209953123701
    • PLC system based on Automatic Transmission-mode Selection, 江田暁彦, 都築伸二, 山田芳郎, 電子情報通信学会技術研究報告, 109, 144(WBS2009 7-24), 43, 48, 20090716, 0913-5685, http://jglobal.jst.go.jp/public/200902277335118123
    • PLC system based on Automatic Transmission-mode Selection, GODA Akihiko, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. WBS, Wideband System, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. WBS, ワイドバンドシステム, 109, 144, 43, 48, 20090716, 09135685, http://ci.nii.ac.jp/naid/110007356927, Although the conventional PLC (Power Line Communication) modems use only the differential-mode transmission, the authors has proposed the dual-mode transmission that uses the better transmission mode selected from the differential and common modes to increase the channel capacity. However, the mode selection was done manually, so that the adaptive mode control could not be achieved even when the channel condition changed. In this paper, an automatic mode-selection method based on a throughput measurement is proposed. And its evaluation result is also shown.
    • Delay and Attenuation Characteristics of Power-Line Channels in Ships, 石井誠一郎, 都築伸二, 西岡潤, 山田芳郎, 電子情報通信学会技術研究報告, 109, 71(WBS2009 1-6), 1, 6, 20090527, 0913-5685, http://jglobal.jst.go.jp/public/200902213311650888
    • Delay and Attenuation Characteristics of Power-Line Channels in Ships, ISHII Seiichiro, TSUZUKI Shinji, NISHIOKA Jun, YAMADA Yoshio, IEICE technical report. WBS, Wideband System, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. WBS, ワイドバンドシステム, 109, 71, 1, 6, 20090527, 09135685, http://ci.nii.ac.jp/naid/110007331106, Power-line Communication (PLC) based local area network (LAN) in ships are one of the promising applications of the PLC technology. In this paper, the delay profiles have been analyzed from the transfer function of 100V power-line channels of residence area in ships and that of 440V power-line channels for reefer containers, which had been measured by the authors. It was found that the characteristics of the delay spread were able to be approximated by a liner function of which the parameters were the length of cable and the delay spread in distribution panels. The cumulative distribution of delay time has also been calculate, and the required guard-interval value for the OFDM system in ships has been shown. In addition, the area where the signal attenuation of common-mode transmission becomes less than that of differential-mode has been studied from the channel model of attenuation.
    • 電磁環境適応型船舶PLCシステムにおけるモデム制御方式, 武智充司, 都築伸二, 樹野慎平, 川崎裕之, 岡部俊正, 神宝照司, 高岡俊輔, 電子情報通信学会大会講演論文集, 2009, 163, 20090304, 1349-1369, http://jglobal.jst.go.jp/public/200902244120105262
    • 短波放送との共存を目的とした船舶PLC信号漏洩量の簡易測定法, 樹野慎平, 都築伸二, 山田芳郎, 電子情報通信学会大会講演論文集, 2009, 164, 20090304, 1349-1369, http://jglobal.jst.go.jp/public/200902259210349010
    • A-5-25 A Simple Method of Measuring the Radiation Strength of PLC Signals for Coexisting with Shortwave Broadcasts on a Ship, Tatsuno Shinpei, Tsuzuki Shinji, Yamada Yoshio, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2009, 20090304, http://ci.nii.ac.jp/naid/110007127449
    • A-5-24 A PLC-Modem Control Method to Be Adaptive to the Electromagnetic Environment on Cargo Ships, Takechi Mitsushi, Tsuzuki Shinji, Tatsuno Shinpei, Kawasaki Hiroyuki, Okabe Toshimasa, Shinpo Terushi, Takaoka Syunsuke, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2009, 20090304, http://ci.nii.ac.jp/naid/110007127450
    • 電磁環境適応型船内PLCシステムの電界強度測定方法, 樹野慎平, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2008, ROMBUNNO.12-24, 20080915, http://jglobal.jst.go.jp/public/200902238605996688
    • Channel characteristic comparison of armored shipboard cable and unarmored one, Shinji Tsuzuki, Michinori Yoshida, Yoshio Yamada, Kazuhiro Murai, Hiroyuki Kawasaki, Kenta Matsuyama, Terushi Shinpo, Yoshihiro Saito, Shunsuke Takaoka, IEEE ISPLC 2008 - 2008 IEEE International Symposium on Power Line Communications and Its Applications, 7, 12, 20080912, 10.1109/ISPLC.2008.4510390, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=51249117570&origin=inward, Power-Line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. There are two types of ships from the viewpoint of the cable structure. One is all the power-line cables are armored, and another type is partly unarmored cables are used. For example, all the cables in cargo ships whose characteristics we measured at last year, were armored, although the cables in a training ship shown in this paper are unarmored partly. In this paper, the channel characteristic which the cable structure affects has been discussed by comparing the two types of ships. It has been concluded that if the unarmored cable is used in a ship, the common-mode transmission will be more useful than the conventional differential-mode transmission, although the countermeasure against unintentional radiation will be needed at the same time. If all the cables are armored in a ship, the radiation problem will not occur, although a kind of adaptive transmission-mode selection technique will be needed to improve the channel capacity of the conventional differentialmode transmission system.
    • 伝送モード選択によるダイバーシティ効果と船内PLCへの適用性, 都築伸二, 佐藤洸大, 山田芳郎, 電気学会電子・情報・システム部門大会講演論文集(CD-ROM), 2008, ROMBUNNO.TC6-1, 20080820, http://jglobal.jst.go.jp/public/200902245511566899
    • ISPLC2008に見るPLC技術と応用の動向, 高遠健司, 都築伸二, 電気学会電子・情報・システム部門大会講演論文集(CD-ROM), 2008, ROMBUNNO.TC6-7, 20080820, http://jglobal.jst.go.jp/public/200902265312908498
    • Characteristics of Power-Line Channels on the 440V Line of Container ships, 西岡潤, 都築伸二, 吉田道学, 川崎裕之, 神宝照司, 山田芳郎, 電子情報通信学会技術研究報告, 108, 164(SIP2008 77-88), 49, 54, 20080718, 0913-5685, http://jglobal.jst.go.jp/public/200902224876326555
    • Characteristics of Power-Line Channels on the 440V Line of Container ships, NISHIOKA JUN, TSUZUKI Shinji, YOSHIDA Michinori, KAWASAKI Hiroyuki, SHINPO Terushi, YAMADA Yoshio, IEICE technical report. WBS, Wideband System, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. WBS, ワイドバンドシステム, 108, 166, 49, 54, 20080718, 09135685, http://ci.nii.ac.jp/naid/110006989950, In the container ship, which is a kind of the cargo-carrying vessel, the reefer container is monitored by the power line communication (PLC) on the three-phase 440V electric power line. It uses the band 55kHz-440kHz. However, in recent years it often happens that machinery equipped with the inverter is installed in the ship. Therefore the PLC construction of a system using this frequency band is difficult. Then, the authors studies whether a steadier PLC system can be achieved by using the frequencies in the range of 2MHz or higher. In this paper, the measurement results of the transmission characteristic, the noise characteristic, and unintentional radiation that comes out of a power line in three-phase 440V system of the container ship are shown. These results show that in contrast to what has been done previously, it is possible to perform steady communication using the band 2MHz-20MHz in the differential mode.
    • Characteristics of Power-Line Channels on the 440V Line of Container ships, NISHIOKA JUN, TSUZUKI Shinji, YOSHIDA Michinori, KAWASAKI Hiroyuki, SHINPO Terushi, YAMADA Yoshio, IEICE technical report. Signal processing, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SIP, 信号処理, 108, 164, 49, 54, 20080718, 09135685, http://ci.nii.ac.jp/naid/110006990040, In the container ship, which is a kind of the cargo-carrying vessel, the reefer container is monitored by the power line communication (PLC) on the three-phase 440V electric power line. It uses the band 55kHz-440kHz. However, in recent years it often happens that machinery equipped with the inverter is installed in the ship. Therefore the PLC construction of a system using this frequency band is difficult. Then, the authors studies whether a steadier PLC system can be achieved by using the frequencies in the range of 2MHz or higher. In this paper, the measurement results of the transmission characteristic, the noise characteristic, and unintentional radiation that comes out of a power line in three-phase 440V system of the container ship are shown. These results show that in contrast to what has been done previously, it is possible to perform steady communication using the band 2MHz-20MHz in the differential mode.
    • 2A1-B11 Construction of Virtual Low-Noise Space under Noisy Environment : Comparison of System Construction with Operator Location Detection Methods of Machine Vision and Spread Spectrum Acoustic Waves, SHIIGI Tomowo, KONDO Naoshi, TSUZUKI Shinji, OKADA Shigeru, NOBARA Toshiharu, ロボティクス・メカトロニクス講演会講演概要集, 一般社団法人日本機械学会, ロボティクス・メカトロニクス講演会講演概要集, 2008, "2A1, B11(1)"-"2A1-B11(4)", 20080606, http://ci.nii.ac.jp/naid/110008696243, Virtual low-noise space for operators' working space under noisy environment in facility has been studied so far for keeping safety and comfortable working condition. This paper focuses on operators' location sensing methods and a comparison between the methods of machine vision from top and of Spread Spectrum Acoustic Waves are described. From the experimental results in an orange grading facility, it was observed that the method of machine vision showed small enough measurement error but problems of small measurement area and less robustness. The method of Spread Spectrum Acoustic Waves could show that noise tolerance was 13dB and there were possibilities to enlarge measurement area and to increase operator number in the virtual low-noise space.
    • Construction of Virtual Low-Noise Space under Noisy Environment-Comparison of System Construction with Operator Location Detection Methods of Machine Vision and Spread Spectrum Acoustic Waves-, 椎木友朗, 近藤直, 都築伸二, 岡田繁, 野原稔治, 日本機械学会ロボティクス・メカトロニクス講演会講演論文集(CD-ROM), 2008, ROMBUNNO.2A1-B11, 20080605, http://jglobal.jst.go.jp/public/200902206086215330
    • 高速電力線通信(PLC)を実現する設計技術 船舶におけるPLC, 都築伸二, 村井和弘, 電磁環境工学情報EMC, 20, 10, 9, 18, 20080205, 0916-2275, http://jglobal.jst.go.jp/public/200902237186542241
    • 20, 10, 9, 18, 20080200, 09162275, http://ci.nii.ac.jp/naid/40015851031
    • Operator detection method for the construction of virtual low-noise space using spread spectrum acoustic waves, Tomowo Shiigi, Naoshi Kondo, Vui Kiong Chong, Shinji Tsuzuki, Shigeru Okada, Toshiharu Nobara, American Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008, 1, 171, 181, 20080101, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=63049083517&origin=inward, Many types of agricultural facilities for grains, fruits, nuts, and vegetables have been constructed at many places in the world. Although most of operations are mechanized in the facilities, high noise from the mechanical systems often force operators inefficient or unsafe work in the agricultural facilities. Virtual low-noise space for operators' working space under noisy environment in facility has been studied so far for keeping safety and comfortable working condition. In the previous study, machine vision was adopted to determine the location of the user. However, the developed system is only workable for a narrow area of 1.5m2. This paper focuses on operators' location sensing methods by using Spread Spectrum Acoustic Waves. From the experimental results in an orange grading facility, the method of Spread Spectrum Acoustic Waves could show that noise tolerance was 13dB and there were possibilities to enlarge measurement area and to increase operator number in the virtual low-noise space.
    • Session A1, 20080000
    • 238, 9, 18, 20080000
    • 高速PLC(Power Line Communication)技術の船舶への適用, 川崎裕之, 都築伸二, マリンエンジニアリング, 42, 6, 1007, 1011, 20071101, 1346-1427|1884-3778, 10.5988/jime.42.6_1007, http://jglobal.jst.go.jp/public/200902272463999084
    • Applications of High Speed PLC Technology to Ships, KAWASAKI Hiroyuki, TSUZUKI Shinji, Marine engineering, 日本マリンエンジニアリング学会, Marine engineering : journal of the Japan Institution of Marine Engineering = マリンエンジニアリング : 日本マリンエンジニアリング学会誌, 42, 6, 79, 83, 20071101, 13461427, 10.5988/jime.42.6_1007, http://ci.nii.ac.jp/naid/10021164443
    • Characteristics of Power-Line Channels in the Training Ship YUGEMARU, 吉田道学, 都築伸二, 山田芳郎, 村井和弘, 武智充司, 松山賢太, 神宝照司, 斎藤義広, 高岡俊輔, 電子情報通信学会技術研究報告, 107, 257(WBS2007 39-46), 41, 46, 20071009, 0913-5685, http://jglobal.jst.go.jp/public/200902293198543224
    • Characteristics of Power-Line Channels in the Training Ship YUGEMARU, YOSHIDA MICHINORI, TSUZUKI Shinji, YAMADA Yoshio, MURAI Kazuhiro, TAKECHI Mitsushi, MATSUYAMA Kenta, SHINPO Terushi, SAITO Yoshihiro, TAKAOKA Shunsuke, IEICE technical report. WBS, Wideband System, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. WBS, ワイドバンドシステム, 107, 257, 41, 46, 20071009, 09135685, http://ci.nii.ac.jp/naid/110006453127, Power-Line Communication (PLC) based Local Area Networks (LAN) in ships are one of the promising applications of the PLC technology. The authors measured the characteristics of power-line in cargo ships last year. A feature of power distribution systems in the cargo ships is that all power-line cables in the ships are armored. In this paper, the transfer function of the training ship YUGEMARU is shown and compared with that of the cargo ships. The length of YUGEMARU is shorter than that of the cargo ships, and the unarmored power-line cable is partly used. But topology of the distribution system is the same. Furthermore, it is also shown that the degree of unintentional radiation depends on the outlet into which signals are injected.
    • Characteristics of power-line channels in cargo ships, Shinji Tsuzuki, Michinori Yoshida, Yoshio Yamada, Hiroyuki Kawasaki, Kazuhiro Murai, Kenta Matsuyama, Mitsunari Suzuki, 2007 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC'07, 324, 329, 20070926, 10.1109/ISPLC.2007.371145, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34548856792&origin=inward, The broadband PLC in cargo ships is a long-awaited technology. However the characteristics of power-line channels in the cargo ships have not been studied yet. The most unique point of the channels is that power-line cables used in most Asian cargo ships are shielded. In order to characterize the channel and investigate a suitable PLC system to the cargo ships, some parameters were measured in three typical ships. The parameters were the transfer functions (LCTR, LTR and TTR), LCL and stationary noise spectrum. From these measurements, (1) the required dynamic range of receivers, (2) average attenuation at distribution boards, (3) phase coupling loss and (4) average LCL values were derived in this paper. Since the cables are shielded and the hull provides the good ground, the usage of the common-mode transmission in addition to the conventional differentialmode, which is referred to as a dual-mode transmission system, is also proposed. Therefore the measured parameters above were included the common-mode and mode-conversion properties. As the evidence to support our proposal, some results in which the LCTR values were superior to the TTR values are shown. © 2007 IEEE.
    • 船内PLCによる不要輻射に関する一考察, 吉田道学, 都築伸二, 山田芳郎, 川崎裕之, 村井和弘, 松山賢太, 神宝照司, 斎藤義広, 高岡俊輔, 電気学会電子・情報・システム部門大会講演論文集(CD-ROM), 2007, OS2-4, 20070904, http://jglobal.jst.go.jp/public/200902208892279723
    • マルチホップルーティングの電力線通信への適用に関する研究, 南谷祐次, 岡部俊正, 松山賢太, 吉田道学, 都築伸二, 山田芳郎, 川崎裕之, 村井和弘, 神宝照司, 電気学会電子・情報・システム部門大会講演論文集(CD-ROM), 2007, OS2-5, 20070904, http://jglobal.jst.go.jp/public/200902237451471017
    • PLC適用研究~大型貨物船内LANと家庭内測位~, 都築伸二, 電子情報通信学会大会講演論文集, 2007, SS.10-SS.11, 20070307, 1349-1369, http://jglobal.jst.go.jp/public/200902233883439003
    • 大型貨物船における電力線通信路特性の測定, 川崎裕之, 都築伸二, 吉田道学, 山田芳郎, 村井和弘, 松山賢太, 鈴木満成, 電子情報通信学会大会講演論文集, 2007, 175, 20070307, 1349-1369, http://jglobal.jst.go.jp/public/200902287123681516
    • 大型貨物船内電力線の分配盤減衰特性, 吉田道学, 都築伸二, 山田芳郎, 川崎裕之, 村井和弘, 松山賢太, 鈴木満成, 電子情報通信学会大会講演論文集, 2007, 176, 20070307, 1349-1369, http://jglobal.jst.go.jp/public/200902290715292513
    • BT-2-5 Research on PLC Applications : Cargo Ship LAN and In-home Precise Localization, Tsuzuki Shinji, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2007, 2, "SS, 10"-"SS-11", 20070307, http://ci.nii.ac.jp/naid/110006464468
    • A-5-20 Measurement of Power-Line Channel Characteristics in Cargo Ships, Kawasaski Hiroyuki, Tsuzuki Shinji, Yoshida Michinori, Yamada Yoshio, Murai Kazuhiro, Matsuyama Kenta, Suzuki Mitsunari, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2007, 20070307, http://ci.nii.ac.jp/naid/110006460080
    • A-5-21 Attenuation Characteristics at Power Distribution Boards in Cargo Ships, Yoshida M., Tsuzuki S., Yamada Y., Kawasaki H., Murai K., Matsuyama K., Suzuki M., Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2007, 20070307, http://ci.nii.ac.jp/naid/110006460081
    • A Proposal of Multi-site Videoconferencing System Using Two DV Multicast Streams, TAKECHI Mitsushi, TSUZUKI Shinji, YAMADA Yosio, 情報処理学会研究報告インターネットと運用技術(IOT), 一般社団法人情報処理学会, 情報処理学会研究報告インターネットと運用技術(IOT), 2007, 3, 67, 72, 20070119, 09196072, http://ci.nii.ac.jp/naid/110006201578, The relay systems for multi-site video conferencing by DV over IP are described. Although a monitor screen has been divided into multi-portions in order to watch the circumstances of remote places for the conventional systems, the required network bandwidth for the relay has been assumed to be large. On the other hand, the proposing system has the feature that the required bandwidth is small (its average is 30Mbps, and the maximum is 60Mbps) since only the video of those who have spoken is transmitted. However, they had to talk while looking at their own faces. To solve the problem, a system using two DV multicast streams is proposed in this paper, while the required bandwidth is still small.
    • A Proposal of Multi-site Videoconferencing System Using Two DV Multicast Streams, 武智充司, 都築伸二, 山田芳郎, 情報処理学会研究報告, 2007, 3(QAI-22), 67, 72, 20070118, 0919-6072, http://jglobal.jst.go.jp/public/200902213714180148
    • A Proposal of Multi-site Videoconferencing System Using Two DV Multicast Streams, TAKECHI Mitsushi, TSUZUKI Shinji, YAMADA Yosio, IEICE technical report. Internet Architecture, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IA, インターネットアーキテクチャ, 106, 465, 67, 72, 20070111, 09135685, http://ci.nii.ac.jp/naid/110006201523, The relay systems for multi-site video conferencing by DV over IP are described. Although a monitor screen has been divided into multi-portions in order to watch the circumstances of remote places for the conventional systems, the required network bandwidth for the relay has been assumed to be large. On the other hand, the proposing system has the feature that the required bandwidth is small (its average is 30Mbps, and the maximum is 60Mbps) since only the video of those who have spoken is transmitted. However, they had to talk while looking at their own faces. To solve the problem, a system using two DV multicast streams is proposed in this paper, while the required bandwidth is still small.
    • 42, 6, 1007, 1011, 20070000, 1346-1427, 10.5988/jime.42.6_1007, http://ci.nii.ac.jp/naid/130001775273
    • A proposal of synchronization beacon systems over power-line for indoor fine-grained localization, Shinji Tsuzuki, Naoyuki Takeichi, Masahiro Hamada, Yoshio Yamada, 2006 IEEE International Symposium on Power Line Communications and Its Applications, ISPLC'06, -, -, 143, 148, 20061201, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34547256397&origin=inward, One of the problems in power-line communications (PLC) is an unnecessary radiation due to the electrical unbalance of power-lines. However, it means that power-lines can work as antennas. In this paper, a beacon signal radiation system by the power-line antenna for time synchronization among wireless and wired nodes is proposed. The considered application of the radiation system is an indoor fine-grained localization, which is determining where a given node is physically located in a room. A preliminary implementation of the localization by an acoustic rangefinder is described. Unlike other published work in this area, our rangefinder uses Direct-Sequence Code Division Multiplexed (DS-CDM) audible sound signals to detect the distance between the receiver node (i.e. microphone) and the reference point (i.e. speaker) inferred from the time of flight of the sound wave. This technique significantly improves performance in obstructed and noisy environments. The obtained localization accuracy was about 1cm in a 4m 2 plane. As a merit of using the power-line antenna, its wideness of the coverage area is also described experimentally by comparing with that of a conventional loop antenna system. © 2006 IEEE.
    • Special section on wide band systems, Shin'ichi Tachikawa, Shin'ichi Tachikawa, Shin'ichi Tachikawa, Tetsushi Ikegami, Hiroyasu Ishikawa, Tomoaki Ohtsuki, Takehiko Kobayashi, Shin'ichi Sato, Yukitoshi Sanada, Masahiko Shimizu, Kazuaki Takahashi, Shinji Tsuzuki, Hiroyuki Nakase, Hiromasa Habuchi, Shinsuke Hara, Shinya Matsufuji, Kouji Ohuchi, Masanori Hamamura, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, E89-A, 2994, 2995, 20061101, 09168508, 10.1093/ietfec/e89-a.11.2994, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=33845583887&origin=inward
    • High-speed power-line communication and its application to a localization system, Shinji Tsuzuki, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, E89-A, 11, 3006, 3012, 20061101, 0916-8508|1745-1337, 10.1093/ietfec/e89-a.11.3006, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=33845573032&origin=inward, This paper overviews the high-speed power-line communication (PLC) technology, and the related standardization and regulatory activities are described. PLC modems of 200 Mbps class become a practical use stage in the West, and the standardization activity is active now. The discussion for deregulation is being continued in also Japan, and regulation values have been proposed. Another topic in this paper is a sensor network application of PLC, which is an indoor fine-grained localization system by acoustic Direct-Sequence Code Division Multiplexed (DS-CDM) signals. The obtained average accuracy of the localization in a 4 m2 plane was 1 cm if there was no obstacle. To realize the localization system, some novel ideas, such as PLC speakers, a synchronization method based on the zero-crossing timing of the mains frequency, and integrated wired/wireless PLC, are introduced. Copyright © 2006 The Institute of Electronics, Information and Communication Engineers.
    • 電力線通信用LCLプローブモデルの簡単化, 吉田道学, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2006, ROMBUNNO.12-5, 20060912, http://jglobal.jst.go.jp/public/200902240782866110
    • FPGAによる相互参照テンプレートマッチング手法の実装, 三村陽礼, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2006, ROMBUNNO.9-15, 20060912, http://jglobal.jst.go.jp/public/200902246236053572
    • 可聴音測位システム用音響電子透かし法の基礎検討, 今岡通博, 村田健史, 都築伸二, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2006, ROMBUNNO.7-6, 20060912, http://jglobal.jst.go.jp/public/200902275519058520
    • 多地点DVカメラ映像の選択中継方式に関する基礎検討, 武智充司, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集(CD-ROM), 2006, ROMBUNNO.12-26, 20060912, http://jglobal.jst.go.jp/public/200902278986229000
    • デジタルビデオ多地点会議の中継地点自動選択およびエコー防止方式, 武智充司, 都築伸二, 山田芳郎, 情報処理学会シンポジウム論文集, 2006, 6-2, 597, 600, 20060705, 1344-0640, http://jglobal.jst.go.jp/public/200902275587575605
    • A study of producing an LCL probe for residential power lines, Yasuto Kawakami, Yasuto Kawakami, Shinji Tsuzuki, Shinji Tsuzuki, Shinji Tsuzuki, Masaru Wasaki, Yoshio Yamada, Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi), 155, 38, 44, 20060501, 04247760, 10.1002/eej.20166, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=33645657650&origin=inward, Although power-line communications are expected as a promising method to realize an in-home network, one of their difficulties is an unnecessary radiation due to the electrical unbalance of power-line channels. To solve the problem, the statistical data of electrical unbalance based on measurements in the practical fields, that is, many and various Japanese residential power lines, must be collected as the first step. In this paper, a method to produce a longitudinal-conversion-loss (LCL) probe that can be used for the practical measurement is studied. The LCL is a measure of the electrical unbalance, and is often used to determine the impairment of EMC performance of a system by the cabling. To improve the dynamic range of the probe, an adjustment method of the transformers' parameters is proposed. According to our scenario, the obtained dynamic range was better than that of the conventional probe with the frequency band higher than 2 MHz. The achieved improvement was 6 dB at 6 MHz, and 14 dB at 30 MHz, for example. © 2006 Wiley Periodicals, Inc.
    • -, -, WSN06-6, 20060000
    • Power-line channel modeling for common-mode signal transmission/suppression, Shinji Tsuzuki, Michinori Yoshida, Yoshio Yamada, 2005 International Symposium on Power Line Communications and Its Applications, ISPLC 2005, 2005, 210, 214, 20051201, 10.1109/ISPLC.2005.1430498, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=33744484047&origin=inward, The common-mode signal transmission and suppression are attractive from the viewpoints of the channel-capacity improvement and adaptive cancellation of the unwanted radiation from the power-line. To study this transmission and suppression, a channel modeling method based on the transmission-matrix theory is proposed in this paper. And the proposed modeling accuracy is evaluated by using an LCL probe which the authors had developed. As an application example of the proposed model, the channel capacity depending on the electrical unbalance of power-line channels is approximated for the common-mode signal transmission. © 2005 IEEE.
    • Home Network and Sensor Network by Power-Line Communications, 都築伸二, 電子情報通信学会技術研究報告, 105, 176(WBS2005 8-20), 67, 72, 20050707, 0913-5685, http://jglobal.jst.go.jp/public/200902255660242406
    • Home Network and Sensor Network by Power-Line Communications, TSUZUKI Shinji, IEICE technical report. WBS, Wideband System, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. WBS, ワイドバンドシステム, 105, 176, 67, 72, 20050707, 09135685, http://ci.nii.ac.jp/naid/110003224593, In recent years, high-speed power-line communication (PLC) systems attract attention. In this paper, the PLC systems are classified into three applications, i.e., Internet access, home-network, and inter-house or in-building communications, and their current situations are explained. In them, ultra high-speed (around 200Mbps) PLC systems applied to Internet access (Access BPL) and home-network (HomePlug AV) of the U.S. are the latest topics. However, since these high-speed PLC systems use the high frequency (HF) band, i.e., 2M to 30MHz, the unnecessary radiation from power-lines poses interference to existing radio stations using the same band. Although the HF-band PLC systems are already commercialized in the West where regulation is comparatively loose, it is under examination in Japan whether HF-band use should be permitted. The trend of such regulatory frameworks is also described.
    • Home Network and Sensor Network by Power-Line Communications, TSUZUKI Shinji, IEICEIEICE Technical Report, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SIP, 信号処理, 105, 174, 67, 72, 20050707, 09135685, http://ci.nii.ac.jp/naid/110003281712, In recent years, high-speed power-line communication (PLC) systems attract attention. In this paper, the PLC systems are classified into three applications, i.e., Internet access, home-network, and inter-house or in-building communications, and their current situations are explained. In them, ultra high-speed (around 200Mbps) PLC systems applied to Internet access (Access BPL) and home-network (HomePlug AV) of the U.S. are the latest topics. However, since these high-speed PLC systems use the high frequency (HF) band, i.e., 2M to 30MHz, the unnecessary radiation from power-lines poses interference to existing radio stations using the same band. Although the HF-band PLC systems are already commercialized in the West where regulation is comparatively loose, it is under examination in Japan whether HF-band use should be permitted. The trend of such regulatory frameworks is also described.
    • An Implementation Study of a Repeater for Digital Video Multi-points Teleconferencing over FTTH Internet Access Services, TSUZUKI Shinji, IGUCHI Yoshinori, YAMADA Yoshio, IPSJ SIG Notes, 一般社団法人情報処理学会, 情報処理学会研究報告コンピュータセキュリティ(CSEC), 2005, 33, 253, 258, 20050323, 09196072, http://ci.nii.ac.jp/naid/110002695490, In this paper, an implementation method of a repeater for Digital Video (DV) multi-points teleconferencing over FTTH (Fiber To The Home) Internet access services is studied. One of the problems in the conventional DV streaming method was the serious number of packet-losses. This paper shows that the burst packet-transmission caused the problem. By the proposing software method of smoothing the packet intervals, the probability of the burst packet-loss decreased effectively even when PCs working under general propose OS transmitted the packets. The conventional repeater had another problem, which was the long delay time due to the analog to digital conversion for multi-window display processing. The proposed repeater selected automatically the speaker's picture which should be relayed, instead of multi-window displaying, so that the required delay time could be reduced.
    • An Implementation Study of a Repeater for Digital Video Multi-points Teleconferencing over FTTH Internet Access Services, TSUZUKI Shinji, IGUCHI Yoshinori, YAMADA Yoshio, IPSJ SIG Notes, 一般社団法人情報処理学会, 情報処理学会研究報告マルチメディア通信と分散処理(DPS), 2005, 33, 253, 258, 20050323, 09196072, http://ci.nii.ac.jp/naid/110002949615, In this paper, an implementation method of a repeater for Digital Video (DV) multi-points teleconferencing over FTTH (Fiber To The Home) Internet access services is studied. One of the problems in the conventional DV streaming method was the serious number of packet-losses. This paper shows that the burst packet-transmission caused the problem. By the proposing software method of smoothing the packet intervals, the probability of the burst packet-loss decreased effectively even when PCs working under general propose OS transmitted the packets. The conventional repeater had another problem, which was the long delay time due to the analog to digital conversion for multi-window display processing. The proposed repeater selected automatically the speaker's picture which should be relayed, instead of multi-window displaying, so that the required delay time could be reduced.
    • An Implementation Study of a Repeater for Digital Video Multi-points Teleconferencing over FTTH Internet Access Services, 都築伸二, 井口義範, 山田芳郎, 情報処理学会研究報告, 2005, 33(DPS-122 CSEC-28), 253, 258, 20050322, 0919-6072, http://jglobal.jst.go.jp/public/200902213913783579
    • FTTH網を経由するDVストリーミングにおけるパケットロス対策, 川口義範, 都築伸二, 山田芳郎, 電子情報通信学会大会講演論文集, 2005, 217, 20050307, 1349-1369, http://jglobal.jst.go.jp/public/200902283591334283
    • B-7-63 The Measures against Packet Loss in Digital Video Streaming via FTTH Internet Access Lines, Iguchi Y., Tsuzuki S., Yamada Y., Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2005, 2, 20050307, http://ci.nii.ac.jp/naid/110004694371
    • (ISPLC 2005),, 20050000
    • 105, 174, 67, 72, 20050000
    • 平衡度を考慮した低ふく射電力線通信モデムの考察, 古川広忠, 都築伸二, 電気学会電子・情報・システム部門大会講演論文集(CD-ROM), 2004, OS1-7, 20040902, http://jglobal.jst.go.jp/public/200902263508620341
    • 29, 8, 18, 22, 20040810, 0916815X, http://ci.nii.ac.jp/naid/10013361368
    • A Study of Producing an LCL Probe for Residential Power-lines, KAWAKAMI Yasuto, TSUZUKI Shinji, WASAKI Masaru, YAMADA Yoshio, IEEJ Transactions on Electronics, Information and Systems, The Institute of Electrical Engineers of Japan, 電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society, 124, 7, 1375, 1381, 20040701, 0385-4221|1348-8155, 10.1541/ieejeiss.124.1375, http://ci.nii.ac.jp/naid/10013268097, Although power-line communications are expected as a promising method to realize an in-home network, one of their difficulties is an unnecessary radiation due to the electrical unbalance of power-line channels. To solve the problem, the statistical data of electrical unbalance based on the measurement at the practical fields, i.e., many and various Japanese residential power-lines, must be collected as the first step. In this paper, a method to produce a longitudinal-conversion-loss˜(LCL) probe that can be used for the practical measurement is studied. The LCL is a measure of the electrical unbalance, and is often used to determine the impairment of EMC performance of a system by the cabling. To improve the dynamic range of the probe, an adjustment method of transformers' parameters is proposed. According to our scenario, the obtained dynamic range was better than that of the conventional probe with the frequency band higher than 2MHz. The achieved improvement was 6dB at 6MHz, and 14dB at 30MHz, for example.
    • Current Situation and Foremost Task of High-Speed Power-Line Communications, 都築伸二, 山田芳郎, 愛媛大学工学部工学ジャーナル, 3, 49, 58, 20040300, 1348-9895, http://jglobal.jst.go.jp/public/200902218398266517
    • Current Situation and Foremost Task of High-Speed Power-Line Communications, TSUZUKI Shinji, YAMADA Yoshio, Annual journal of engineering, Ehime University, 愛媛大学, 工学ジャーナル, 3, 49, 58, 20040300, 13489895, http://ci.nii.ac.jp/naid/110004688236, Power-line communications (PLC) are classified into three applications, i. e., Internet access, home-network, and inter-house communications, and those current situations in Japan are explained in this paper. The experiments of Internet access service by Japanese power utility companies and the activity of HomePlug Powerline Alliance in U. S. A., i. e., high speed PLC using HF frequency band (2M to 30MHz) for home-networking, are introduced. To realize the latter technology in Japan, it is also explained that the deregulation and the solution for the interference to the existing radio stations are needed.
    • Improvement of DV Transmission Program over IP Network, 光枝慶一, 都築伸二, 山田芳郎, 電子情報通信学会技術研究報告, 103, 605(IA2003 36-46), 1, 5, 20040128, 0913-5685, http://jglobal.jst.go.jp/public/200902257819646786
    • The home network by power-line communication, 都築伸二, 電子情報通信学会技術研究報告, 103, 576(OIS2003 61-69), 51, 56, 20040122, 0913-5685, http://jglobal.jst.go.jp/public/200902248492781588
    • Improvement of DV Transmission Program over IP Network, MITSUEDA Keiichi, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Internet Architecture, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IA, インターネットアーキテクチャ, 103, 605, 1, 5, 20040121, 09135685, http://ci.nii.ac.jp/naid/110003173479, The authors have been developing a real-time transmission program of digital video (DV) data from a high quality video camera over IP networks, and upgraded recently. In this paper, the upgraded points, that is its user-interface, communication protocols, and a solution of packet loss problems are reported. Moreover, the developed program is compared to DVTS that is a well-known program and provides similar functions to our program, and superior points of the proposed program are explained.
    • Improvement of DV Transmission Program over IP Network, MITSUEDA Keiichi, TSUZUKI Shinji, YAMADA Yoshio, 情報処理学会研究報告インターネットと運用技術(IOT), 一般社団法人情報処理学会, 情報処理学会研究報告インターネットと運用技術(IOT), 2004, 8, 1, 5, 20040120, 09196072, http://ci.nii.ac.jp/naid/110006381357, The authors have been developing a real-time transmission program of digital video (DV) data from a high quality video camera over IP networks, and upgraded recently. In this paper, the upgraded points, that is its user-interface, communication protocols, and a solution of packet loss problems are reported. Moreover, the developed program is compared to DVTS that is a well-known program and provides similar functions to our program, and superior points of the proposed program are explained.
    • The home network by power-line communication(Telecommunication Management), TSUZUKI Shinji, Technical report of IEICE. TM, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. TM, テレコミュニケーションマネジメント, 103, 574, 51, 56, 20040115, 09135685, http://ci.nii.ac.jp/naid/110003170185, Power-Line communications (PLC) are classified into three applications, i.e., Internet access, home-network, and inter-house communications, and those current situations in Japan are explained in this paper. The experiments of Internet access service by Japanese power utility companies and the activity of HomePlug Powerline Alliance in U.S.A., i.e., high speed PLC using HF frequency band (2M to 30MHz) for home-networking, are introduced. To realize the latter technology in Japan, it is also explained that the deregulation and the solution for the interference to the existing radio stations are needed.
    • The home network by power-line communication, TSUZUKI Shinji, IEICE technical report. Office Information Systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. OIS, オフィスインフォメーションシステム, 103, 576, 51, 56, 20040115, 09135685, http://ci.nii.ac.jp/naid/110003173844, Power-Line communications (PLC) are classified into three applications, i.e., Internet access, home-network, and inter-house communications, and those current situations in Japan are explained in this paper. The experiments of Internet access service by Japanese power utility companies and the activity of HomePlug Powerline Alliance in U.S.A., i.e., high speed PLC using HF frequency band (2M to 30MHz) for home-networking, are introduced. To realize the latter technology in Japan, it is also explained that the deregulation and the solution for the interference to the existing radio stations are needed.
    • The home network by power-line communication, TSUZUKI Shinji, IEICE technical report. Information networks, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IN, 情報ネットワーク, 103, 572, 51, 56, 20040115, 09135685, http://ci.nii.ac.jp/naid/110003177427, Power-Line communications (PLC) are classified into three applications, i.e., Internet access, home-network, and inter-house communications, and those current situations in Japan are explained in this paper. The experiments of Internet access service by Japanese power utility companies and the activity of HomePlug Powerline Alliance in U.S.A., i.e., high speed PLC using HF frequency band (2M to 30MHz) for home-networking, are introduced. To realize the latter technology in Japan, it is also explained that the deregulation and the solution for the interference to the existing radio stations are needed.
    • B3-3,, 20040000
    • 3, 49, 58, 20040000
    • 相互参照テンプレートマッチングにおける探索順の効果, 小若真, 山田芳郎, 都築伸二, 映像メディア処理シンポジウム資料, 8th, 57, 58, 20031112, http://jglobal.jst.go.jp/public/200902232349807769
    • 空間マーカを用いたビデオカメラのパン・ティルト制御, 小馬場英樹, 小若真, 山田芳郎, 都築伸二, 映像メディア処理シンポジウム資料, 8th, 105, 106, 20031112, http://jglobal.jst.go.jp/public/200902248359679983
    • 屋内電力線用LCLプローブの製作, 川上康人, 都築伸二, 和崎賢, 山田芳郎, 電気学会電子・情報・システム部門大会講演論文集, 2003(CD-ROM), OS1-6, 20030829, http://jglobal.jst.go.jp/public/200902203939381619
    • 相互参照テンプレートマッチングによる動き場推定, 山田芳郎, 都築伸二, 情報科学技術フォーラム, FIT 2003, 369, 370, 20030825, http://jglobal.jst.go.jp/public/200902217927760720
    • 本格化したブロードバンド社会~技術からサービスまで~2 ブロードバンドを支えるハードウェア技術動向 2‐1 有線系ブロードバンドの技術 2‐1‐3 電力線通信, 都築伸二, 映像情報メディア学会誌, 57, 5, 535, 536, 20030501, 1342-6907, http://jglobal.jst.go.jp/public/200902248334001982
    • Power-Line Communication (Cable Network) (Trend of Hardware Technologies) ( The Era of the Broadband Network -Basic Technologies and Services-), Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 一般社団法人映像情報メディア学会, 映像情報メディア学会誌 : 映像情報メディア, 57, 5, 535, 536, 20030501, 13426907, http://ci.nii.ac.jp/naid/110003691167
    • Power-line communication, Shinji Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 57, 535, 536, 20030501, 13426907, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0038719256&origin=inward
    • 屋内3芯電力線における重信伝送方式のBER特性測定, 稲田圭吾, 都築伸二, 山田芳郎, 電子情報通信学会大会講演論文集, 2003, 157, 20030303, 1349-1369, http://jglobal.jst.go.jp/public/200902269807226160
    • Measurement of BER Characteristics of Phantom Transmission with Residential 3-Wires Power Line, INADA Keigo, TUZUKI Shinji, YAMADA Yoshio, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2003, 20030303, http://ci.nii.ac.jp/naid/110003239037
    • ニューラルネットを用いた連続的テンプレートマッチング手法, 山田芳郎, 都築伸二, 映像情報メディア学会誌, 57, 3, 399, 402, 20030301, 1342-6907, 10.3169/itej.57.399, http://jglobal.jst.go.jp/public/200902215338316427
    • Continuous Templete Matching Method Using Neural Networks, Yamada Yoshio, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 一般社団法人映像情報メディア学会, 映像情報メディア学会誌 : 映像情報メディア, 57, 3, 399, 402, 20030301, 13426907, 10.3169/itej.57.399, http://ci.nii.ac.jp/naid/110003671121, 入力画像-テンプレート画像間の相互相関係数を帯域制限補間することによって,微少な移動量を精度良く検出する連続的テンプレートマッチング手法がすでに提案されている.同手法においては,相互相関係数を補間して得られる連続関数のピーク位置推定のために,最急降下法に準じた逐次近似計算を行っている.本論文では,フィードフォワード型ニューラルネットワークを用いてこの部分の計算を行う新たなテンプレートマッチング手法を提案している.また,ピーク位置推定のための演算量が提案手法によって大幅に削減できることを実験的に明らかにしている.
    • Performance Evaluation of Cross-Referencing Template Matching Method, 二宮大祐, 山田芳郎, 都築伸二, 映像情報メディア学会技術報告, 27, 14(BCS2003 5-15/BFO2003 28-38), 21, 24, 20030221, 1342-6893, http://jglobal.jst.go.jp/public/200902269109118630
    • Performance Evaluation of Cross-Referencing Template Matching Method, NINOMIYA Daisuke, YAMADA Yoshio, TSUZUKI Shinji, ITE Technical Report, 一般社団法人映像情報メディア学会, 映像情報メディア学会技術報告, 27, 14, 21, 24, 20030221, 13426893, http://ci.nii.ac.jp/naid/110003672046, In the previous paper, the authors proposed the cross-referencing template matching algorithm wherein displacements (motion vectors) of adjacent templates are taken account into estimating the displacement of current template. This paper discusses a new method for evaluating the robustness of motion estimation algorithm including the cross-referencing template matching algorithm. The proposed method uses test image sequences corrupted by adding white gaussian random noises. Simulation experiments are conducted applying the proposed method to cross-referencing template matching algorithm.
    • Continuous template matching method using neural networks, Yoshio Yamada, Shinji Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 57, 399, 402, 20030101, 13426907, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0037628619&origin=inward
    • Trend of Hardware Technologies:Cable Network, Maeda Yoichi, Nakanishi Kenji, Yamano Seiichi, Tsuzuki Shinji, Kumozaki Kiyomi, Fujimoto Yukihiro, The Journal of the Institute of Television Engineers of Japan, The Institute of Image Information and Television Engineers, 映像情報メディア学会誌, 57, 5, 530, 538, 20030000, 1342-6907, 10.3169/itej.57.530, http://ci.nii.ac.jp/naid/130001297406
    • 5月号、pp.535-536, 20030000
    • 20030000
    • Fast Algorithm for High Density Template Matching., 山田芳郎, 都築伸二, 画像電子学会研究会講演予稿, 198th, 51, 54, 20021122, 0285-3957, http://jglobal.jst.go.jp/public/200902150744442129
    • 198, 51, 54, 20021122, 02853957, http://ci.nii.ac.jp/naid/40005514099
    • 相互参照テンプレートマッチング手法による動き推定, 山田芳郎, 都築伸二, 映像情報メディア学会冬季大会講演予稿集, 2002, 65, 20021118, 1343-4357, 10.11485/itetaikai.02win.0.65.0, http://jglobal.jst.go.jp/public/200902136663727924
    • The Present State and the Future Tasks of In-home Power-Line Communication., 都築伸二, 電子情報通信学会技術研究報告, 102, 421(CS2002 101-107), 31, 36, 20021107, 0913-5685, http://jglobal.jst.go.jp/public/200902176104585879
    • The Present State and the Future Tasks of In-home Power-Line Communication, TSUZUKI Shinji, IEICE technical report. Communication systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CS, 通信方式, 102, 421, 31, 36, 20021031, 09135685, http://ci.nii.ac.jp/naid/110003281821, Power-line communications (PLC) are classified into three applications, i.e., Internet access, home-network, and inter-house communications, and those trends in Japan are explained. The experiments of Internet access service by Japanese power utility companies and the activity of HomePlug Powerline Alliance in U.S.A., i.e., high speed PLC using HF frequency band (2M to 30MHz) for home-networking, are introduced. To realize the latter technology in Japan,, it is shown that the deregulation and the solution for the interference to the existing radio stations are needed.
    • Improvement of Transmission Characteristics and Studying of Phantom Transmission at Power Line Channel in Household., 稲田圭吾, 都築伸二, 川上康人, 山田芳郎, 電子情報通信学会技術研究報告, 102, 392(SST2002 35-49), 43, 48, 20021022, 0913-5685, http://jglobal.jst.go.jp/public/200902130673156498
    • Improvement of Transmission Characteristic and Studying of Phantom Transmission at Power Line Channel in Household, INADA Keigo, TSUZUKI Shinji, KAWAKAMI Yasuto, YAMADA Yoshio, Technical report of IEICE. SST, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SST, スペクトル拡散, 102, 392, 43, 48, 20021015, 09135685, http://ci.nii.ac.jp/naid/110003288537, Although power-line communication is expected as a promising method to realize an in-home network, one of its difficulties is the wiring scheme, which sometimes affects the signal-attenuation property and sometimes introduces an unnecessary radiation due to the electrical unbalance. These problems may occur, when power-line channels are branched, the length of two signaling-wires is different due to switch circuits, and the conventional layout of ground-wire for outlets with ground connecter is used. In this paper, new wiring schemes are proposed. It is shown that the schemes are effective in improving the transmission characteristic of the power-line channels. Moreover, the scheme allows us to make the phantom transmission available when 3-wires VVF cables are used. The phantom transmission makes the power-line channel-capacity double. Although the electrical unbalance was also improved by the proposed wiring-schemes, their degree was so small. Finally, the suitable balun for the phantom transmission is studied, and the force-balun has achieved a better isolation characteristic when compared to a float-balun.
    • Basic Study for DV Transmission System over IP Network., 光枝慶一, 都築伸二, 平屋光教, 小池泰樹, 山田芳郎, 電子情報通信学会技術研究報告, 102, 361(IA2002 18-21), 19, 24, 20021010, 0913-5685, http://jglobal.jst.go.jp/public/200902123906194887
    • Basic Study for DV Transmission System over IP Network, MITSUEDA Keiichi, TSUZUKI Shinji, HIRAYA Mitsunori, KOIKE Yasuki, YAMADA Yoshio, 情報処理学会研究報告インターネットと運用技術(IOT), 一般社団法人情報処理学会, 情報処理学会研究報告インターネットと運用技術(IOT), 2002, 93, 39, 44, 20021010, 09196072, http://ci.nii.ac.jp/naid/110006382819, In this paper, our basic study results of a program, that was developed to transmit high quality video data from a digital video (DV) camera over IP Network in real time, are shown. We propose an algorithm to convert the DV data rate to be slow. It can be used when a packet-loss occurs due to the network congestion. Another algorithm, which can shorten the transmission delay-time, is also proposed. It is realized by dropping the DV frame when the voice is silent in the frame period.
    • Basic Study for DV Transmission System over IP Network, MITSUEDA Keiichi, TSUZUKI Shinji, HIRAYA Mitsunori, KOIKE Yasuki, YAMADA Yoshio, IEICE technical report. Internet Architecture, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IA, インターネットアーキテクチャ, 102, 361, 19, 24, 20021003, 09135685, http://ci.nii.ac.jp/naid/110003173420, In this paper, our basic study results of a program, that was developed to transmit high quality video data from a digital video (DV) camera over IP Network in real time, are shown. We propose an algorithm to convert the DV data rate to be slow. It can be used when a packet-loss occurs due to the network congestion. Another algorithm, which can shorten the transmission delay-time, is also proposed. It is realized by dropping the DV frame when the voice is silent in the frame period.
    • Measurement System of the BER Performance for the High-Frequency Band Power-Line Communication and its Evaluation., 西尾英行, 都築伸二, 今城貴志, 山田芳郎, 電子情報通信学会技術研究報告, 101, 730(SST2001 190-217), 81, 86, 20020319, 0913-5685, http://jglobal.jst.go.jp/public/200902143014533580
    • Measurement System of the BER Performance for the High-Frequency Band Power-Line Communication and its Evaluation, NISHIO Hideyuki, TSUZUKI Shinji, IMAJYO Takashi, YAMADA Yoshio, 電子情報通信学会技術研究報告. ITS, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. ITS, 101, 732, 81, 86, 20020312, 09135685, http://ci.nii.ac.jp/naid/110003185287, The research and development of high-speed power-line communication (PLC), which is about 10Mbps, using the high-frequency (HF) band between 2MHz and 30MHz have become active. Since the channel characteristic and the noise property of the band have not studied well, the computer simulation is not enough to develop the PLC system. The experiment using the practical power-line is also necessary to verify the bit-error-rate (BER) performance. In this paper, the BER measurement system for the HF-band PLC, in which the modulation method and data-bit-rate are programmable, is proposed. Using the system, the improvement of the BER performance due to the impedance matching at the end of VVF cables, which are widely used as indoor power-line cables in Japan, is shown. And the BER performance using the practical power-line of the authors' laboratory is also measured.
    • Measurement System of the BER Performance for the High-Frequency Band Power-Line Communication and its Evaluation, NISHIO Hideyuki, TSUZUKI Shinji, IMAJYO Takashi, YAMADA Yoshio, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, 101, 726, 81, 86, 20020312, 09135685, http://ci.nii.ac.jp/naid/110003197831, The research and development of high-speed power-line communication (PLC), which is about 10Mbps, using the high-frequency (HF) band between 2MHz and 30MHz have become active. Since the channel characteristic and the noise property of the band have not studied well, the computer simulation is not enough to develop the PLC system. The experiment using the practical power-line is also necessary to verify the bit-error-rate (BER) performance. In this paper, the BER measurement system for the HF-band PLC, in which the modulation method and data-bit-rate are programmable, is proposed. Using the system, the improvement of the BER performance due to the impedance matching at the end of VVF cables, which are widely used as indoor power-line cables in Japan, is shown. And the BER performance using the practical power-line of the authors' laboratory is also measured.
    • Measurement System of the BER Performance for the High-Frequency Band Power-Line Communication and its Evaluation, NISHIO Hideyuki, TSUZUKI Shinji, IMAJYO Takashi, YAMADA Yoshio, Technical report of IEICE. SST, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SST, スペクトル拡散, 101, 730, 81, 86, 20020312, 09135685, http://ci.nii.ac.jp/naid/110003290948, The research and development of high-speed power-line communication (PLC), which is about 10Mbps, using the high-frequency (HF) band between 2MHz and 30MHz have become active. Since the channel characteristic and the noise property of the band have not studied well, the computer simulation is not enough to develop the PLC system. The experiment using the practical power-line is also necessary to verify the bit-error-rate (BER) performance. In this paper, the BEE. measurement system for the HF-band PLC, in which the modulation method and data-bit-rate are programmable, is proposed. Using the system, the improvement of the BER performance due to the impedance matching at the end of VVF cables, which are widely used as indoor power-line cables in Japan, is shown. And the BER performance using the practical power-line of the authors' laboratory is also measured.
    • Measurement System of the BER Performance for the High-Frequency Band Power-Line Communication and its Evaluation, NISHIO Hideyuki, TSUZUKI Shinji, IMAJYO Takashi, YAMADA Yoshio, Technical report of IEICE. ISEC, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. ISEC, 情報セキュリティ, 101, 728, 81, 86, 20020312, 09135685, http://ci.nii.ac.jp/naid/110003298208, The research and development of high-speed power-line communication (PLC), which is about 10Mbps, using the high-frequency (HF) band between 2MHz and 30MHz have become active. Since the channel characteristic and the noise property of the band have not studied well, the computer simulation is not enough to develop the PLC system. The experiment using the practical power-line is also necessary to verify the bit-error-rate (BER) performance. In this paper, the BER measurement system for the HF-band PLC, in which the modulation method and data-bit-rate are programmable, is proposed. Using the system, the improvement of the BER performance due to the impedance matching at the end of VVF cables, which are widely used as indoor power-line cables in Japan, is shown. And the BER performance using the practical power-line of the authors' laboratory is also measured.
    • 屋内電力線通信路端のインピーダンス整合の効果について, 西尾英行, 都築伸二, 山田芳郎, 電子情報通信学会大会講演論文集, 2002, 186, 20020307, 1349-1369, http://jglobal.jst.go.jp/public/200902169453044005
    • Effect of Impedance Matching at the End of Residential Power-Line Communication Cable, NISHIO Hideyuki, TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2002, 20020307, http://ci.nii.ac.jp/naid/110003496377
    • 5, 42, 46, 20020300, 13439928, http://ci.nii.ac.jp/naid/40005573271
    • 1, 127, 136, 20020300, http://ci.nii.ac.jp/naid/40005606026
    • 1, 137, 146, 20020300, http://ci.nii.ac.jp/naid/40005606027
    • Fast algorithm for high density template matching, Yamada Yoshio, Tsuzuki Shinji, Reports of the Technical Conference of the Institute of Image Electronics Engineers of Japan, The Institute of Image Electronics Engineers of Japan, Reports of the Technical Conference of the Institute of Image Electronics Engineers of Japan, 2, 0, 8, 8, 20020000, 02853957, http://ci.nii.ac.jp/naid/130005441360, As a standard motion estimation method, the template matching has been used for estimating relatively coarse motion field, wherein each estimated displacement represents the motion of the area with typically 8 by 8 or more pixels. This paper proposes a fast algorithm for the template matching method suitable for estimating high density or fine motion field, wherein each estimated displacement represents the motion of the area with 4 by 4 or less pixels. It is found that the computational complexity of the proposed algorithm is almost independent from the density of motion field and the size of templates.
    • Motion Estimation by Cross-referencing Template Matching Method, YAMADA Yoshio, TUZUKI Shinji, PROCEEDINGS OF THE ITE CONVENTION, 一般社団法人 映像情報メディア学会, 映像情報メディア学会大会講演予稿集, 2, 0, 65, 65, 20020000, 10.11485/itetaikai.02win.0.65.0, http://ci.nii.ac.jp/naid/130004599098
    • 第1巻、pp.121-130, 20020000
    • 3章(pp.29-46)7章(pp.79-90), 20020000
    • 通信方式研究会, CS2002-107, pp.31-36, 20020000
    • IA2002-21, pp.19-24,, 20020000
    • 60, 64, 20020000
    • 55, 59, 20020000
    • 知らないわけではないけれど 第43回 電力線を用いたホームネットワーク, 都築伸二, 映像情報メディア学会誌, 55, 12, 1619, 1620, 20011201, 1342-6907, 10.3169/itej.55.1619, http://jglobal.jst.go.jp/public/200902118566697648
    • Home Network using Power-line(For Your Information(43)), Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 一般社団法人映像情報メディア学会, 映像情報メディア学会誌 : 映像情報メディア, 55, 12, 1619, 1620, 20011201, 13426907, 10.3169/itej.55.1619, http://ci.nii.ac.jp/naid/110003692922
    • Home network using power-line, Shinji Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 55, 73, 20011201, 13426907, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0035699014&origin=inward
    • ニューラルネットワークを用いた移動量推定手法, 山田芳郎, 都築伸二, 映像メディア処理シンポジウム資料, 6th, 47, 48, 20011112, http://jglobal.jst.go.jp/public/200902194936844651
    • 話題のブロードバンドアクセスシステム 電力線通信 来年には10Mbps級通信が実用化!?, 都築伸二, Optronics, 236, 150, 153, 20010810, 0286-9659, http://jglobal.jst.go.jp/public/200902154067025147
    • An Experimental Study of QoS Policy-based Networking Depending on User ID Information., 平屋光教, 都築伸二, 山田芳郎, 田崎三郎, 電子情報通信学会技術研究報告, 101, 196(RCS2001 62-78), 69, 73, 20010718, 0913-5685, http://jglobal.jst.go.jp/public/200902102477999408
    • An Experimental Study of QoS Policy-based Networking Depending on User ID Information, HIRAYA Mitsunori, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, IEICE technical report, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. NS, ネットワークシステム, 101, 194, 69, 73, 20010711, 09135685, http://ci.nii.ac.jp/naid/110003181161, In the interconnection and inter-operating between networks working for different purposes, it is important to manage the networks based on a policy, that is, how to utilize the networks mutually. In this paper, it is studied how to realize the policy-based network offering a QoS(Quality-of-Service)which depends on the user group. The network is realized by using the dynamic VLAN(Virtual LAN)technology which changes depending on user ID, and the ID is administered by Windows'Active Directory. It is verified whether the desired accuracy of a transmission bandwidth assigned by the QoS policy is performed. Furthermore, it is studied by evaluating the accuracy of the assigned bandwidth by the case where the considering traffic uses TCP or UDP.
    • An Experimental Study of QoS Policy-based Networking Depending on User ID Information, HIRAYA Mitsunori, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, Technical report of IEICE. RCS, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. RCS, 無線通信システム, 101, 196, 69, 73, 20010711, 09135685, http://ci.nii.ac.jp/naid/110003305847, In the interconnection and inter-operating between networks working for different purposes, it is important to manage the networks based on a policy, that is, how to utilize the networks mutually. In this paper, it is studied how to realize the policy-based network offering a QoS(Quality-of-Service) which depends on the user group. The network is realized by using the dynamic VLAN(Virtual LAN) technology which changes depending on user ID, and the ID is administered by Windows' Active Directory. It is verified whether the desired accuracy of a transmission bandwidth assigned by the QoS policy is performed. Furthermore, it is studied by evaluating the accuracy of the assigned bandwidth by the case where the considering traffic uses TCP or UDP.
    • 画像処理技術 入力画像のSN比を考慮した連続的テンプレートマッチング手法, 山田芳郎, 篠原一哲, 都築伸二, 映像情報メディア学会誌, 55, 6, 898, 901, 20010620, 1342-6907, 10.3169/itej.55.898, http://jglobal.jst.go.jp/public/200902190343847403
    • Continuous Template Matching Method with Consideration for the SNR of Input Images(Special Section Image Processing Technology), Yamada Yoshio, Shinohara Kazunori, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 一般社団法人映像情報メディア学会, 映像情報メディア学会誌 : 映像情報メディア, 55, 6, 898, 901, 20010620, 13426907, 10.3169/itej.55.898, http://ci.nii.ac.jp/naid/110003685832, 本論文では, 連続的テンプレートマッチング手法における検出精度と所要SN比の関係を実験的に検討している.ここでは, 入力画像およびテンプレート画像に対して, 互いに統計的に独立な白色ガウス雑音が重畳している場合を仮定している.1/4画素相当の検出精度を実現するためには, 42dB程度のSN比が必要であること, 雑音が存在する場合であっても, 入力画像およびテンプレート画像に対する高域遮断は検出精度の劣化をもたらすことを明らかにしている.
    • Continuous template matching method with consideration for the SNR of input images, Y. Yamada, K. Shinohara, S. Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 55, 898, 20010601, 13426907, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0035357372&origin=inward
    • Indoor Networking using Wireless or Power-line Communication Technology and its Evaluation., 高松岳志, 都築伸二, 岡崎幹, 山田芳郎, 電子情報通信学会技術研究報告, 101, 29(CS2001 1-9), 39, 45, 20010426, 0913-5685, http://jglobal.jst.go.jp/public/200902188492434370
    • Indoor Networking using Wireless or Power-line Communication Technology and its Evaluation, TAKAMATSU Takeshi, TSUZUKI Shinji, OKAZAKI Motoki, YAMADA Yoshio, IEICE technical report. Communication systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CS, 通信方式, 101, 29, 39, 45, 20010419, 09135685, http://ci.nii.ac.jp/naid/110003283213, In recent years, wireless-LAN-based indoor communications draw attention due to their high-speed performance. However, in practice, the area where the wireless-LAN can cover is limited because of obstacles such as walls. On the other hand, the transmission rate of power-line communication is lower than that of wireless-LAN, but relatively wider range can be covered. In this paper, the coverage area of the wireless-LAN and power-line-LAN and their effective transmission rate are measured in indoor environments, i.e., an elementary school and a wooden house.
    • Indoor Networking using Wireless or Power-line Communication Technology and its Evaluation, TAKAMATSU Takeshi, TSUZUKI Shinji, OKAZAKI Motoki, YAMADA Yoshio, Technical report of IEICE. SST, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SST, スペクトル拡散, 101, 27, 39, 45, 20010419, 09135685, http://ci.nii.ac.jp/naid/110003290573, In recent years, wireless-LAN-based indoor communications draw attention due to their high-speed performance. However, in practice, the area where the wireless-LAN can cover is limited because of obstacles such as walls. On the other hand, the transmission rate of power-line communication is lower than that of wireless-LAN, but relatively wider range can be covered. In this paper, the coverage area of the wireless-LAN and power-line-LAN and their effective transmission rate are measured in indoor environments, i.e., an elementary school and a wooden house.
    • 家電機器の高域インピーダンスモデル作成に関する一考察, 都築伸二, 山本心司, 山田芳郎, 電子情報通信学会大会講演論文集, 2001, 165, 20010307, 1349-1369, http://jglobal.jst.go.jp/public/200902157866643979
    • A Study on Impedance Modeling of Electrical Household Appliances at High Frequency Band, TUZUKI Shinji, YAMAMOTO Sinji, YAMADA Yoshio, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2001, 20010307, http://ci.nii.ac.jp/naid/110003256984
    • Detection Accuracy of Continuous Template Matching Method with Spline Interpolation., 山田芳郎, 水金真志, 都築伸二, 映像情報メディア学会技術報告, 25, 22(MIP2001 53-58), 15, 20, 20010302, 1342-6893, http://jglobal.jst.go.jp/public/200902142561500933
    • A Method for Peak Position Estimation of Cross Correlation Functions Using Neural Network., 片山江理香, 山田芳郎, 都築伸二, 映像情報メディア学会技術報告, 25, 22(MIP2001 53-58), 21, 24, 20010302, 1342-6893, http://jglobal.jst.go.jp/public/200902142862865325
    • Detection Accuracy of Continuous Template Matching Method with Spline Interpolation, YAMADA Yoshio, MIZUKANE Masashi, TSUZUKI Shinji, ITE Technical Report, 一般社団法人映像情報メディア学会, 映像情報メディア学会技術報告, 25, 22, 15, 20, 20010302, 13426893, http://ci.nii.ac.jp/naid/110003688843, In the continuous template matcing method, adopting the bilinear interpolation model in the waveform domainleads to the interpolation of cross correlation coefficients with the third order B-spline function. This paper presents the relationship between the accuracy of displacement detection and required Signal-to-Noise Ratio (SNR) in the contiuous template matching method with the first to 10-th order B-spline interpolation models.
    • A Method for Peak Position Estimation of Cross Correlation Functions Using Neural Network, KATAYAMA Erika, YAMADA Yoshio, TSUZUKI Shinji, ITE Technical Report, 一般社団法人映像情報メディア学会, 映像情報メディア学会技術報告, 25, 22, 21, 24, 20010302, 13426893, http://ci.nii.ac.jp/naid/110003688844, The continuous template matching method have been proposed in the previous papers in order to realize the precision subpixel displacement detection between subsequent frames of motion pictures. In the proposed method, a successive approximation algorithm adopting partial derivatives was used for maximizing the interpolated cross correlation functions. The authors suggested that using partial derivatives leads to some weakness in the search of the maxima. In this paper, a nueral network based maximization (peak detection) algorithm is proposed in order to resolve the above mentioned fragileness.
    • 8月号、pp.150-153., 20010000
    • vol.55, No.12, pp.1619-1620, 20010000, 10.3169/itej.55.1619
    • 79, 84, 20010000
    • 20010000
    • (]G0010[)(]G0010[), 47, 55, 20010000
    • Problems on power-line communications to realize high-speed versions., 都築伸二, 電子情報通信学会技術研究報告, 100, 513(SST2000 54-60), 1, 6, 20001215, 0913-5685, http://jglobal.jst.go.jp/public/200902105568324631
    • Measurement of characteristic of indoor power-line channel., 山本心司, 都築伸二, 山田芳郎, 電子情報通信学会技術研究報告, 100, 513(SST2000 54-60), 7, 11, 20001215, 0913-5685, http://jglobal.jst.go.jp/public/200902141873281124
    • Measurement of Distributed Constants of VVF Cable., 高松岳志, 都築伸二, 山田芳郎, 電子情報通信学会技術研究報告, 100, 513(SST2000 54-60), 13, 18, 20001215, 0913-5685, http://jglobal.jst.go.jp/public/200902146335627233
    • Problems on power-line communications to realize high-speed versions, TSUZUKI Shinji, Technical report of IEICE. SST, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SST, スペクトル拡散, 100, 513, 1, 6, 20001208, 09135685, http://ci.nii.ac.jp/naid/110003290240, Owing to the progress of digitization of multimedia information handled in home, networking in home(referred to as home networks), which includes networks to control houschold appliances. will also progress. Power-line is one of promising channels as the home network, since already-installed line can be used, i.e., wiring-free. In this paper, problems to realize high-speed power-line communications are discussed.
    • Measurement of characteristic of indoor power-line channel, YAMAMOTO Shinji, TSUZUKI Shinji, YAMADA Yoshio, Technical report of IEICE. SST, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SST, スペクトル拡散, 100, 513, 7, 11, 20001208, 09135685, http://ci.nii.ac.jp/naid/110003290242, The digitized information treated in house is increasing rapidly in recent years, so that the demand for home network is also increasing. High-speed power-line communication(PLC)using high-frequency bands is paid attention as a promising method for the home network, because its cabling cost is free. However, its research is not popular in Japan due to the restriction of regulation, i.e., the allowed band is from 10kHz to 450kHz. The channel models of Japanese power-line environments in the high-frequency band have not reported yet. In this paper, the impedance characteristics of household-appliances and power-line channels are measured in the high-frequency band, i.e., from 70kHz to 35MHz. And the transfer function of the channels are also measured and these results are shown.
    • Measurement of Distributed Constants of VVF Cable, TAKAMATSU Takeshi, TSUZUKI Shinji, YAMADA Yoshio, Technical report of IEICE. SST, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SST, スペクトル拡散, 100, 513, 13, 18, 20001208, 09135685, http://ci.nii.ac.jp/naid/110003290244, The research and development of high-speed power-line communication(PLC)of several Mbps using the high-frequency band under 30MHz have become active. To realize the high-speed PLC, it is important to know the characteristics of power-line as a communication channel. The power-line channel can be treated as a distributed constant circuit at the high-frequency band. In this paper, the distributed constants of a VVF cable with two wires, which is widely used for the indoor power-line in Japan, are obtained by measuring the relative dielectric constant(ξ_γ)and the dielectric loss-tangent(or dissipation-factor, tanδ).
    • Continuous template matching method based on the minimization of interpolated error surfaces, Yoshio Yamada, Shinji Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 54, 1223, 1226, 20001201, 13426907, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0040191938&origin=inward
    • 誤差曲面を用いた連続的テンプレートマッチング手法, 山田芳郎, 都築伸二, 映像メディア処理シンポジウム資料, 5th, 25, 26, 20001113, http://jglobal.jst.go.jp/public/200902167145454410
    • A Study for Inter-networking Based on a QoS Policy (2)., 小池泰樹, 都築伸二, 山田芳郎, 田崎三郎, 電子情報通信学会技術研究報告, 100, 393(SSE2000 145-152), 25, 30, 20001026, 0913-5685, http://jglobal.jst.go.jp/public/200902192408260475
    • Detection Accuracy vs. Required SNR Characteristics in Continuous Template Matching Method., 山田芳郎, 篠原一哲, 都築伸二, 電子情報通信学会技術研究報告, 100, 387(ICD2000 110-125), 13, 18, 20001024, 0913-5685, http://jglobal.jst.go.jp/public/200902106229952760
    • A Study for Inter-networking Based on a QoS Policy(2), KOIKE Yasuki, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, Technical report of IEICE. SSE, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SSE, 交換システム, 100, 393, 25, 30, 20001019, 09135685, http://ci.nii.ac.jp/naid/110003235789, For networking among networks operating for different purposes, methods of Quality-of-Service(QoS)-policy-based routing are studied and their performances are measured. The policy is realized by routing packets following the given priority, which is based on a requirement of using applications among users. It is experimentally shown by using commercialized routers that guarantee the required bandwidth of packets is guaranteed by establishing a prior class by checking a TOS field in an IP-header. The considered QoS policy was given in this paper, such as which packets should be routed faster when the interconnecting line among networks is congested.
    • Detection Accuracy vs. Required SNR Characteristics in Continuous Template Matching Method, YAMADA Yoshio, SHINOHARA Kazunori, TSUZUKI Shinji, IEICE technical report. Image engineering, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IE, 画像工学, 100, 389, 13, 18, 20001017, 09135685, http://ci.nii.ac.jp/naid/110003195326, This paper discusses the relationship between the accuracy of displacement detection and required Signal-to-Noise Ratio(SNR)in continuous template matching method. Here we assume that, as the model of noisy input and template images, the statistically independent, additive white Gaussian sequences are applied to input and template images. It is found experimentally that the SNR of 42dB is required in order to achieve the detection accuracy of 1/4 pixel resolution and the supression of higher frequency component results the degradation of the accuracy of displacement detection.
    • Detection Accuracy vs. Required SNR Characteristics in Continuous Template Matching Method, YAMADA Yoshio, SHINOHARA Kazunori, TSUZUKI Shinji, Technical report of IEICE. DSP, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. DSP, ディジタル信号処理, 100, 385, 13, 18, 20001017, 09135685, http://ci.nii.ac.jp/naid/110003280352, This paper discusses the relationship between the accuracy of displacement detection and required Signal-to-Noise Ratio (SNR) in continuous template matching method. Here we assume that, as the model of noisy input and template images, the statistically independent, additive white Gaussian sequences are applied to input and template images. It is found experimentally that the SNR of 42dB is required in order to achieve the detection accuracy of 1/4 pixel resolution and the supression of higher frequency component results the degradation of the accuracy of displacement detection.
    • Detection Accuracy vs. Required SNR Characteristics in Continuous Template Matching Method, YAMADA Yoshio, SHINOHARA Kazunori, TSUZUKI Shinji, Technical report of IEICE. ICD, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. ICD, 集積回路, 100, 387, 13, 18, 20001017, 09135685, http://ci.nii.ac.jp/naid/110003317712, This paper discusses the relationship between the accuracy of displacement detection and required Signal-to-Noise Ratio(SNR)in continuous template matching method. Here We assume that, as the model of noisy input and template images, the statistically independent, additive white Gaussian sequences are applied to input and template images. It is found experimentally that the SNR of 42dB is required in order to achieve the detection accuracy of 1/4 pixel resolution and the supression of higher frequency component results the degradation of the accuracy of displacement detection.
    • QoSポリシ制御ネットワーク構築のための基礎検討, 小池泰樹, 都築伸二, 山田芳郎, 田崎三郎, 情報処理学会全国大会講演論文集, 61st, 3, 3.329-3.330, 20001003, http://jglobal.jst.go.jp/public/201202131928895640
    • 補間された誤差曲面の最小化に基づく連続的テンプレートマッチング手法, 山田芳郎, 都築伸二, 映像情報メディア学会誌, 54, 8, 1223, 1226, 20000820, 1342-6907, 10.3169/itej.54.1223, http://jglobal.jst.go.jp/public/200902183551997366
    • Continuous Template Matching Method Based on the Minimization of Interpolated Error Surfaces, Yamada Yoshio, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 一般社団法人映像情報メディア学会, 映像情報メディア学会誌 : 映像情報メディア, 54, 8, 1223, 1226, 20000820, 13426907, 10.3169/itej.54.1223, http://ci.nii.ac.jp/naid/110003685913, 連続的テンプレートマッチング手法は, 入力画像-テンプレート画像間の相互相関係数を帯域制限補間することによって, 微少な移動量を精度良く検出する手法である.本論文では, 相互相関係数の代わりに, 2乗誤差および絶対値誤差を用い, これらを帯域制限補間して得られる誤差曲面を最小化することによって移動量を検出する手法について検討している.また, 同手法による移動量の検出精度を明らかにしている.
    • 連続的テンプレートマッチング手法による動きベクトルの高精度検出, 山田芳郎, 都築伸二, 映像情報メディア学会誌, 54, 4, 615, 618, 20000420, 1342-6907, 10.3169/itej.54.615, http://jglobal.jst.go.jp/public/200902137857219489
    • Precision Detection of Motion Vectors by Continuous Template Matching Method, Yamada Yoshio, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 一般社団法人映像情報メディア学会, 映像情報メディア学会誌 : 映像情報メディア, 54, 4, 615, 618, 20000420, 13426907, 10.3169/itej.54.615, http://ci.nii.ac.jp/naid/110003685937, 本論文では, 連続的テンプレートマッチング手法における種々のパラメータの最適化について検討し, 雑音が存在しない理想的な条件の下での同手法の検出精度の限界を明らかにしている.また, 同手法を双1次補間モデルを用いた場合に適用することによって, 従来から広く用いられている双1次補間を用いたテンプレートマッチングの検出精度を評価し, 帯域制限補間を用いた手法と比較検討している.
    • マルチキャリア変調による電力線搬送通信のための基礎検討 (1), 都築伸二, 山田芳郎, 電子情報通信学会大会講演論文集, 2000, 175, 20000307, 1349-1369, http://jglobal.jst.go.jp/public/200902183075672151
    • A Case Study for Power Line Communication Using Multi-carrier Modulation (1), TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 2000, 20000307, http://ci.nii.ac.jp/naid/110003259817
    • 3, 16, 22, 20000300, 13439928, http://ci.nii.ac.jp/naid/40005204725
    • Synchronization of voice data on asynchronous networks and its implementation for a VSAT channel gateway, Shinji Tsuzuki, Yoshio Yamada, Saburo Tazaki, Susumu Yoshida, Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi), 130, 68, 79, 20000130, 04247760, 10.1002/(SICI)1520-6416(20000130)130:2<68::AID-EEJ9>3.0.CO;2-3, https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0033639537&origin=inward, The variation of packet-arrival intervals is one of the problems to be solved in realizing real-time voice communications on asynchronous networks such as the Internet. Although the variation can be absorbed by a receiving buffer, the end-to-end delay increases in proportion to the amount of buffered data. Therefore, the guideline for the receiving buffer's design that considers the trade-off between voice quality and delay is needed. In this paper, the design of the receiving buffer by means of the voice-speed-conversion technique is discussed. According to our scenario, the buffer size was expected to be equivalent to the time length in which the probability distribution function of the packet-arrival intervals was about 95% to 99%. However, it is shown that synchronized voice reproduction can be achieved within a preset delay, which is shorter than the corresponding time to the buffer size. This is achieved by keeping the rate of voice speed conversion within the range of 50% to 150% depending on the variation of the intervals. The proposed method was implemented in the conventional UNIX workstations (WSs) connected to an Ethernet segment. The average voice delay between WSs was 150 to 180 ms and the synchronized voice reproduction was achieved with a standard deviation of 13 to 25 ms. The proposed method is applied to VSAT-satellite-channel gateways to realize the real-time voice communication between the WSs through a VSAT channel.
    • Synchronization of voice data on asynchronous networks and its implementation for a VSAT channel gateway, Shinji Tsuzuki, Yoshio Yamada, Saburo Tazaki, Susumu Yoshida, Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi), 130, 68, 79, 20000130, 04247760, 10.1002/(SICI)1520-6416(20000130)130:2<68::AID-EEJ9>3.0.CO;2-3, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0033639537&origin=inward, The variation of packet-arrival intervals is one of the problems to be solved in realizing real-time voice communications on asynchronous networks such as the Internet. Although the variation can be absorbed by a receiving buffer, the end-to-end delay increases in proportion to the amount of buffered data. Therefore, the guideline for the receiving buffer's design that considers the trade-off between voice quality and delay is needed. In this paper, the design of the receiving buffer by means of the voice-speed-conversion technique is discussed. According to our scenario, the buffer size was expected to be equivalent to the time length in which the probability distribution function of the packet-arrival intervals was about 95% to 99%. However, it is shown that synchronized voice reproduction can be achieved within a preset delay, which is shorter than the corresponding time to the buffer size. This is achieved by keeping the rate of voice speed conversion within the range of 50% to 150% depending on the variation of the intervals. The proposed method was implemented in the conventional UNIX workstations (WSs) connected to an Ethernet segment. The average voice delay between WSs was 150 to 180 ms and the synchronized voice reproduction was achieved with a standard deviation of 13 to 25 ms. The proposed method is applied to VSAT-satellite-channel gateways to realize the real-time voice communication between the WSs through a VSAT channel.
    • 3, ISSN, 1341-9928,16-22, 20000000
    • Vol.3, 16, 22, 20000000
    • 平成12年度 地域振興のための電波利用に関する調査研究、, 20000000
    • 3, ISSN, 1341-9928,16-22, 20000000
    • 80, 88, 20000000
    • XIX, 79, 88, 20000000
    • Next Target of Spread Spectrum Technology-Application of Power Line Communication to Home Network., 都築伸二, システム/制御/情報, 43, 12, 637, 643, 19991215, 0916-1600, 10.11509/isciesci.43.12_637, http://jglobal.jst.go.jp/public/200902113559964205
    • Next Target of Spread Spectrum Technology : Aoolication of Power Line Communication to Home Network, TSUZUKI Shinji, Systems, control and information, システム制御情報学会, システム/制御/情報 : システム制御情報学会誌, 43, 12, 637, 643, 19991215, 09161600, 10.11509/isciesci.43.12_637, http://ci.nii.ac.jp/naid/110003891554
    • 双1次補間モデルに基づくテンプレートマッチングの検出精度, 山田芳郎, 都築伸二, 映像情報メディア学会冬季大会講演予稿集, 1999, 39, 19991209, 1343-4357, http://jglobal.jst.go.jp/public/200902113959789550
    • 1-7 Detection Accuracy of Bilinear Interpolation Model Based Template Matching, YAMADA Yoshio, TUZUKI Shinji, ITE Winter Annual Convention, 一般社団法人映像情報メディア学会, 映像情報メディア学会冬季大会講演予稿集, 1999, 19991209, 13434357, http://ci.nii.ac.jp/naid/110004054220
    • Continuous template matching method with band-limited interpolation model, Yoshio Yamada, Shinji Tsuzuki, Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers, 53, 1445, 1448, 19991201, 13426907, 10.3169/itej.53.1445, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0039252826&origin=inward
    • Countinuous Template Matching Method with Band-limited Interpolation Model., 山田芳郎, 都築伸二, 映像情報メディア学会誌, 53, 10, 1445, 1448, 19991020, 1342-6907, 10.3169/itej.53.1445, http://jglobal.jst.go.jp/public/200902122678092215
    • Continuous Template Matching Method with Band-limited Interpolation Model, Yamada Yoshio, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 一般社団法人映像情報メディア学会, 映像情報メディア学会誌 : 映像情報メディア, 53, 10, 1445, 1448, 19991020, 13426907, 10.3169/itej.53.1445, http://ci.nii.ac.jp/naid/110003692470, 本稿では, 2つのディジタル画像の間の移動量を高い分解能でもって検出できる連続的なテンプレートマッチング手法を提案している.ここで, 高分解能の検出とは, 標本化間隔に比べて微少な移動量を精密に検出できる能力を意味している.まず, 1次元信号の場合について, 連続的なテンプレートマッチング手法の定式化が行われ, ついで2次元信号への直接的な拡張が与えられている.また, 前処理としての高域通過フィルタリングが, 連続的テンプレートマッチングの精度を保証するために本質的な重要性を持っていることが具体例によって示されている.
    • High Precision Detection of Motion Vectors by Continuous Template Matching., 山田芳郎, 片山江理香, 都築伸二, 映像メディア処理シンポジウム資料, 4th, 57, 58, 19990927, http://jglobal.jst.go.jp/public/200902164009461927
    • 二次元MTRトレリス符号に対するTCPR4の有効性, 田崎三郎, 末包卓也, 都築伸二, 映像情報メディア学会年次大会講演予稿集, 1999, 7, 8, 19990823, 1343-1846, http://jglobal.jst.go.jp/public/200902101443098537
    • 二層垂直磁気記録における再生波形を近似する関数モデルの線形性, 田崎三郎, 本宮正隆, 都築伸二, 映像情報メディア学会年次大会講演予稿集, 1999, 9, 10, 19990823, 1343-1846, http://jglobal.jst.go.jp/public/200902192252389154
    • 1-4 Effectiveness on TCPR4 Method for Two-Dimensional MTR Trellis Code, TAZAKI Saburo, SUEKANE Takuya, TSUZUKI Shinji, Proceedings of the ... ITE annual convention, 一般社団法人映像情報メディア学会, 映像情報メディア学会年次大会講演予稿集, 1999, 7, 8, 19990823, 13431846, http://ci.nii.ac.jp/naid/110006415422, MTR(maximum transition run)code is highly rated under the recent demand on higher density recording. In this paper, we introduce two-dimensional simplest MTR code with trellis function and investigate the effectiveness of the combination with TCPR4(trellis coded partial response 4) ML and this code, where the simplest means that all of more than three continuous level transition pattern are removed from the write-in waveform. The results show that bit error rate with this combination can hold the superiority over the combination with conventional PRML and this code.
    • A Simple Algorithm for Motion Detection with Affine Transform Model., 山田芳郎, 都築伸二, 映像情報メディア学会誌, 53, 6, 913, 916, 19990620, 1342-6907, 10.3169/itej.53.913, http://jglobal.jst.go.jp/public/200902163144615660
    • A Simple Algorithm for Motion Detection with Affine Transform Model, Yamada Yoshio, Tsuzuki Shinji, The journal of the Institute of Image Information and Television Engineers, 一般社団法人映像情報メディア学会, 映像情報メディア学会誌 : 映像情報メディア, 53, 6, 913, 916, 19990620, 13426907, 10.3169/itej.53.913, http://ci.nii.ac.jp/naid/110003692620, 回転や伸縮のような複雑な動きであっても, 回転角度が比較的小さく, かつ伸縮率が1に近い場合には, ブロックマッチングによって「見かけの平行移動ベクトル」を近似的に検出できる.また, このような見かけの平行移動ベクトルの場を観測することによって, 対応するアフィン変換パラメータが検出可能である.本論文では, アフィン変換モデルによって記述されるフレーム間の動きを上述の原理に基づいて簡易に検出するための手法を提案している.
    • Development of 32/33(0,10/10) Code used Simple Coding Rule., 田崎三郎, 原直人, 都築伸二, 電子情報通信学会技術研究報告, 99, 113(MR99 6-9), 1, 6, 19990611, 0913-5685, http://jglobal.jst.go.jp/public/200902136875688651
    • Development of 32/33 (0, 10/10) Code used Simple Codirng Rule, TAZAKI Saburo, HARA Naoto, TSUZUKI Sinji, IEICE technical report. Magnetic recording, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. MR, 磁気記録, 99, 113, 1, 6, 19990611, 09135685, http://ci.nii.ac.jp/naid/110003186460, One of ceaseless requiremnents toward recording code is the improvement on the coding rate, η=m/n, where m and n are dataword and codeword lengths, respectively. However, design problems accompany with these trends such that the longer m and n, the more complicate coding rules and coding/decoding circuit structures. In this paper, we solve them by developing a new design method in which every datawords are firstly divided more than three subdatawords and the coding rule is constructed with suitably combining those. As the examples of this method, we design 32/33(0,10/10) code.
    • Development of 32/33(0, 10/10)Code used Simple Coding Rule, TAZAKI Saburo, HARA Naoto, TSUZUKI Sinji, ITE Technical Report, 一般社団法人映像情報メディア学会, 映像情報メディア学会技術報告, 23, 38, 1, 6, 19990611, 13426893, http://ci.nii.ac.jp/naid/110003686871, One of ceaseless requirements toward recording code is the improvement on the coding rate, η=m/n, where m and are dataword and codeword lengths, respectively, However, design problems accompany with these trends such that the longer m and n, the more complicate coding rules and coding/decoding circuit structures. In this paper, we solve them by developing a new design method in which every datawords are firstly divided more than three subdatawords and the coding ruls is constructed with suitably combining those. As the examples of this method, we design 32/33(0, 10/10)code.
    • 光磁気記録システムのための4値記録符号の一検討, 田崎三郎, 池内宗基, 都築伸二, 電子情報通信学会大会講演論文集, 1999, 31, 19990308, 1349-1369, http://jglobal.jst.go.jp/public/200902105179356412
    • A Consideration on Quaternary Code for Magneto-Optical Recording System, TAZAKI Saburo, IKEUCHI Muneki, TSUZUKI Shinji, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 1999, 2, 19990308, http://ci.nii.ac.jp/naid/110003254689
    • Topics on Residential Data Communications by Power Line., 都築伸二, 田崎三郎, 山田芳郎, 電子情報通信学会技術研究報告, 98, 615(SAT98 95-106), 81, 88, 19990219, 0913-5685, http://jglobal.jst.go.jp/public/200902140296838991
    • Topics on Residential Data Communications by Power Line, TSUZUKI Shinji, TAZAKI Saburo, YAMADA Yoshio, Technical report of IEICE. SAT, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SAT, 衛星通信, 98, 615, 81, 88, 19990219, http://ci.nii.ac.jp/naid/110003193531, Owing to the progress of digitization of multimedia information handled in home, networking in home (referred to as home networks), which includes networks to control household appliances, will also progress. In this paper, home networks are divided into two categories of the high-speed backbone network and control network, and the trends of the respective networks are described. As the control network, power line communications (PLCs)are promising. First, the characteristics of residential power lines are explained. Second, spread spectrum modulation is picked out as a suitable technique for the PLCs, and a newly developed spreading sequence is introduced for the modulation. By using the sequence, simple hardware, i. e. , baseband transmission, without complicated carrier modulation will be possible. Moreover, an efficient transmission can be expected since the shape of sequence's signal spectrum can be controlled easily.
    • A Study of Two-Dimensional MTR Trellis Code on the Coding Rate 2/3., 田崎三郎, 末包卓也, 都築伸二, 電子情報通信学会技術研究報告, 98, 548(MR98 56-59), 17, 24, 19990122, 0913-5685, http://jglobal.jst.go.jp/public/200902104240490546
    • A Consideration on 8/9, 16/17, 24/25 Code used Simple Coding Rule., 田崎三郎, 原直人, 都築伸二, 電子情報通信学会技術研究報告, 98, 548(MR98 56-59), 25, 30, 19990122, 0913-5685, http://jglobal.jst.go.jp/public/200902109638942872
    • A Study of Two-Dimensional MTR Trellis Code on the Coding Rate 2/3, TAZAKI Saburo, SUEKANE Takuya, TSUZUKI Shinji, IEICE technical report. Magnetic recording, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. MR, 磁気記録, 98, 548, 17, 24, 19990122, http://ci.nii.ac.jp/naid/110003186400, Recently in order to attain higher recording density, MTR codes have actively studied in which three or more consecutive transition patterns of polarity level are forced to eliminate from code sequence. Additionally, two-dimensional codes have a growing interest in the improvement of areal density with the betterment of track density. In this paper we propose an algorithm for designing two-dimensional MTR trellis code which has both merits of MTR and two-dimension, and also a good property of trellis function. A new two-dimensional MTR trellis code having coding rate η=2/3 is developed by using this algorithm and is compared the bit error rate(BER)with an one-dimensional MTR code which has the same coding rate. The result shows that the former code gains about an 7.2dB required S/N advantage over the latter code at the normalized density K=3.0 and BER=10^<-5>.
    • A Consideration on 8/9, 16/17, 24/25 Code used Simple Coding Rule, TAZAKI Saburo, HARA Naoto, TSUZUKI Shinji, IEICE technical report. Magnetic recording, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. MR, 磁気記録, 98, 548, 25, 30, 19990122, http://ci.nii.ac.jp/naid/110003186401, One of ceaseless requirements toward recording code is the improvement on the coding rete, η=m/n, where m and n are dataword and codewored lengths, respectively. In fact, η(d, k) constraints of practical codes have been shifted with the manner as 1/2(2, 7)→2/3(1, 7)→8/9(0, 4)→16/17(0, 6), where d and k are the minimum and maximum run lenghts, respectively. However, problems accompany with these shifts such that the longer m and n, the more complicate coding rules and coding/decoding circuit structures. In this paper, we solve these problems by developing a new design technique in which every datawords are firstly divided more than three subdatawords and the coding rule is constructed with suitably combining these subdatawords. As the examples of this method, we design 8/9, 16/17 and 24/25 codes, respectively.
    • 高速電力線搬送のための線路伝達特性の測定, 都築伸二, 山本心司, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1999, 187, 19990000, http://jglobal.jst.go.jp/public/200902140752919206
    • 連続的テンプレートマッチングの検出誤差の評価, 山田芳郎, 片山江理香, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1999, 223, 19990000, http://jglobal.jst.go.jp/public/200902153793683831
    • 1-4 Effectiveness on TCPR4 Method for Two-Dimensional MTR Trellis Code, TAZAKI Saburo, SUEKANE Takuya, TSUZUKI Shinji, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, The Institute of Image Information and Television Engineers, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, 1999, 0, 7, 8, 19990000, http://ci.nii.ac.jp/naid/130005673105, MTR(maximum transition run)code is highly rated under the recent demand on higher density recording. In this paper, we introduce two-dimensional simplest MTR code with trellis function and investigate the effectiveness of the combination with TCPR4(trellis coded partial response 4) ML and this code, where the simplest means that all of more than three continuous level transition pattern are removed from the write-in waveform. The results show that bit error rate with this combination can hold the superiority over the combination with conventional PRML and this code.
    • ISBN4-339-00706-4, 19990000
    • 43, 12, 637, 643, 19990000, 10.11509/isciesci.43.12_637
    • XVIII, 171, 179, 19990000
    • Study on channel utilization and delay performance optimization of carrier sense CDMA protocol, TSUZUKI Shinji, OHTSUKA Shigeki, YAMADA Yoshio, TAZAKI Saburo, IEICE technical report. Image engineering, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IE, 画像工学, 98, 484, 1, 8, 19981217, http://ci.nii.ac.jp/naid/110003194985, Ethernet is based on the carrier sense multiple access with collision detection (CSMA/CD) protocol. Although this protocol is widely used in local area networks (LANs), it has a problem. The throughput and packet-delay performances degrade rapidly when the offered loads of packets become high. As a solution to the problem, we have proposed a protocol referred to as carrier sense spread spectrum with overload detection (CSSS/OD), which is a direct sequence - code devision multiple access (DS - CDMA) based protocol with a carrier sensing function and changes the spreading factor adaptively depending on network loads to improve the conventional Ethernet's performance. In this paper, we show its optimized performances of the channel utilization and the delay time.
    • A Proposal of continuous Template Matching Method with Band-limited Interpolation Model, Yamada Yoshio, Sawada Natsuki, Tsuzuki Shinji, Tazaki Saburo, IEICE technical report. Image engineering, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IE, 画像工学, 98, 484, 29, 36, 19981217, http://ci.nii.ac.jp/naid/110003194989, This paper proposes a continuous template matching technique aiming at a high-resolution detection of displacements between two digital images, wherein the high-resolution detection means the ability to detect very small displacement as compared with sampling period. Several key equations are developed and discussed for the continuous template matching methods with the band-limited interpolation model and bi-linear interpolation model. It is also discussed that the pre-filtering using HPF is essential for ensuring the precision of the continuous template matching method.
    • Study on channel utilization and delay performance optimization of carrier sense CDMA protocol, TSUZUKI Shinji, OHTSUKA Shigeki, YAMADA Yoshio, TAZAKI Saburo, IEICE technical report. Communication systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CS, 通信方式, 98, 482, 1, 8, 19981217, http://ci.nii.ac.jp/naid/110003282678, Ethernet is based on the carrier sense multiple access with collision detection(CSMA/CD)protocol. Although this protocol is widely used in local area networks(LANs), it has a problem. The throughput and packet-delay performances degrade rapidly when the offered loads of packets become high. As a solution to the problem, we have proposed aprotocol referred to as carrier sense spread spectrum with overload detection (CSSS/OD), which is a direct sequence-code devision multiple access(DS-CDMA)based protocol with a carrier sensing function and changes the spreading factor adaptively depending on network loads to improve the conventional Ethernet's performance. In this paper, we show its optimized performances of the channel utilization and the delay time.
    • A Proposal of Continuous Template Matching Method with Band-limited Interpolation Model, Yamada Yosio, Sawada Natsuki, Tsuzuki Shinji, Tazaki Saburo, IEICE technical report. Communication systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CS, 通信方式, 98, 482, 29, 36, 19981217, http://ci.nii.ac.jp/naid/110003282682, This paper proposes a continuous template matching technique aiming at a high-resolution detection of displacements between two digital images, wherein the high-resolution detection means the ability to detect very small displacement as compared with sampling period. Several key equations are developed and discussed for the continuous template matching methods with the band-limited interpolation model and bi-linear interpolation model. It is also discussed that the pre-filtering using HPF is essential for ensuring the precision of the continuous template matching method.
    • Study on channel utilization and delay performance optimization of carrier sense CDMA protocol, TSUZUKI Shinji, OHTSUKU Shigeki, YAMADA Yoshio, TAZAKI Saburo, ITE Technical Report, 一般社団法人映像情報メディア学会, 映像情報メディア学会技術報告, 22, 71, 1, 8, 19981217, 13426893, http://ci.nii.ac.jp/naid/110003690308, Ethernet is based on the carrier sense multiple access with collision detection (CSMA/CD) protocol. Although this protocol is widely used in local area networks (LANs), it has a problem. The throughput and packet-delay performances degrade rapidly when the offered loads of packets become high. As a solution to the problem, we have proposed a protocol referred to as carrier sense spread spectrum with overload detection (CSSS/OD), which is a direct sequence-code devision multiple access (DS-CDMA) based protocol with a carrier sensing function and changes the spreading factor adaptively depending on network loads to improve the conventional Ethernet's performance. In this paper, we show its optimised performances of the channel utilization and the delay time.
    • A Proposal of Continuous Template Matching Method with Band-limited Interpolation Model, Yamada Yoshio, Sawada Natsuki, Tsuzuki Shinji, Tazaki Saburo, ITE Technical Report, 一般社団法人映像情報メディア学会, 映像情報メディア学会技術報告, 22, 71, 29, 36, 19981217, 13426893, http://ci.nii.ac.jp/naid/110003690312, This paper proposes a continuous template matching technique aiming at a high-resolution detection of displacements between two digital images, wherein the high-resolution detection means the ability to detect very small displacement as compared with sampling period. Several key equations are developed and discussed for the continuous template matching methods with the band-limited interpolation model and bi-linear interpolation model. It is also discussed that the pre-filtering using HPF is essential for ensuring the precision of the continuous template matching method.
    • Two-Dimensional Coding for The Perpendicular with MR head and Double Layered Medium, TAZAKI Saburo, OOBAYASHI Hiroaki, ODA Yoshimasa, TSUZUKI Sihji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. MR, 磁気記録, 98, 454, 1, 6, 19981210, http://ci.nii.ac.jp/naid/110003186343, This paper proposes a new model of approximated function under the fidelity to the read-back waveform on perpendicular magnetic recording using MR head and double layered medium and compares the performance with the conventional model with integlation format of Lorentzian function at higher density storage. We apply two recording codes for the performance comparison of both models : classical 2/3(1, 7)code and 5/4(2, k_y=4;L=3)code where L means the number of multi-track. As to 2/3(1, 7)code, our proposed model shows a little superiority to conventional model with required SN ratio at BER=10^<-5>. However, as for 5/4(2, 4;3)code, the difference on the performance between both models isn't clear even though their required SN ratio at BER=10^<-5> is better about 5dB than those of 2/3(1, 7)code.
    • Two-Dimensional Coding for The Perpendicular with MR head and Double Layered Medium, TAZAKI Saburo, OOBAYASHI Hiroaki, ODA Yoshimasa, TSUZUKI Sinji, YAMADA Yoshio, ITE Technical Report, 一般社団法人映像情報メディア学会, 映像情報メディア学会技術報告, 22, 69, 1, 6, 19981210, 13426893, http://ci.nii.ac.jp/naid/110003690283, This paper proposes a new model of approximated function under the fidelity to the read-back waveform on perpendicular magnetic recording using MR head and double layered medium and compares the performance with the conventional model with integlation format of Lorentzian function at higher density storage. We apply two recording codes for the performance comparison of both models : classical 2/3 (1,7) code and 5/4 (2,k_v=4 ; L=3) code where L means the number of multi-track. As to 2/3 (1,7) code, our proposed model shows a little superiority to conventional model with required SN ratio at BER=10^<-5>. However, as for 5/4 (2,4 ; 3) code, the difference on the performance between both models isn't clear even though their required SN ratio at BER=10^<-5> is better about 5dB than those of 2/3 (1,7) code.
    • Two-Dimensional Coding for The Perpendicular with MR head and Double Layered Medium., 田崎三郎, 大林弘明, 小田祥正, 都築伸二, 山田芳郎, 映像情報メディア学会技術報告, 22, 69(VIR98 47-54), 1, 6, 19981200, 1342-6893, http://jglobal.jst.go.jp/public/200902114009623881
    • A Proposal of Continuous Template Matching Method with Band-limited Inperpolation Model., 山田芳郎, 沢田夏樹, 都築伸二, 田崎三郎, 映像情報メディア学会技術報告, 22, 71(BCS98 71-88), 29, 36, 19981200, 1342-6893, http://jglobal.jst.go.jp/public/200902195390168761
    • Study on channel utilization and delay performance optimization of carrier sense CDMA protocol., 都築伸二, 大塚繁樹, 山田芳郎, 田崎三郎, 映像情報メディア学会技術報告, 22, 71(BCS98 71-88), 1, 8, 19981200, 1342-6893, http://jglobal.jst.go.jp/public/200902199023378453
    • Construction of Quaternary Code for Magneto-Optical Recording System using Double-layer Media, TAZAKI Saburo, IKEUCHI Muneki, TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the ... ITE annual convention, 一般社団法人映像情報メディア学会, 映像情報メディア学会年次大会講演予稿集, 1998, 122, 123, 19981029, 13431846, http://ci.nii.ac.jp/naid/110004067021, The use of multi-layer media has been expected to improve linear recording density on magneto-optical (MO) system. However, the conventional technique for MO system using double-layer media is obliged to bring the large change of magnetic field with the transition on recording level. This paper proposes a new method how to construct a quaternary code for it in which we can deal successfully with such problem.
    • Function Model of Readback Waveform for Perpendicular Magnetic Recording using Double Layer Media with MR head, TAZAKI Saburo, OOBAYASHI Hiroaki, TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the ... ITE annual convention, 一般社団法人映像情報メディア学会, 映像情報メディア学会年次大会講演予稿集, 1998, 124, 125, 19981029, 13431846, http://ci.nii.ac.jp/naid/110004067022, It is well known that the readback waveform of perpendicular magnetic recording system using double layer media with MR head closely resembles the write-in waveform in shape like optical recording system. In this paper, we examine to model explicity readback waveform by mathmatical function from the aspect of both time and frequency domains.
    • Bit Error Rate Comparison of Two-Dimensional Codes considering the Rate Improvement of Tracks, TAZAKI Saburo, ODA Yoshimasa, TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the ... ITE annual convention, 一般社団法人映像情報メディア学会, 映像情報メディア学会年次大会講演予稿集, 1998, 130, 131, 19981029, 13431846, http://ci.nii.ac.jp/naid/110004067025, The two-dimensional code has fundamentally an ability of improvement on the rate of track(η_r) beyond 1.0. In this paper, we have developed the codes with large η_r, and compared bit error rate with the conventional 1/2(2,7)RLL code. The results show the superiority of the two-dimensional codes to the one-dimensional codes like 1/2(2,7)RLL code at high linear density.
    • A Proposal on 24/25 (0,8) Code, Tazaki Saburo, Ogata Kenji, Kozai Hideyuki, Tsuzuki Shinji, Yamada Yoshio, Proceedings of the ... ITE annual convention, 一般社団法人映像情報メディア学会, 映像情報メディア学会年次大会講演予稿集, 1998, 134, 135, 19981029, 13431846, http://ci.nii.ac.jp/naid/110004067027, A new code which is called 24/25(0,8) code with κ-constraint (κ=8) is presented. This code can be improved the code rate property over both the conventional 8/9(0,4/4) code and 16/17(0,6/6) code. In order to construct this code, we develop an simple, but effective idea on which each data word is divided into several sub-words having the same length, and then they are converted into the corresponding partial-codewords, respectively.
    • Required SNR Comparison of TCPR(1,1) System and TCPR(1,-1) System, TAZAKI Saburo, SUEKANE Takuya, TSUZUKI Shinji, YAMADA Yoshio, Proceedings of the ... ITE annual convention, 一般社団法人映像情報メディア学会, 映像情報メディア学会年次大会講演予稿集, 1998, 136, 137, 19981029, 13431846, http://ci.nii.ac.jp/naid/110004067028, TCPR(Trellis coded partial response) system is well known a fundamental idea for improving code gain deseribed by minimum free Euclidean distance. In this paper, we firstly study required SNR characteristics of both TCPR(1,1) and TCPR(1,-1) systems on the code rate η=4/5 and bit error rate BER=10^<g;-5>. The simulation results show the superiority of TCPR(1,1) system. Secondarily, we investigate the dependency of the code rate on TCRP(1,1) system and confirm that the trend becomes remarkably at the normalized linear density K〓2.4.
    • Detection Error in Template Matching due to Spacial Aliasing., 山田芳郎, 都築伸二, 田崎三郎, 映像メディア処理シンポジウム資料, 3rd, 51, 52, 19981000, http://jglobal.jst.go.jp/public/200902140545811926
    • Detection Error Rate Characteristics in Template Matching with Pixel Resolution., 山田芳郎, 沢田夏樹, 都築伸二, 田崎三郎, 映像メディア処理シンポジウム資料, 3rd, 25, 26, 19981000, http://jglobal.jst.go.jp/public/200902196642329824
    • A Proposal on 24/25(0,8) Code., 田崎三郎, 尾形賢二, 香西英之, 都築伸二, 山田芳郎, 映像情報メディア学会年次大会講演予稿集, 1998, 134, 135, 19980700, 1343-1846, http://jglobal.jst.go.jp/public/200902103560066363
    • Function Model of Readback Waveform for Perpendicular Magnetic Recording using Double Layer Media with MR head., 田崎三郎, 大林弘明, 都築伸二, 山田芳郎, 映像情報メディア学会年次大会講演予稿集, 1998, 124, 125, 19980700, 1343-1846, http://jglobal.jst.go.jp/public/200902105307388675
    • Construction of Quaternary Code for Magneto-Optical Recording System using Double-layer Media., 田崎三郎, 池内宗基, 都築伸二, 山田芳郎, 映像情報メディア学会年次大会講演予稿集, 1998, 122, 123, 19980700, 1343-1846, http://jglobal.jst.go.jp/public/200902122181970812
    • Bit Error Rate Comparison of Two-Dimensional Codes considering the Rate Improvement of Tracks., 田崎三郎, 小田祥正, 都築伸二, 山田芳郎, 映像情報メディア学会年次大会講演予稿集, 1998, 130, 131, 19980700, 1343-1846, http://jglobal.jst.go.jp/public/200902129229343542
    • Required SNR Comparison of TCPR(1,1) System and TCPR(1,-1) System., 田崎三郎, 末包卓也, 都築伸二, 山田芳郎, 映像情報メディア学会年次大会講演予稿集, 1998, 136, 137, 19980700, 1343-1846, http://jglobal.jst.go.jp/public/200902132983326531
    • A Proposal of a Stream Data Gateway with Carrier Sense Multi-rate CDMA Protocol., 都築伸二, 大塚繁樹, 山田芳郎, 田崎三郎, 電子情報通信学会技術研究報告, 98, 113(SST98 10-16), 31, 36, 19980619, 0913-5685, http://jglobal.jst.go.jp/public/200902157773816539
    • A Proposal of Stream Data Gateway with Carrier Sense Multi-rate CDMA Protocol, TSUZUKI Shinji, OHTSUKA Shigeki, YAMADA Yoshio, TAZAKI Saburo, Technical report of IEICE. SAT, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SAT, 衛星通信, 98, 115, 31, 36, 19980619, http://ci.nii.ac.jp/naid/110003193461, Ethernet is based on CSMA/CD(Carrier Sense Multiple Access with Collision Detection)protocol. Although this protocol is widely used in local area networks(LANs), it has a problem. The throughput and packet-delay performances degrade rapidly when the offered loads of packets become high. As a solution to the problem, we have proposed CSSS/OD(Carrier Sense Spread Spectrum with Overload Detection)protocol, which is a DS/CDMA(Direct Sequence/Code Devision Multiple Access)based protocol with a carrier sensing function and changes the spreading factor adaptively depending on network loads to improve the conventional Ethernet's performance. In this paper, we propose a stream data gateway as its application, and show its preliminarily examined performances. The gateway is assumed to relay stream data such as voice and video from their servers in the Internet to a 10BASE2-Ethernet segment where clients are connected.
    • A Proposal of Stream Data Gateway with Carrier Sense Multi-rate CDMA Protocol, TSUZUKI Shinji, OHTSUKA Shigeki, YAMADA Yoshio, TAZAKI Saburo, Technical report of IEICE. SST, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SST, スペクトル拡散, 98, 113, 31, 36, 19980619, 09135685, http://ci.nii.ac.jp/naid/110003289700, Ethernet is based on CSMA/CD(Carrier Sense Multiple Access with Collision Detection)protocol. Although this protocol is widely used in local area networks(LANs), it has a problem. The throughput and packet-delay performances degrade rapidly when the offered loads of packets become high. As a solution to the problem, we have proposed CSSS/OD(Carrier Sense Spread Spectrum with Overload Detection)protocol, which is a DS/CDMA(Direct Sequence/Code Devision Multiple Access)based protocol with a carrier sensing function and changes the spreading factor adaptively depending on network loads to improve the conventional Ethernet's performance. In this paper, we propose a stream data gateway as its application, and show its preliminarily examined performances. The gateway is assumed to relay stream data such as voice and video from their servers in the Internet to a 10BASE2-Ethernet segment where clients are connected.
    • Continuous Template Matching with Bilinear Interpolation Filter, YAMADA Yoshio, TSUZUKI Shinji, TAZAKI Saburo, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 1998, 2, 19980306, http://ci.nii.ac.jp/naid/110003253144
    • A Study of CSMA/CD-CSSS/OD Switching Protocol's Implementation, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 1998, 19980306, http://ci.nii.ac.jp/naid/110003261367
    • Continuous Template Matching with Bilinear Interpolation Filter., 山田芳郎, 都築伸二, 田崎三郎, 電子情報通信学会大会講演論文集, 1998, 168, 19980300, 1349-1369, http://jglobal.jst.go.jp/public/200902172271022716
    • A Study of CSMA/CD-CSSS/OD Switching Protocol's Implementation., 都築伸二, 山田芳郎, 田崎三郎, 電子情報通信学会大会講演論文集, 1998, 197, 19980300, 1349-1369, http://jglobal.jst.go.jp/public/200902192457773119
    • Improvement of Detection Error Rate in Template Matching with Pixel Resolution., 山田芳郎, 沢田夏樹, 都築伸二, 田崎三郎, 電気関係学会四国支部連合大会講演論文集, 1998, 230, 19980000, http://jglobal.jst.go.jp/public/200902196082992891
    • Bit Error Rate Comparison of Two-Dimensional Codes considering the Rate Improvement of Tracks, TAZAKI Saburo, ODA Yoshimasa, TSUZUKI Shinji, YAMADA Yoshio, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, The Institute of Image Information and Television Engineers, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, 1998, 0, 130, 131, 19980000, http://ci.nii.ac.jp/naid/130005672754, The two-dimensional code has fundamentally an ability of improvement on the rate of track(η_r) beyond 1.0. In this paper, we have developed the codes with large η_r, and compared bit error rate with the conventional 1/2(2,7)RLL code. The results show the superiority of the two-dimensional codes to the one-dimensional codes like 1/2(2,7)RLL code at high linear density.
    • Required SNR Comparison of TCPR(1,1) System and TCPR(1,-1) System, TAZAKI Saburo, SUEKANE Takuya, TSUZUKI Shinji, YAMADA Yoshio, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, The Institute of Image Information and Television Engineers, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, 1998, 0, 136, 137, 19980000, http://ci.nii.ac.jp/naid/130005672752, TCPR(Trellis coded partial response) system is well known a fundamental idea for improving code gain deseribed by minimum free Euclidean distance. In this paper, we firstly study required SNR characteristics of both TCPR(1,1) and TCPR(1,-1) systems on the code rate η=4/5 and bit error rate BER=10^<g;-5>. The simulation results show the superiority of TCPR(1,1) system. Secondarily, we investigate the dependency of the code rate on TCRP(1,1) system and confirm that the trend becomes remarkably at the normalized linear density K〓2.4.
    • A Proposal on 24/25 (0,8) Code, Tazaki Saburo, Ogata Kenji, Kozai Hideyuki, Tsuzuki Shinji, Yamada Yoshio, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, The Institute of Image Information and Television Engineers, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, 1998, 0, 134, 135, 19980000, http://ci.nii.ac.jp/naid/130005672748, A new code which is called 24/25(0,8) code with κ-constraint (κ=8) is presented. This code can be improved the code rate property over both the conventional 8/9(0,4/4) code and 16/17(0,6/6) code. In order to construct this code, we develop an simple, but effective idea on which each data word is divided into several sub-words having the same length, and then they are converted into the corresponding partial-codewords, respectively.
    • Function Model of Readback Waveform for Perpendicular Magnetic Recording using Double Layer Media with MR head, TAZAKI Saburo, OOBAYASHI Hiroaki, TSUZUKI Shinji, YAMADA Yoshio, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, The Institute of Image Information and Television Engineers, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, 1998, 0, 124, 125, 19980000, http://ci.nii.ac.jp/naid/130005672735, It is well known that the readback waveform of perpendicular magnetic recording system using double layer media with MR head closely resembles the write-in waveform in shape like optical recording system. In this paper, we examine to model explicity readback waveform by mathmatical function from the aspect of both time and frequency domains.
    • Construction of Quaternary Code for Magneto-Optical Recording System using Double-layer Media, TAZAKI Saburo, IKEUCHI Muneki, TSUZUKI Shinji, YAMADA Yoshio, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, The Institute of Image Information and Television Engineers, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, 1998, 0, 122, 123, 19980000, http://ci.nii.ac.jp/naid/130005672732, The use of multi-layer media has been expected to improve linear recording density on magneto-optical (MO) system. However, the conventional technique for MO system using double-layer media is obliged to bring the large change of magnetic field with the transition on recording level. This paper proposes a new method how to construct a quaternary code for it in which we can deal successfully with such problem.
    • XVII, 91, 100, 19980000
    • 2, 483, 486, 19980000
    • Example of a two-dimensional code satisfying the relationship kPermalink(マイポータルリンク)(英)
  • Modified antisymmetric M sequence and its periodic correlation property, Shinji Tsuzuki, Susumu Yoshida, Saburo Tazaki, Yoshio Yamada, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, E80-A, 2180, 2190, 19971201, 09168508, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0031271730&origin=inward, In this paper we discuss the binary spreading sequences whose spectral distributions are DC free and spectral distribution's shapes can be easily controlled by a certain parameter denoted by 6. The newly developed sequences, referred to as modified antisymmetric M-sequences, are modified-versions of the conventional antisymmetric (AS) M-sequences. The proposed sequences are designed to increase the varieties of spectral distribution's shapes and improve the correlation properties when compared to those of the FM coded M-sequences which have already proposed by Tsuzuki et al. Some typical line coded M-sequences, i.e. the (differential) Manchester coded M-sequences and the FM coded M-sequences, and the conventional AS M-sequences are included in the set of proposed sequences. The improvement of the average BER (bit error rate) performance for asynchronous DS/SSMA (direct sequence/spread spectrum multiple access) systems using the proposed sequences in comparison to the system using the conventional AO/LSE (auto-optimal phase with least sidelobe energy) M-sequences is also shown.
  • Synchronization of Voice Data on Asynchronous Networks and its Implementation for a VSAT Channel Router., 都築伸二, 山田芳郎, 田崎三郎, 吉田進, 電気学会論文誌 C, 117-C, 11, 1557, 1565, 19971100, 0385-4221, http://jglobal.jst.go.jp/public/200902162279630540
  • Synchronization of Voice Data on Asynchronous Networks and its Implementation for a VSAT Channel Router, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, YOSHIDA Susumu, The Transactions of the Institute of Electrical Engineers of Japan. C, 電気学会, 電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society, 117, 11, 1557, 1565, 19971100, 03854221, http://ci.nii.ac.jp/naid/10002812066
  • Improvement on the Storage Complexity in Two-Step Nearest Neighbor Search Algorithm., 山田芳郎, 永浜秀法, 都築伸二, 田崎三郎, 電子情報通信学会大会講演論文集, 1997, 100, 19970900, 1349-1369, http://jglobal.jst.go.jp/public/200902183475716220
  • Improvement on the Storage Complexity in Two-Step Nearest Neighbor Search Algorithm, YAMADA Yoshio, NAGAHAMA Hidenori, TSUZUKI Shinji, TAZAKI Saburo, Proceedings of the Society Conference of IEICE, 一般社団法人電子情報通信学会, 電子情報通信学会ソサイエティ大会講演論文集, 1997, 19970813, http://ci.nii.ac.jp/naid/110003341075, スカラ量子化器を前置量子化器として用いた2段階探索手法においては, 前段のスカラ量子化によって, 最近傍となり得る候補の符号語の集合を絞り込む. これによって, 後段の最近傍探索の計算効率が著しく向上するが, 候補符号語のインデックスを記憶しておくための表が必要となる. 本稿では, 演算量を犠牲にすることなく, インデックス表の大きさを削減するための手法を提案する.
  • Precision Template Matching with Band-limited Interpolation Model, YAMADA Yoshio, TSUZUKI Shinji, TAZAKI Saburo, Proceedings of the ... ITE annual convention, 一般社団法人映像情報メディア学会, 映像情報メディア学会年次大会講演予稿集, 1997, 305, 306, 19970729, 13431846, http://ci.nii.ac.jp/naid/110004066887, This paper proposes a new technique for precision template matching, wherein the translations between the input image and the template are detected with fractional pixel resolution. Assuming the band-limited interpolation model, several equations and their approximations are derived for one- and two-dimensional template matching cases.
  • A proposal of a carrier sensing SSMA protocol working complementarily to Ethernet., 都築伸二, 大塚繁樹, 山田芳郎, 田崎三郎, 電子情報通信学会技術研究報告, 97, 208(IT97 24-40), 49, 54, 19970725, 0913-5685, http://jglobal.jst.go.jp/public/200902100503027670
  • A proposal of a carrier sensing SSMA protocol working complementarily to Ethernet, TSUZUKI Shinji, OHTSUKA Shigeki, YAMADA Yoshio, TAZAKI Saburo, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, 97, 208, 49, 54, 19970725, http://ci.nii.ac.jp/naid/110003197018, Ethernet is based on the CSMA/CD (Carrier Sense Multiple Access with Collision Detection) protocol. Although it is widely used in local area networks, this protocol has a problem, such that the throughput and packet delay performances degrade rapidly when the offered loads of packets become high. As a solution to the problem, we propose the CSSS/OD (Carrier Sense Spread Spectrum with Overload Detection) protocol which works complementarily to CSMA/CD protocol. Although SSMA (Spread Spectrum Multiple Access) is often applied in wireless network environments due to its superior frequency utilization, we study here the possibility of applying the SSMA to wired computer network environments. We adopted the non-persistent CSMA/CD protocol as the conventional protocol, and compared both protocols' performances. As the result, we conclude to propose a hybrid accessing protocol, that is, the CSMA/CD protocol is used during the offered loads of packets being low, but the protocol is switched to CSSS/OD protocol during the offered loads being high.
  • Precision Template Matching with Band-limited Interpolation Model., 山田芳郎, 都築伸二, 田崎三郎, 映像情報メディア学会年次大会講演予稿集, 1997, 305, 306, 19970700, 1343-1846, http://jglobal.jst.go.jp/public/200902175149334544
  • Satellite Communications Experiments by Universities, 高畑 文雄, 小野里 好邦, 嶋本 薫, 初田 健, 三橋 龍一, 青木 由直, 棚橋 真, 村井 純, 佐藤 亨, 木村 磐根, 藤崎 清孝, 大迫 陽二, 立居場 光生, 都築 伸二, 田崎 三郎, 岡 育生, 藤原 値賀人, 越後 宏, 康 健, 大沼 孝一, 佐藤 利三郎, The Journal of the Institute of Electronics, Information, and Communication Engineers, 一般社団法人電子情報通信学会, 電子情報通信学会誌, 80, 5, 435, 456, 19970525, 09135693, http://ci.nii.ac.jp/naid/110003229930, 衛星の高機能化,無線周波数帯Kuバンドの使用,地球局設備の小型化・低廉化,電気通信事業法の改正に伴う民間企業の衛星通信ビジネスの参入などによって, 衛星通信に関する大学独自の実験・研究が可能になったことをふまえ, 大学を中心とした多数の教育機関と電気通信事業者からなる組織化された研究・実験機関である「ディジタル衛星通信の大学間高度共同利用研究協議会」を設立した. 本報告では, 上記協議会について概説した後, 協議会のもとで衛星を介して実施されている主要な実験・研究として, マルチメディア衛星通信, 北海道統合通信網, 知的通信による手話画像伝送, インターネットアーキテクチャにおける衛星通信の利用などを取り上げて, その内容を紹介する.
  • 51, 4, 19970420, 13426907, http://ci.nii.ac.jp/naid/110003691519
  • 51, 4, 19970420, 13426907, http://ci.nii.ac.jp/naid/110003691520
  • 51, 4, 19970420, 13426907, http://ci.nii.ac.jp/naid/110003691521
  • Precision Template Matching with Bilinear Interpolation Model, YAMADA Yoshio, TAZAKI Saburo, TSUZUKI Shinji, Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 1997, 2, 19970306, http://ci.nii.ac.jp/naid/110003249399, 動画像の符号化や信号処理を効率よく実現するためには, フレーム間の動き情報を高い精度で検出することが鍵となる. 画像符号化においては, テンプレート・マッチングに基づいた動き検出/補償手法がよく用いられている. この場合, 補間画像を用いてテンプレート・マッチングを行うことによって, 動きベクトルの検出精度を大幅に改善することが可能である. また, すでに筆者らは, テンプレート・マッチングによって検出される動きベクトルの局所的な変化から, アフィン変換モデルに基づく回転や伸縮などの動きパラメータを簡単な計算によって導出する手法を提案しているが, 同手法においても動きベクトルの検出精度が向上すれば, 回転および伸縮パラメータの検出精度も改善される. そこで本稿では, 補間画像を直接生成すること無く, より高精度のテンプレート・マッチングを実現する手法を提案する.
  • Precision Template Matching with Bilinear Interpolation Model., 山田芳郎, 田崎三郎, 都築伸二, 電子情報通信学会大会講演論文集, 1997, Sogo Pt 7, 61, 19970300, 1349-1369, http://jglobal.jst.go.jp/public/200902101709959746
  • Simplified Anchor Point Method for Fast Nearest Neighbor Search Algorithm., 山田芳郎, 石田光伸, 都築伸二, 田崎三郎, 電子情報通信学会技術研究報告, 96, 476(CAS96 78-88), 71, 76, 19970124, 0913-5685, http://jglobal.jst.go.jp/public/200902153017209330
  • Simplified Anchor Pint Method for Fast Nearest Neighbor Search Algorithm, YAMADA Yoshio, ISHIDA Mitsunobu, Tsuzuki Shinji, TAZAKI Saburo, IEICE technical report. Circuits and systems, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. CAS, 回路とシステム, 96, 476, 71, 76, 19970124, http://ci.nii.ac.jp/naid/110003197943, Huang et al. proposed a fast nearest algorithm in which, based on the triangle inequality, candidate codewords are examined using inter-codeword distance table. Their method requires a large distance table propotional to N(N-1)/2, where N denotes codebook size. Ramasubramanian et al. proposed the anchor point method that improves the memory complexity of Huang's method. This paper propose a simplified anchor point method in order to reduce the overhead of candidate selection, thus computational complexity, in Ramasubramanian's anchor point method.
  • A Method of Reduction of Motion Estimation by Window Function., 山田芳郎, 河西寿幸, 都築伸二, 田崎三郎, 電気関係学会四国支部連合大会講演論文集, 1997, 188, 19970000, http://jglobal.jst.go.jp/public/200902106990630083
  • Reduction of Storage Complexity in Two-Step Nearest Neighbor Search Algorithm., 山田芳郎, 永浜秀法, 都築伸二, 田崎三郎, 電気関係学会四国支部連合大会講演論文集, 1997, 182, 19970000, http://jglobal.jst.go.jp/public/200902117926384275
  • Two-step Nearest Neighbor Search Algorithm with Extended Partial Distortion Search., 山田芳郎, 沢田夏樹, 都築伸二, 田崎三郎, 電気関係学会四国支部連合大会講演論文集, 1997, 185, 19970000, http://jglobal.jst.go.jp/public/200902122245476760
  • Bit Error Rate of DFE/ML for Digital Magnetic Recording., 田崎三郎, 香西英之, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1997, 187, 19970000, http://jglobal.jst.go.jp/public/200902140739930977
  • A study on Hybrid Ethernet protocol of CSMA/CD and a carrier sensing SSMA., 都築伸二, 大塚繁樹, 山田芳郎, 田崎三郎, 電気関係学会四国支部連合大会講演論文集, 1997, 172, 19970000, http://jglobal.jst.go.jp/public/200902146735619140
  • A Trial of Model Description on Ternary Code with .KAPPA.1 and c Constraints., 田崎三郎, 池内宗基, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1997, 15, 19970000, http://jglobal.jst.go.jp/public/200902146906407457
  • Bit Error Rate Performance of TCPR System with a PR(1,1) and PR(1,-1) channel on .ETA.=1/2., 田崎三郎, 末包卓也, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1997, 183, 19970000, http://jglobal.jst.go.jp/public/200902186838844047
  • Bit Error Rate Analysis of Two-Dimensional Code with .KAPPA.y, 田崎三郎, 小田祥正, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1997, 186, 19970000, http://jglobal.jst.go.jp/public/200902189471294214
  • Model Discription of Readback Waveform on Perpendicular Magnetic Recording with MR Head., 田崎三郎, 大林弘明, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1997, 184, 19970000, http://jglobal.jst.go.jp/public/200902197754280263
  • Precision Template Matching with Band-limited Interpolation Model, YAMADA Yoshio, TSUZUKI Shinji, TAZAKI Saburo, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, The Institute of Image Information and Television Engineers, PROCEEDINGS OF THE ITE ANNUAL CONVENTION, 1997, 0, 305, 306, 19970000, http://ci.nii.ac.jp/naid/130005672519, This paper proposes a new technique for precision template matching, wherein the translations between the input image and the template are detected with fractional pixel resolution. Assuming the band-limited interpolation model, several equations and their approximations are derived for one- and two-dimensional template matching cases.
  • 80, 5, 448, 450, 19970000
  • 117-C, 11, 1557, 1565, 19970000
  • 99, 103, 19970000
  • 80, 5, 448, 450, 19970000
  • E80-A, 11, 2180, 2191, 19970000
  • 117-C, 11, 1557, 1565, 19970000
  • S7.2.1-S7.2.7, 19970000
  • ISBN 90-74249-11-6, 99, 103, 19970000
  • 16, 177, 185, 19970000
  • Experiment of Power Line DS/SS Data Transmission using an IFM-V9 coded OL-PN sequence., 沖田亨, 都築伸二, 山田芳郎, 田崎三郎, 電子情報通信学会技術研究報告, 96, 427(SST96 59-67), 35, 39, 19961213, 0913-5685, http://jglobal.jst.go.jp/public/200902198030014010
  • Construction of a Two-Dimensional Code with k < d Property, TAZAKI Saburo, ODA Yoshimasa, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. MR, 磁気記録, 96, 418, 9, 14, 19961213, http://ci.nii.ac.jp/naid/110003186036, One of the major merits that binary two-dimensional codes have over the binary one dimensional codes is the achievement of the property k < d. In this paper, we constructed a practical two-dimensional code based on the Marcellin-Weber's method and derived its state transition diagram. The constraints used in the construction are such that, the track numbers L = 2, k(= k_y) = 1, and d = 2. Additionally, under the same constraints d and k_y, we clearly showed that when L is increased, the property nPermalink(マイポータルリンク)(英)
  • Performance comparison among several ternary and binary codes, TAZAKI Saburo, MOURI Hiroki, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. MR, 磁気記録, 96, 418, 15, 20, 19961213, http://ci.nii.ac.jp/naid/110003186037, In order to accelerate the achievement of high density recording on magneto-optical disk systems, We have developed a new ternary-level recording code called the 8B6T code which is characterises by the constraints d=1, k=4 and c=2. We have also investigated the BER performance of different combinations between recording codes and PRML methods. The performance of the 8B6T code's required CN ratio has been compared with that of the 8B6T, 8B10B and 4B3T codes, respectively. The results show that, the combination between 8B6T code and PR(1, 2, 1) method has the best performance among several combinations.
  • A Consideration on Coordinated Property of Recording Code and Signal Processing Method, TAZAKI Saburo, YANAGIHARA Kenji, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. MR, 磁気記録, 96, 418, 21, 28, 19961213, http://ci.nii.ac.jp/naid/110003186038, Conventionally, the main function of recording codes has been thought to be matching the property of a signal sequence to that of the recording channel. In this paper, we try to use effectively not only the correlation property of PR systems but also that of recording codes. This idea is truly consistent with the TCPR (Trellis Coded Partial Response) method. Firstly, trellis codes which have code efficiency η = 1/2 and 3/4, respectively, have been constructed. Then, a bit error rate (BER) comparison between these coded PR(1,1)ML methods and the non-coded PR(1,1)ML method having η = 1 is given. The results show that the trellis coded method does improve the BER.
  • Experiment of Power Line DS/SS Data Transmission using an IFM-V9 coded OL-PN sequence, OKITA Toru, TSUZUKI Shinji, YAMADA Yoshio, TAZAKI Saburo, Technical report of IEICE. SST, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SST, スペクトル拡散, 96, 427, 35, 39, 19961213, 09135685, http://ci.nii.ac.jp/naid/110003288953, We have already proposed a spreading sequence, referred to as an IFM-V9 coded OL-PN (Overlapped PN) sequence, that is suitable for baseband DS/SSMA systems. We have considered applying it to power line data transmission systems by computer simulation. Now we are implementing it on the real power line to improve the accuracy of the simulation results, and finished data transmission and despreading functions, where the despreading function is on an of-line system. In this paper, the results of those functions are reported. And furthermore, we implemented FSK based modems using a commercial IC specialized for power line, and examined bit error performances. The results are also reported, aimed to compare the performance of DS/SS systems with that of FSK systems in the future.
  • Construction of a Two-Dimensional Code with kPermalink(マイポータルリンク)(英)
  • Performance comparison among several ternary and binary codes on MO recording systems, TAZAKI Saburo, MOURI Hiroki, TSUZUKI Shinji, YAMADA Yoshio, ITEJ Technical Report, 一般社団法人映像情報メディア学会, テレビジョン学会技術報告, 20, 68, 15, 20, 19961213, 03864227, http://ci.nii.ac.jp/naid/110003680641, In order to accelerate the achievement of high density recording on magneto-optical disk systems, We have developed a new ternary-level recording code called the 8B6T code which is characterises by the constraints d=1,k=4 and c=2. We have also investigated the BER performance of different combinations between recording codes and PRML methods. The performance of the 8B6T code's required CN ratio has been compared with that of the 8B6T, 8B10B and 4B3T codes, respectively. The results show that, the combination between 8B6T code and PR (1,2,1) method has the best performance among several combinations.
  • A Consideration on Coordinated Property of Recording Code and Signal Processing Method, TAZAKI Saburo, YANAGIHARA Kenji, TSUZUKI Shinji, YAMADA Yoshio, ITEJ Technical Report, 一般社団法人映像情報メディア学会, テレビジョン学会技術報告, 20, 68, 21, 28, 19961213, 03864227, http://ci.nii.ac.jp/naid/110003680642, Conventionally, the main function of recording codes has been thought to be matching the property of a signal sequence to that of the recording channel. In this paper, we try to use effectively not only the correlation property of PR systems but also that of recording codes. This idea is truly consistent with the TCPR (Trellis Coded Partial Response) method. Firstly, trellis codes which have code efficiency η=1/2 and 3/4,respectively, have been constructed. Then, a bit error rate (BER) comparison between these coded PR (1,1) ML methods and the non-coded PR (1,1) ML method having η=1 is given. The results show that the trellis coded method does improve the BER.
  • BER performance of baseband DS/SSMA using FM coded M sequences in bandwidth limited channels, Shinji Tsuzuki, Saburo Tazaki, Yoshio Yamada, IEEE International Symposium on Spread Spectrum Techniques & Applications, 3, 1102, 1107, 19961201, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0030393354&origin=inward, We discuss the bit error rate (BER) performance of asynchronous baseband DS/SSMA systems using line coded M sequences. As the line codes, we adopt FM family codes that provide M sequences with the DC free spectrum and good correlation properties. It has been already reported that some combinations of three FM coded M sequences provide a better cross-correlation property than that of the preferred pairs of non-coded M sequences. Since their quantitative evaluation in terms of the BER performance improvement due to the line coding has not been done yet, we considered it in this paper. We first derive an equation for the BER analysis, then compare the BER performance of the FM coded M sequences with that of the non-coded M sequences in two bandwidth limited channels, a band pass and a power line channel. In our scenario, the improvement of the required E b/N 0 is 1 dB and 3 dB, respectively. Furthermore we propose a system using FM coded M sequences of different periods simultaneously. This proposed system of the different periods can achieve the channel efficiency 4/3 times better than a system using non-coded M sequences of the same period, while the required E b/N 0 of both systems is almost the same.
  • Construction of a Two-Dimensional Code with k, 田崎三郎, 小田祥正, 都築伸二, 山田芳郎, テレビジョン学会技術報告, 20, 68(VIR96 110-116), 9, 14, 19961200, 0386-4227, http://jglobal.jst.go.jp/public/200902109686610423
  • A Consideration on Coordinated Property of Recording Code and Signal Processing Method., 田崎三郎, 柳原謙志, 都築伸二, 山田芳郎, テレビジョン学会技術報告, 20, 68(VIR96 110-116), 21, 28, 19961200, 0386-4227, http://jglobal.jst.go.jp/public/200902162629951670
  • Performance comparison among several ternary and binary codes., 田崎三郎, 毛利浩喜, 都築伸二, 山田芳郎, テレビジョン学会技術報告, 20, 68(VIR96 110-116), 15, 20, 19961200, 0386-4227, http://jglobal.jst.go.jp/public/200902187943174363
  • An Experimental Operation of the OTP based Remote User Anthentification System., 山田芳郎, 林秀郎, 都築伸二, 田崎三郎, 情報処理学会研究報告, 96, 108(DPS-79), 95, 100, 19961114, 0919-6072, http://jglobal.jst.go.jp/public/200902143292241965
  • An Experimetal Operation of the OTP based Remote User Authentification System, YAMADA Yosio, HAYASHI Hideo, TSUZUKI Shinji, TAZAKI Saburo, IPSJ SIG Notes, 一般社団法人情報処理学会, 情報処理学会研究報告マルチメディア通信と分散処理(DPS), 1996, 108, 95, 100, 19961114, 09196072, http://ci.nii.ac.jp/naid/110002946079, The current IP protocol does not support the encription of the packets at the network layer. This causes some serious difficulties with respect to the system security when the remote logins are done over the Internet. For this purpose, the One-Time Password (OTP) systems, such as the S/KEY system, are proposed. This paper presents an experimental operation of the OTP system in our laboratry, and also discusses a prototype of the user interface of the Telnet client with a built-in OTP based user authentification session.
  • Real Time Voice Communication on Internet-An Experiment of Routing to the VSAT Channel., 都築伸二, HASRITO E, 山田芳郎, 田崎三郎, 吉田進, 電気関係学会関西支部連合大会講演論文集, 1996, G336, 19961100, http://jglobal.jst.go.jp/public/200902199393065080
  • Performance comparisons of multi-level codes for high density MO recording, S. Yoshino, S. Tazaki, S. Tsuzuki, Y. Yamada, IEEE International Conference on Communications, 3, 1538, 1541, 19960101, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0029697121&origin=inward, We discuss the performance of the multi-level codes for high density recording on magneto-optical(MO) disks. The performance of multi-level codes is compared with that of run-length limited (RLL) binary codes using the partial response maximum likelihood (PRML) method. The simulations indicate that the multi-level codes have good performances in the range of high density recording and that the PRML method produces little improvement in the performances of the multi-level codes compared with those of binary-level codes.
  • An Investigation of Two-Dimentional Modulation Codes for k, 田崎三郎, 小田祥正, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1996, 180, 19960000, http://jglobal.jst.go.jp/public/200902100410158007
  • Remote user authentication system with OTP., 山田芳郎, 林秀郎, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1996, 259, 19960000, http://jglobal.jst.go.jp/public/200902101204604790
  • A Study on traffic property of Trunk Reservation method., 都築伸二, 中山勇一, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1996, 159, 19960000, http://jglobal.jst.go.jp/public/200902150228069306
  • An Investigation on 8B6T Code for MO Recording., 田崎三郎, 毛利浩喜, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1996, 194, 19960000, http://jglobal.jst.go.jp/public/200902156802604116
  • A Consideration of TCPR/Wolf-Ungerboeck Method., 田崎三郎, 柳原謙志, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1996, 193, 19960000, http://jglobal.jst.go.jp/public/200902178861486953
  • Experiment Plan for Power Line Data Transmission Performance Comparison between FSK based and DS/SS based Systems., 都築伸二, 沖田亨, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1996, 161, 19960000, http://jglobal.jst.go.jp/public/200902184557549981
  • Detection of Rotation and Scaling Parameters by Generalized Invese., 山田芳郎, 河西寿幸, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1996, 196, 19960000, http://jglobal.jst.go.jp/public/200902184677434800
  • A new implementation of Anchor Point Method., 山田芳郎, 石田光伸, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1996, 195, 19960000, http://jglobal.jst.go.jp/public/200902188459436171
  • Two-Step Nearest Neighbor Search Algorithm with Projection Prequantizer., 山田芳郎, 永浜秀法, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1996, 187, 19960000, http://jglobal.jst.go.jp/public/200902194425064232
  • E78-A, 10, 1127, 1135, 19960000
  • XV, 133, 142, 19960000
  • XV, 143, 150, 19960000
  • A Comparison on the Performance of TCPR and PRML based upon FM Family Codes., 田崎三郎, 柳原謙志, 都築伸二, 山田芳郎, 電子情報通信学会技術研究報告, 95, 402(MR95 68-76), 23, 30, 19951208, 0913-5685, http://jglobal.jst.go.jp/public/200902138147231095
  • Effectiveness of 13B9T codes for MO Recording Systems., 田崎三郎, 毛利浩喜, 都築伸二, 山田芳郎, 電子情報通信学会技術研究報告, 95, 402(MR95 68-76), 31, 38, 19951208, 0913-5685, http://jglobal.jst.go.jp/public/200902198276451410
  • A Comparison on the Performance of TCPR and PRML based upon FM Family Codes, TAZAKI Saburo, YANAGIHARA Kenji, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. MR, 磁気記録, 95, 402, 23, 30, 19951208, http://ci.nii.ac.jp/naid/110003186214, Conventionally, the main function of recording codes has been thought to be matching the property of a signal sequence to that of the recording channel. In this paper, we propose to successfully use another function of the recording codes so as to combine them with the Partial Response (PR) method, and hence describe their coding rule by the trellis diagram. We select four FM family codes whose coding rules can be expressed by applying an automation model. As the PR methods, PR(1,1) and PR(1,0,1) have been selected based on previous reports. Simulation results show that an SN ratio improvement of about 6 dB at a bit error rate of 10^<-4> can be obtained over the conventional PRML methods.
  • Effectiveness of 13B9T codes for MO Recording Systems, TAZAKI Saburo, MOURI Hiroki, TSUZUKI Shinji, YAMADA Yoshio, IEICE technical report. Magnetic recording, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. MR, 磁気記録, 95, 402, 31, 38, 19951208, http://ci.nii.ac.jp/naid/110003186215, We developed a new robust ternary recording code called a 13B9T code, for increasing the recording density in magneto-optical disks. Like the 4B3T code, it satisfies the c constraint property. It also successfully attains a k constraint property which is not possessed in both the 4B3T and 3B2T code. In terms of bit error rate (BER) characteristics, The coding efficiency of this code is 1.44. Since the 3B2T code combined with PR(1,1) method is regarded as the most attractive combination for MO recording systems bit error rate characteristics, we investigated the BER of our new code (13B9T code) for comparison. Computer simulation results show that the developed 13B9T code combined with the PR(1,2,1) method gives a 1.5dB better CN ratio than the 3B2T code with the PR(1,1) method at BER=10^<-4>.
  • A Comparison on the Performance of TCPR and PRML based upon FM Family Codes, TAZAKI Saburo, YANAGIHARA Kenji, TSUZUKI Shinji, YAMADA Yoshio, ITEJ Technical Report, 一般社団法人映像情報メディア学会, テレビジョン学会技術報告, 19, 71, 23, 30, 19951208, 03864227, http://ci.nii.ac.jp/naid/110003680002, Conventionally, the main function of recording codes has been thought to be matching the property of a signal sequence to that of the recording channel. In this paper, we propose to successfully use another function of the recording codes so as to combine them with the Partial Response (PR) method, and hence describe their coding rule by the trellis diagram. We select four FM family codes whose coding rules can be expressed by applying an automaton model. As the PR methods, PR (1,1) and PR (1,0,1) have been selected based on previous reports. Simulation results show that an SN ratio improvement of about 6 dB at a bit error rate of 10^<-4> can be obtained over the conventional PRML methods.
  • Effectiveness of 13B9T codes for MO Recording Systems, TAZAKI Saburo, MOURI Hiroki, TSUZUKI Shinji, YAMADA Yoshio, ITEJ Technical Report, 一般社団法人映像情報メディア学会, テレビジョン学会技術報告, 19, 71, 31, 38, 19951208, 03864227, http://ci.nii.ac.jp/naid/110003680003, We developed a new robust ternary recording code called a 13B9T code, for increasing the recording density in magneto-optical disks. Like the 4B3T code, it satifies the c constraint property. It also sucessfully attains a k constraint property which is not possessed in both the 4B3T and 3B2T code. In terms of bit error rate (BER) characteristics, The coding efficiency of this code is 1.44. Since the 3B2T code combined with PR (1,1) method is regarded as the most attractive combination for MO recording systems bit error rate characteristics, we investigated the BER of our new code (13B9T code) for comparison. Computer simulation results show that the developed 13B9T code combined with the PR (1,2,1) method gives a 1.5dB better CN ratio than the 3B2T code with the PR (1,1) method at BER=10^<-4>.
  • FM family code, Saburo Tazaki, Shinji Tsuzuki, Yoshio Yamada, Conference Record / IEEE Global Telecommunications Conference, 2, 1394, 1401, 19951201, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0029536381&origin=inward, The FM code is a very famous non-block recording code and has already become popular at the dawn of digital magnetic recording. This code still remains available due to the advent of effective signal processing methods such as PRML(Partial Response Maximum Likelihood) up to the recent extremely high density recording age. In this paper we try to develop a systematic and comprehensive investigation of FM family codes.
  • Multiple access performance of differential DS/SS systems for power line data transmission, Shinji Tsuzuki, Kazuki Mizumoto, Saburo Tazaki, Yoshio Yamada, Conference Record / IEEE Global Telecommunications Conference, 2, 1126, 1130, 19951201, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0029535975&origin=inward, Spread spectrum (SS) techniques embedded with the differential decoding method is suitable for the power line data transmissions which have to overcome high noise levels, and uncertain and rapid varying transfer functions. We have proposed a coded PN sequence, which makes it possible to combine maximum-likelihood (ML) decoding techniques with the differential detection method on the receiver's side. In this paper, we compare the cochannel interference and the bit error rate performances of our proposed SSMA (Spread Spectrum Multiple Access) method with those of an already known SS system employing only differential decoding.
  • Effectiveness of 13B9T codes for MO Recording Systems., 田崎三郎, 毛利浩喜, 都築伸二, 山田芳郎, テレビジョン学会技術報告, 19, 71(VIR95 93-101), 31, 38, 19951200, 0386-4227, http://jglobal.jst.go.jp/public/200902132784073705
  • A Comparison on the Performance of TCPR and PRML based upon FM Family Codes., 田崎三郎, 柳原謙志, 都築伸二, 山田芳郎, テレビジョン学会技術報告, 19, 71(VIR95 93-101), 23, 30, 19951200, 0386-4227, http://jglobal.jst.go.jp/public/200902150186012457
  • On Vector Quantization with Weighted Distortion Measure in Subband Image Coding., 福永哲也, 山田芳郎, 都築伸二, 田崎三郎, 電子情報通信学会技術研究報告, 95, 347(IT95 39-44), 19, 22, 19951106, 0913-5685, http://jglobal.jst.go.jp/public/200902194607540404
  • A Consideration On Two-step Nearest Neighbor Search Algorithm, YAMADA Yoshio, ISHIDA Mitsunobu, TSUZUKI Shinji, TAZAKI Saburo, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, 95, 347, 13, 18, 19951106, http://ci.nii.ac.jp/naid/110003197208, This paper presents the basic theory of the two-step nearest neighbor search algorithm. At the first stage of the proposed algorithm, the prequantizer is used for locating or spotlighting the range of possible codewords to be the nearest neighbor one. These spotlit codewords are referred to as the candidate codewords. Once the candidate codewords are located, the embeded nearest neighbor search quantizer examines all the candidates to find the nearest neighbor codeword at the second stage. The theorem given and proved in this paper guarantees that the nearest neighbor codeword is just within the candidate codewords.
  • On Vector Quantization with Weighted Distortion Measure in Subband Image Coding, FUKUNAGA Tetsuya, YAMADA Yoshio, TSUZUKIt Shinji, TAZAKI Saburo, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, 95, 347, 19, 22, 19951106, http://ci.nii.ac.jp/naid/110003197209, In subband coding, the input signal is decomposed into 16 subbands through analysis filter bank which forms a parallel set of analysis filters. Each subbanded signal is then downsampled, and a vector which consists of 16 subband elements is quantized by the vector quantizer with the weighted distortion measure which is weighted by each power of the impluse response of synthesis filter bank. We show that the mount of quantization noise of the reconstructed image on each subband is different. Such that the noise power of the lower subband is generally larger than that of higher subband. By simulation, we show that the weighted scheme proposed provides approximately 1[dB] improvement over the non-weighted scheme within range 1/2[bits/pixel] to 3/4[bits/pixel].
  • A traffic Analysis of a Spread Unslotted Aloha system with the Trunk Reservation method., 都築伸二, 中山勇一, 山田芳郎, 田崎三郎, 電子情報通信学会技術研究報告, 95, 247(SST95 46-59), 1, 6, 19950921, 0913-5685, http://jglobal.jst.go.jp/public/200902180068799295
  • A traffic Analysis of a Spread Unslotted Aloha system with the Trunk Reservation method, Tsuzuki Shinji, Nakayama Yuichi, Yamada Yoshio, Tazaki Saburo, Technical report of IEICE. SST, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SST, スペクトル拡散, 95, 247, 1, 6, 19950921, 09135685, http://ci.nii.ac.jp/naid/110003289466, In this paper, the traffic properties in a spread unslotted ALOHA system with a fixed packet length embedded with the trunk reservation method is analyzed for multimedia communications in a CDMA distributed local area network environment. The analyzed system model employs a protocol with a monitoring function of the number of simultaneous users and two level transmission priorities. We extend the analysis method for a spread unslotted ALOHA system with a fixed packet length proposed by Yamazato et al. [SST94-98] in the model existing two different priorities' users. The analyzed results shows that we can control the throughput and delay performance by setting the proper threshold values of simultaneous users according to their respective priorities.
  • Periodic correlation properties of FM coded M sequences having DC free spectrum, Shinji Tsuzuki, Shunsaku Oskai, Saburo Tazaki, Yoshio Yamada, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, E78-A, 1127, 1135, 19950901, 09168508, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0029369372&origin=inward, The periodic correlation properties of M sequences coded by channel codes are discussed. As for the channel codes, the Manchester code and the eight DC free codes in the FM family codes, which include the conventional FM code and the differential Manchester code, are adopted. The M sequences coded by the DC free codes in the FM family codes are referred to as FM coded M sequences. The periodic correlation properties of all combinations of the FM coded M sequences are checked, and the combinations which can provide almost the same or better properties as compared with those of the preferred pairs of M sequences are described. An example of code design using the FM coded M sequences for asynchronous direct sequence/spread spectrum multiple access systems is also discussed.
  • Throughput analysis of slotted non-persistent and one-persistent CSSS/OD (carrier sense spread spectrum with overload detection) protocols, Francis N. Mumba, Shinji Tsuzuki, Yoshio Yamada, Saburo Tazaki, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, E78-A, 1220, 1224, 19950901, 09168508, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0029370287&origin=inward, The throughput performance of the non-persistent carrier sense spread spectrum with overload detection (NP-CSSS/OD) protocol is analysed and compared with that of the conventional non-persistent and one-persistent carrier sense multiple access with collision detection (NP-CSMA/CD and 1P-CSMA/CD) and the one-persistent carrier sense spread spectrum with overload detection (1P-CSSS/OD) protocols. We also introduced utilization measurements and did some performance comparisons between these protocols. At high offered loads, the NP-CSSS/OD protocol is found to offer the best throughput and utilization performances amongst them.
  • A Study for Spectral Control Code, TAZAKI Saburo, MATSUDA Hidekazu, TSUZUKI Shinji, YAMADA Yoshio, テレビジョン学会年次大会講演予稿集, 一般社団法人映像情報メディア学会, テレビジョン学会年次大会講演予稿集, 31, 27, 28, 19950726, 09191879, http://ci.nii.ac.jp/naid/110004774302, The codes called"spectral control codes"are very attractive for the designers on both transmission and recording systems. This paper discusses the fundamental properties with which they have to be satisfied. Some typical examples are shown in the figure of power spectral density.
  • A Consideration on the Application of Trellis Coded Modulation to the Magnetic Recording, TAZAKI Saburo, YANAGIHARA Kenji, TSUZUKI Shinji, YAMADA Yoshio, テレビジョン学会年次大会講演予稿集, 一般社団法人映像情報メディア学会, テレビジョン学会年次大会講演予稿集, 31, 29, 30, 19950726, 09191879, http://ci.nii.ac.jp/naid/110004774303, Recentrly, the applications of TCM to Magnetic Recording have been discussed vigorously. Here we examine the TCM-8PSK system using a differential Lorentzian property as a magnetic channel model. A synchronous detector and a Viterbi decoder are used. The simulation result shows the validity of this system for high density recording.
  • A Study for Spectral Control Code., 田崎三郎, 松田秀和, 都築伸二, 山田芳郎, テレビジョン学会年次大会講演予稿集, 1995, 27, 28, 19950700, http://jglobal.jst.go.jp/public/200902117325537465
  • A Consideration on the Application of Trellis Coded Modulation to the Magnetic Recording., 田崎三郎, 柳原謙志, 都築伸二, 山田芳郎, テレビジョン学会年次大会講演予稿集, 1995, 29, 30, 19950700, http://jglobal.jst.go.jp/public/200902185650205989
  • 49, 5, 19950520, 03866831, http://ci.nii.ac.jp/naid/110003705208
  • Properties of Two-Demensional Codes and an Example Code., 田崎三郎, 浜本和信, 都築伸二, 山田芳郎, 電子情報通信学会技術研究報告, 95, 49(MR95 1-5), 31, 37, 19950519, 0913-5685, http://jglobal.jst.go.jp/public/200902164454494606
  • Properties of Two-Demensional Codes and an Example Code, Tazaki Saburo, Hamamoto Kazutoshi, Tsuzuki Sinji, Yamada Yoshio, IEICE technical report. Magnetic recording, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. MR, 磁気記録, 95, 49, 31, 37, 19950519, http://ci.nii.ac.jp/naid/110003186183, The two-dimensional code has lately attracted considerable attention as a novel technology to not only magnetic recording systems, but also optical recoding systems for improving drastically areal density. This paper investigates the improved properties of this code such as k-constraint and minimum Hamming distance. We propose (d_x=1, k_x=4, k_y=2 ; m=2, n=5 ; L=2) code by additionally using trellis method.
  • Periodic Correlation Properties of Channel Coded M Sequences having DC free spectrum, TSUZUKI S., OSAKI S., TAZAKI S., YAMADA Y., Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 1995, 19950327, http://ci.nii.ac.jp/naid/110003247720, 直接拡散によるスペクトル拡散通信において、PN系列を伝送符号化すれば伝送路の伝達関数に対してスペクトルマッチングを行うことができるため,電力損失を軽減できる.このときの受信側での復合法として,伝送符号を復合したのち逆拡散処理を行う方法と,伝送符号化したPN系列のまま逆拡散処理を行う方法とが考えられる.伝送符号化としてもなお,PN系列が良好な相関特性を維持できるのであれば,後者の方がより高い拡散比のまま逆拡散処理を行なえるため,ビット誤り率の点で有利であると考えられる。筆者らは以前,FMファミリー符号のなかでDCフリー特性を有するFM5,FMV6(いわゆるFM符号),FMV9,FMV10,IFMV5,IFMV6(差動マンチェスタ符号),IFMV9及びIFMBV10符号にて符号化したM系列(以下,FM符号化M系列と呼ぶ)のなかに,偶相互相関が0となる系列の組み合せがあることについて報告した.さらに一部の組合せについては,偶及び奇相互相関の分散および最悪値について報告した.本稿では,に示した結果を踏まえ,FM符号化系列を用いた多元接続システムでの最大接続局数を考察する。
  • Rosary type search method for marging state on Viterbi detection, Yoshino S., Tazaki S., Tsuzuki S., Yamada Y., Proceedings of the IEICE General Conference, 一般社団法人電子情報通信学会, 電子情報通信学会総合大会講演論文集, 1995, 2, 19950327, http://ci.nii.ac.jp/naid/110003262379, 最近、高密度ディジタル記録においてビタビ検出技術は、PR(Partial Responce)技術と結びついて重要な役割を果たしている。このビタビ検出での問題点は、ACS操作の複雑さと、トレリス線図上の生き残りバスを遡りマージ状態を探索するために多くの処理時間が費やされることである。本稿では、バス形状マトリクスを使用した代数的探索法のバス形状マトリックスをロザリオ型に変更することで、より単純で高速化が可能な探索法を得たので提案する。
  • Periodic Correlation Properties of Channel Coded M Sequences having DC free spectrum., 都築伸二, 尾崎俊作, 田崎三郎, 山田芳郎, 電子情報通信学会大会講演論文集, 1995, Sogo Pt 1, 231, 19950300, 1349-1369, http://jglobal.jst.go.jp/public/200902113206930692
  • Periodic Correlation Properties between FM-Coded M Sequences of Different Periods., 都築伸二, 尾崎俊作, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1995, 207, 19950000, http://jglobal.jst.go.jp/public/200902107338035196
  • A Consideration on MO Recording using 13B9T code., 田崎三郎, 毛利浩喜, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1995, 235, 19950000, http://jglobal.jst.go.jp/public/200902110339197980
  • Auto correlation properties of channel coded M sequences., 都築伸二, 武井周作, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1995, 206, 19950000, http://jglobal.jst.go.jp/public/200902114219645691
  • A Note on Nearest Neighbor Search using Anchor Points., 山田芳郎, 石田光伸, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1995, 232, 19950000, http://jglobal.jst.go.jp/public/200902114688393148
  • Lycos and Yahoo in Internet information retrieval., 山田芳郎, 八十岡佳宏, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1995, 354, 19950000, http://jglobal.jst.go.jp/public/200902119756654925
  • An Effect of Trellis Encoding as TCPR., 田崎三郎, 柳原謙志, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1995, 234, 19950000, http://jglobal.jst.go.jp/public/200902129453566344
  • A Study of Spread Unslotted Aloha Systems with Trunk Reservation method., 都築伸二, 中山勇一, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1995, 213, 19950000, http://jglobal.jst.go.jp/public/200902139672338352
  • Performance Evaluation among (1,7), (2,7) and 3B2T Codes Based on Recording Density., 芳野重俊, 田崎三郎, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1995, 233, 19950000, http://jglobal.jst.go.jp/public/200902145505443861
  • BER performance improvement on IFM-V9 coded OL-PN DS/SS systems by using orthogonal sequence., 都築伸二, 内海淳一, 水本和樹, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1995, 204, 19950000, http://jglobal.jst.go.jp/public/200902146194458939
  • Development of DS/SS transmitter for power line data transmission., 都築伸二, 沖田亨, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1995, 205, 19950000, http://jglobal.jst.go.jp/public/200902160509927382
  • Information media server which search automatically on Internet., 山田芳郎, 石田健司, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1995, 353, 19950000, http://jglobal.jst.go.jp/public/200902169205972362
  • A method of sound data compression and expansion on Ethernet. Measurement of average delay., 都築伸二, HASRITO E, 山田芳郎, 田崎三郎, 電気関係学会四国支部連合大会講演論文集, 1995, 214, 19950000, http://jglobal.jst.go.jp/public/200902177666897799
  • Make telnet client with built in S/KEY authentication., 山田芳郎, 林秀郎, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1995, 345, 19950000, http://jglobal.jst.go.jp/public/200902184226055024
  • 1126, 1130, 19950000
  • XIV, 69, 78, 19950000
  • A reliable signal detection method for the combination of PRML method and ternary recording code, S. Tazaki, T. Takashima, S. Tsuzuki, Y. Yamada, IEEE International Symposium on Information Theory - Proceedings, 214, 19941201, 21578095, 10.1109/ISIT.1994.394754, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84894327215&origin=inward, We focus our attention on a method for finding the merging state after the ACS (add compare select) operation in a Viterbi algorithm combined with the PR method and the ternary recording system. Firstly, the path shape matrix method is introduced with algebraic lucidity. Secondly, we propose a "rosary" style method that is far much simpler than the path shape matrix method. © 1994 IEEE.
  • Reliable signal detection method for the combination of PRML method and ternary recording code, S. Tazaki, T. Takashima, S. Tsuzuki, Y. Yamada, IEEE International Symposium on Information Theory - Proceedings, 19941201, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0028713976&origin=inward, We focus our attention on a method for finding the merging state after the ACS (add compare select) operation in a Viterbi algorithm combined with the PR method and the ternary recording system. Firstly, the path shape matrix method is introduced with algebraic lucidity. Secondly, we propose a 'rosary' style method that is far much simpler than the path shape matrix method.
  • Survey of BER improvement on FM family code, S. Tazaki, T. Koyama, M. Pinandito, Y. Yamada, S. Tsuzuki, National Conference Publication - Institution of Engineers, Australia, 2, 971, 975, 19941201, 03136922, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0028746105&origin=inward, Veillard suggests that a higher code rate for the selection of a recording code in order to attain the demand of higher storage density is not a necessary condition to fulfill as far as the FM code is concerned. This paper investigates firstly the common features of FM family codes which can be expected to attain the demand of higher storage density in spite of their low code rates. We find that four codes with the FM code (FM-V6) included, hold true on that demand and examined their bit error rate performance. The results show that FM-V14 code has the best SNR performance among them.
  • Error correction using IFMV9 coded overlapped PN sequence for power line SSMA, Shinji Tsuzuki, Kazuki Mizumoto, Saburo Tazaki, Yoshio Yamada, IEEE International Symposium on Spread Spectrum Techniques & Applications, 1, 258, 262, 19941201, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0028753227&origin=inward, We propose an IFMV9 coded OL(overlapped)-PN sequence as a PN sequence that is suitable for DS/SS data transmission with low spreading factor through a power line channel. The IFMV9 coded OL-PN sequence is a data stream coded according to the coding rule of IFMV9, that is one of the channel codes, in every unit period length of a PN sequence. It can provide DC free and correlation properties. This coded sequence also makes it possible to combine maximum-likelihood (ML) decoding techniques with the well-known differential decoding method at the receiver's side. We investigate the error rate characteristics and the possible maximum number of simultaneous users by computer simulation. We use a model of television of which a power circuit impedance alternates rapidly and greatly, as the simulated channel. The simulated result shows the error rate improvement due to the combination of ML decoding and differential decoding at the receiving end.
  • Estimation precision of appearance of parallel motion in moving picture sequence with rotation, expansion and contraction., 水木啓勝, 山田芳郎, 山本昇志, 都築伸二, 田崎三郎, 電子情報通信学会技術研究報告, 94, 325(IE94 88-95), 25, 29, 19941108, 0913-5685, http://jglobal.jst.go.jp/public/200902146975186420
  • Mathematical morphology which decomposes image and filter by gray scale value in advance, Mizuki Hiromasa, Yamada Yoshio, Yamamoto Shoshi, Tsuzuki Shinji, Tazaki Saburo, IEICE technical report. Image engineering, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IE, 画像工学, 94, 325, 25, 29, 19941108, http://ci.nii.ac.jp/naid/110003195198, Motion estimation is one of the important technology for signal processing in moving picture coding."Appearance of parallel motion " which is inspected by block matching method contains information of rotation,expansion and contraction as well.Authors propose an estimation method basing on Helmert's transformation with using the "appearance of parallel motion".This paper explains both logical and experimental review of estimation precision for the "appearance of parallel motion".
  • Estimation precision of appearance of parallel motion in moving picture sequence with rotation, expansion and contraction, Mizuki Hiromasa, Yamada Yosio, Yamamoto Shoshi, Tsuzuki Shinji, Tazaki Saburo, ITEJ Technical Report, 一般社団法人映像情報メディア学会, テレビジョン学会技術報告, 18, 64, 25, 29, 19941108, 03864227, http://ci.nii.ac.jp/naid/110003679339, Motion estimation is one of the important technology for signal processing in moving picture coding. "Appearance of parallel motion" which is inspected by block matching method contains information of rotation, expansion and contraction as well. Authors propose an estimation method basing on Helmert's transformation with using the "appearance of parallel motion". This paper explains both logical and experimental review of estimation precision for the "appearance of parallel motion".
  • A Study of Band Allocation Method for CDMA Distributed Network., 都築伸二, 長岡輝男, 田崎三郎, 山田芳郎, 電子情報通信学会技術研究報告, 94, 206(SST94 33-46), 57, 62, 19940826, 0913-5685, http://jglobal.jst.go.jp/public/200902129182361717
  • A Study of Band Allocation Method for CDMA Distributed Network, Tsuzuki Shinji, Nagaoka Teruo, Tazaki Saburo, Yamada Yoshio, Technical report of IEICE. SST, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. SST, スペクトル拡散, 94, 206, 57, 62, 19940826, 09135685, http://ci.nii.ac.jp/naid/110003289571, In this paper,for multimedia communication in a CDMA based distributed local area network environment,a protocol with a monitoring function of the simultaneous user number and two level transmission priorities is proposed.The protocol,referred to as CDMA, PS,assigns a prior bandwidth to stations sending the isochronous information.The monitoring function suppresses the lower priority station′s transmission under congestion situations. Its computer simulated performance is also presented here.The simulated results show that lower priority stations can send packets as much as they can while keeping the prior bandwidth during the congestion situations.The obtained effective total throughput,which excludes the protocol overhead,is 0.56.
  • A study of fast adaptive equalization algorithms for power line transmission channel., 都築伸二, 内海淳一, 田崎三郎, 山田芳郎, 電子情報通信学会技術研究報告, 94, 35(IT94 9-21), 55, 60, 19940517, 0913-5685, http://jglobal.jst.go.jp/public/200902153661687439
  • A study of fast adaptive equalization algorithms for power line transmission channel, Tsuzuki Shinji, Utsumi Junichi, Tazaki Saburo, Yamada Yoshio, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, 94, 35, 55, 60, 19940517, http://ci.nii.ac.jp/naid/110003197435, In this paper,the introduction of adaptive equalizer is discussed as a way of signal processing on the receiver side of power line spread spectrum(SS)communication systems.The adaptive equalizer reconstructs approximately signal waveforms on the transmitter side by estimating a reverse transfer function.As adaptive algorithms,we adopt Least Mean Square(LMS)algorithm and Recursive Least Square(RLS)algorithm,and we carry out the comparison about performauce between them.The computer simulation shows that RLS algorithm is performed better than LMS algorithm in a convergence property,but at the same time is needed much more numbers of calculation than LMS algorithm.
  • A Performance Evaluation of Two-step Nearest Neighbor Search Algorithm with Coarse Prequantization for VQ., 山田芳郎, 坂下聡, 田崎三郎, 都築伸二, 電子情報通信学会技術研究報告, 94, 34(IT94 1-8), 23, 28, 19940516, 0913-5685, http://jglobal.jst.go.jp/public/200902118409087550
  • A performance evaluation of Two-step nearest neighbor search algorithm with coarse preguantization, Yamada Yoshio, Sakashita Satoru, Tazaki Saburo, Tsuzuki Shinji, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, 94, 34, 23, 28, 19940516, http://ci.nii.ac.jp/naid/110003197422, We propose a new coding algorithm of VQ in order to improve a search complexity and name it a two-step nearest neighbor search algorithm.Our fundamental premise is not to make degradation of quantizing quality compared with FSVQ.The method that a coarse prequantizer is applied to a partial space of the information source has been already reported.Here,we try to expand it into a whole space of the information source.By optimizating the partition range of the information source,we verify the effectiveness of our method.As a result,it is found that our method can be reduce a search complexity compared with TSVQ,but is oblised to increase a storage complexity.
  • Evaluation of Parameters Related to Japanese Vowel Recognition By HMM, Tazaki Saburo, Sushil Kumar, Nagashima Teruo, Tsuzuki Shinji, Yamada Yoshio, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, 94, 34, 41, 46, 19940516, http://ci.nii.ac.jp/naid/110003197425, Parameterization of the speech signal is the important step in the speech recognition process.Several popular signal analysis algorithms have emerged,which are intended to produce a parametric representation of the speech signal:parameters that capture spectral dynamics or changes of the spectrum with time.Current approaches to speech recognition are primarily concerned with modeling the vocal tract characteristics and for relevant reason cepstral parameters derived either from Fourier transform or linear prediction techniques enjoy widespread use in speeh recognition field.Alike cepstral parameters,formant frequencies can also be considered as meaningful parameters for recognition purpose.To investigate its capability some recognition tests have been performed with the formant paraineters,the cepstral parameters,and concatenated cepstral & formant parameters in different experimental conditions.Evaluation of these parameters in the case of HMM based Japanese vowel sound recognition is the main purpose of this paper.
  • A Proposal on Two Dimensional Recording Codes having Error Correcting Property., 田崎三郎, 沖本典子, 都築伸二, 電子情報通信学会大会講演論文集, 1994, Shunki Pt 5, 5.100, 19940300, 1349-1369, http://jglobal.jst.go.jp/public/200902111255617255
  • Generation of Pseudo-"Sequences Produced by Inversion of Alternate Values in PN Sequence" using FM family Codes., 都築伸二, 尾崎俊作, 田崎三郎, 電子情報通信学会大会講演論文集, 1994, Shunki Pt 1, 1.265, 19940300, 1349-1369, http://jglobal.jst.go.jp/public/200902166481722192
  • A Method for Performance Improvement of FM Family Codes., 田崎三郎, PINANDITO M, 都築伸二, 電子情報通信学会大会講演論文集, 1994, Shunki Pt 5, 5.92, 19940300, 1349-1369, http://jglobal.jst.go.jp/public/200902172043176924
  • Performance comparisons of recording codes based on sampled servo format, S. Tazaki, M. Noguchi, S. Yoshino, S. Tsuzuki, Y. Yamada, Conference Record - International Conference on Communications, 3, 1809, 1813, 19940101, 05361486, http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0028018705&origin=inward, We discuss the performance of recording codes with several signal processing methods at the reading process for a system based on a sampled servo format. Bit error rates for differential detection and PRML methods with the 4/15 and 4/11 codes are investigated, respectively. The performance of these codes are compared with the (2,7) and (1,7)RLL codes which are designed for a continuous servo format. The simulations indicate that the 4/11 code with PRML method can compete favorably with the (1,7)RLL code with PRML method at a data frequency of 12Mbps.
  • Periodic Correlation Distribution of FM coded M sequence., 都築伸二, 尾崎俊作, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1994, 225, 19940000, http://jglobal.jst.go.jp/public/200902116949663175
  • 光磁気記録における(1,7)および(2,7)符号の記録パルスのデューティー比の影響について, 芳野重俊, 田崎三郎, 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1994, 155, 19940000, http://jglobal.jst.go.jp/public/200902118948579025
  • A method of sound data compression and expansion based on interframe correlation., 都築伸二, 大西宏明, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1994, 212, 19940000, http://jglobal.jst.go.jp/public/200902129058441109
  • A study of adaptive equalizer for power line transmission channel., 都築伸二, 内海淳一, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1994, 224, 19940000, http://jglobal.jst.go.jp/public/200902133275383610
  • A Improvement of Two-step Nearest Neighbor Search Algorithm using Coarse Scalar Prequantizer., 山田芳郎, 坂下聡, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1994, 235, 19940000, http://jglobal.jst.go.jp/public/200902148749672152
  • Recursive Vector Quantization using bi-linear patch., 山田芳郎, 宮脇光一郎, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1994, 233, 19940000, http://jglobal.jst.go.jp/public/200902151860462311
  • Implemention of a repeater between an Ethernet and a VSAT Satellite Line., 都築伸二, ハスリト エコ, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1994, 209, 19940000, http://jglobal.jst.go.jp/public/200902154647237346
  • A Consideration of zoomout Bi-level picture., 山田芳郎, 石田健司, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1994, 236, 19940000, http://jglobal.jst.go.jp/public/200902160340496891
  • A Consideration of Effect of Jitter to Bit Error Rate., 田崎三郎, 小山俊之, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1994, 237, 19940000, http://jglobal.jst.go.jp/public/200902160496799924
  • Performance Evaluation for RLL Codes+Write Equalization., 田崎三郎, 笹近秀樹, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1994, 238, 19940000, http://jglobal.jst.go.jp/public/200902166541939749
  • Improvement of Multiple Access property using Orthogonal Sequence., 都築伸二, 水本和樹, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1994, 226, 19940000, http://jglobal.jst.go.jp/public/200902173327391929
  • Performance comparison between PC-NFS and NetWare for UNIX., 都築伸二, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1994, 211, 19940000, http://jglobal.jst.go.jp/public/200902182396081833
  • A Consideration of Motion Prediction using Expanded Block Matching Method., 山田芳郎, 山本昇志, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1994, 234, 19940000, http://jglobal.jst.go.jp/public/200902190868973310
  • A-263, 1, 265, 19940000
  • A-263, 1, 265, 19940000
  • 13, 31, 40, 19940000
  • Detection of Rotation and Scaling Parameters based on Simple Block Matching., 山田芳郎, 山本昇志, 田崎三郎, 都築伸二, 電子情報通信学会技術研究報告, 93, 384(SST93 58-71), 49, 54, 19931215, 0913-5685, http://jglobal.jst.go.jp/public/200902102535903173
  • Two-step Nearest Neighbor Search Algorithm with Coarse Prequantization., 山田芳郎, 坂下聡, 田崎三郎, 都築伸二, 電子情報通信学会技術研究報告, 93, 384(SST93 58-71), 43, 48, 19931215, 0913-5685, http://jglobal.jst.go.jp/public/200902160779896004
  • Two-step Nearest Neighbor Search Algorithm with Coarse Prequanization, Yamada Yoshio, Sakashita Satoru, Tazaki Saburo, Tsuzuki Shinji, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, 93, 380, 43, 48, 19931215, http://ci.nii.ac.jp/naid/110003197355, A coding process of optimal VQ is a nearest neighbor search itself on a multidimensional space.In this paper,we propose a two- step nearest neighbor search algorithm faster than the so far proposed full search algorithms without a loss of performance.Our algorithm first reduces the number of possible candidate vectors using coarse prequantization and EPDS-11 we named.Then it can realize a fast search using the resultant candidate vectors more effectively.When the conditions are given 4£dimension!,8£partitio ns, dimension!and the rate is less than 10£bits/vector!,the simula tion result shows that our proposed method is faster than the tree search algorithm for the memoryless Gaussian source.
  • Detection of Rotation and Scaling Parameters based on Simple Block Matching, Yamada Yoshio, Yamamoto Syoshi, Saburo Tazaki, Tsuzuki Shinji, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, 93, 380, 49, 54, 19931215, http://ci.nii.ac.jp/naid/110003197356, As an important technique for performing more efficient motion displacement estimation in moving images,several motion compensation methods have already been developed.Block matching method is well known on of them,but basically looks upon as a technique for searching only parallel displacement.Alternatively, affine matching method is also one of them,and can perform not only searching parallel displacement bat also extracting rotation and scaling in the interframe.However,this method fairly needs the processing time of more ten times than block matching method.In this paper,we succeed to verify the effectiveness of the block matching method for detecting rotation and scaling within a few degrees instead of affine matching method.
  • FM coded PN sequences with DC free property and their application to power line SS. [1]., 都築伸二, 水本和樹, 田崎三郎, 山田芳郎, 電子情報通信学会技術研究報告, 93, 64(IT93 9-16), 41, 46, 19930525, 0913-5685, http://jglobal.jst.go.jp/public/200902182297175516
  • FM coded PN sequences with DC free property and their application to power line SS£1!, Tsuzuki Shinji, Mizumoto Kazuki, Tazaki Saburo, Yamada Yoshio, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, IT93, 16, 41, 46, 19930525, http://ci.nii.ac.jp/naid/110003197336, In this paper,FM coded M sequence with DC free property is discussed as the applicable PN sequence to power line Spread Spectrum(SS)communication system.Our method is motivated by the conventional differential decoding system for power fine SS,the system which sends PE coded PN sequence with its reference sequence.We extend it and add an error correcting ablability to a coded PN sequence.As an application,we code M sequence symbol by symbol following FMV6 coding rule.As another application,we do it sequence by sequence following FMV9 coding rule and apply Viterbi decoding.The result of computer simulation shows the improvement of about 3.5 dB on SNR at bit error rate 10_-4> by using our symbol by symbol coding method compared with the conventional method.In the case of sequence by sequence coding,it shows the improvement of about 9 dB on SNR compared with the conventional method.
  • A Color Image Clustering Method for Minimizing Maximum Distortion., 山田芳郎, 沢田吾一, 田崎三郎, 都築伸二, 電子情報通信学会技術研究報告, 93, 63(IT93 1-8), 1, 5, 19930524, 0913-5685, http://jglobal.jst.go.jp/public/200902184004807192
  • A Color Image Clustering Method for Minimizing Maximum Distortion, Yamada Yoshio, Sawada Goichi, Tazaki Saburo, Tsuzuki Shinji, IEICE technical report. Information theory, 一般社団法人電子情報通信学会, 電子情報通信学会技術研究報告. IT, 情報理論, 93, 63, 1, 5, 19930524, http://ci.nii.ac.jp/naid/110003197321, The clustering method is widely used and in image processing field it is also one of the important fundermental technique.The clustering technique which minimize the mean value of error with a given error criterion is usually used.Especially MSE minirrjizing clustering is often used because of mathematical expression′s easi ness.However when this MSE minimizing technique is applied to clustering in color-space,it sometimes happens to make a color of which occurrence probability is low belong to quite different color cluster.This reason is that the color-space in which the low occurrence probability color belongs is clustered roughly while the color-space in which the high occurrence probability color belongs is clustered finely.In this paper,we discuss the ablability of the clustering which minimize maximum distortion calculated from l_∞ norm and compare it with the conventional MSE clustering.
  • An Extended Partial Distortion Search Algorithm for Fast Vector Quantization., 山田芳郎, 曽根進吾, 坂下聡, 田崎三郎, 都築伸二, 電子情報通信学会大会講演論文集, 1993, Shunki Pt 7, 7.92, 19930300, 1349-1369, http://jglobal.jst.go.jp/public/200902137879023740
  • 47, 2, 19930220, 03866831, http://ci.nii.ac.jp/naid/110003704173
  • Kuバンド衛星通信VSAT実験システム 衛星共同研究会JCS愛媛可搬実験地球1の概要, 曽根直人, 大山賢志, 森井昌克, 都築伸二, 山田芳郎, 田崎三郎, 電気関係学会四国支部連合大会講演論文集, 1993, 218, 19930000, http://jglobal.jst.go.jp/public/200902102517366780
  • A Proposal of Isochronous Transmission Protocol using CDMA/PS System., 都築伸二, 長岡輝男, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1993, 211, 19930000, http://jglobal.jst.go.jp/public/200902111606891731
  • A Study for High Bit Rate VQ Design., 山田芳郎, 八十岡佳宏, 松野修三, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1993, 243, 19930000, http://jglobal.jst.go.jp/public/200902121100975800
  • VSAT愛媛実験局の伝送特性に関する一実験, 大山賢志, 森井昌克, 都築伸二, 山田芳郎, 田崎三郎, 電気関係学会四国支部連合大会講演論文集, 1993, 219, 19930000, http://jglobal.jst.go.jp/public/200902123682568310
  • A Study of Voice Data discarding Method by Silent Period Detection., 都築伸二, 大西宏明, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1993, 209, 19930000, http://jglobal.jst.go.jp/public/200902124537184364
  • A Proof for the Optimality of the Fast VQ Algorithm using Scalar Prequantization., 山田芳郎, 坂下聡, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1993, 242, 19930000, http://jglobal.jst.go.jp/public/200902131028421132
  • On Inverse FM Family Codes., 田崎三郎, PINANDITO M, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1993, 240, 19930000, http://jglobal.jst.go.jp/public/200902134988028418
  • A Method based upon LPC Cepstrum and Principal Component Analysis to distinguish Nasal Consonant Group from Other Groups., 田崎三郎, 永島輝男, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1993, 241, 19930000, http://jglobal.jst.go.jp/public/200902144879277888
  • Error Rate Characteristics considering Continuous Noise on Digital Magnetic Recording., 田崎三郎, 小山俊之, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1993, 238, 19930000, http://jglobal.jst.go.jp/public/200902160889741170
  • Detection of Rotation and Scaling Parameters based upon Block Matching Method., 山田芳郎, 山本昇志, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1993, 252, 19930000, http://jglobal.jst.go.jp/public/200902175617279858
  • Evaluation of PRML Method on Sample-Servo System., 田崎三郎, 野口幹史, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1993, 258, 19930000, http://jglobal.jst.go.jp/public/200902179410355584
  • A study of Multiple Access property of FMV9 coded OL-PN sequence., 都築伸二, 水本和樹, 田崎三郎, 山田芳郎, 電気関係学会四国支部連合大会講演論文集, 1993, 210, 19930000, http://jglobal.jst.go.jp/public/200902191067557788
  • Performance Evaluation on the Combination of Write Equalizers by Schneider and PRML Methods., 田崎三郎, 笹近秀樹, 山田芳郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1993, 239, 19930000, http://jglobal.jst.go.jp/public/200902194141900723
  • SNR Characteristics for RVQ using Random Quantizer., 山田芳郎, 宮脇光一郎, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1993, 244, 19930000, http://jglobal.jst.go.jp/public/200902198023922467
  • A Clustering Method for Minimizing Maximum Distortion in Uniform Color Space., 山田芳郎, 沢田吾一, 田崎三郎, 都築伸二, 電気関係学会四国支部連合大会講演論文集, 1993, 253, 19930000, http://jglobal.jst.go.jp/public/200902199253692246
  • W23, 4, 125, 128, 19930000
  • SSE92, 196, 79, 84, 19930000
  • W23, 4, 125, 128, 19930000
  • IT93, 16, 41, 46, 19930000
  • SSE92, 196, 79, 84, 19930000
  • Error Characteristics of FM Family Codes Using PRML., 田崎三郎, PINANDITO M, 山田芳郎, 都築伸二, 電子情報通信学会技術研究報告, 92, 305(MR92 52-59), 13, 17, 19921112, 0913-5685, http://jglobal.jst.go.jp/public/200902019307172431
  • PRML Method on 4/15 code and 4/11 code., 田崎三郎, 野口幹史, 山田芳郎, 都築伸二, 電子情報通信学会技術研究報告, 92, 305(MR92 52-59), 1, 6, 19921112, 0913-5685, http://jglobal.jst.go.jp/public/200902038944228836
  • Bit error rate characteristics of 3B-2T code and 4B-3T code., 田崎三郎, 高島隆雄, 山田芳郎, 都築伸二, 電子情報通信学会技術研究報告, 92, 305(MR92 52-59), 7, 12, 19921112, 0913-5685, http://jglobal.jst.go.jp/public/200902090253372070
  • PRML Method on 4/15 Code and 4/11 Code, TAZAKI Saburo, NOGUCHI Masahito, YAMADA Yoshio, TSUZUKI Shinji, ITEJ Technical Report, 一般社団法人映像情報メディア学会, テレビジョン学会技術報告, 16, 72, 1, 6, 19921112, 03864227, http://ci.nii.ac.jp/naid/110003685496, A 4/15 code and a 4/11 code have been developed in the magneto-optical disc system with sample servo mechanism. We propose the application of PR systems, instead of differentail detection method. We also adopt Viterbi detection method with PR systems as PRML methods. Furthermore, another signal detection method making use of the unique property of the coding rule on 4/15 is proposed in this paper. Bit error rates of our systems are examined by computer simulation and compared with the conventional differential detection. The results show that our proposed systems exhibits excellent performance compared with the conventional one.
  • Bit error rate characteristics Of 3B-2T code and 4B-3T Code, TAZAKI Saburou, TAKASHIMA Takao, YAMADA Yoshio, TSUZUKI Shinji, ITEJ Technical Report, 一般社団法人映像情報メディア学会, テレビジョン学会技術報告, 16, 72, 7, 12, 19921112, 03864227, http://ci.nii.ac.jp/naid/110003685497, In this paper, we have tried to applied several PRML(Partial Response Maximum Likelihood) methods to a 3B-2T code and a 4B-3T code, those of conventional ternary recording codes, and evaluated the performance of bit error-rate for necessary SNR at the reading point by using both techniques on state transition matrix and symbol transition matrix. The results show that PR(1,0,-1)ML method can be made the best performance among several combination of PRML method with a 3B-2T code and a 4B-3T code.
  • Error Characteristics Of FM Family Codes Using PRML, TAZAKI Saburo, PINANDITO Mego, YAMADA Yoshio, TSUZUKI Shinji, ITEJ Technical Report, 一般社団法人映像情報メディア学会, テレビジョン学会技術報告, 16, 72, 13, 17, 19921112, 03864227, http://ci.nii.ac.jp/naid/110003685498, In this paper, we make clear the properties of thirty FM Family codes through the analysis on coding rules. Then the combination of these codes with several PRML methods is investigated with bit error rate by computer simulation. The results show that nine FM Family codes can be performed better SN ratio than conventional FM code at error rate 10^<-4>.
  • Motion estimation of Color moving images using an affine matching, YAMADA Yoshio, MIYAWAKI Hiroyuki, TAZAKI Saburo, TSUZUKI Shinji, ITEJ Technical Report, 一般社団法人映像情報メディア学会, テレビジョン学会技術報告, 16, 70, 37, 40, 19921026, 03864227, http://ci.nii.ac.jp/naid/110003685487, The method of motion displacement estimation of moving images which includes rotation and scaling between frames was developed by C.F.Fuh et al[1]. In this method, shape deformations modeled by affine matching were considered for image matching. But, this algorithm required much more computational time when compared to the conventional block matching algorithm[2] which considered only shifting. In this paper, we show a way of reducing the number of calculations, and we succeeded to reduce the computational time to 7 times that of the conventional block matching algorithm. We also applied our method to color moving images, and an example using Munsell color space is shown.
  • Motion estimation of color moving images using an affine matching., 山田芳郎, 宮脇啓之, 田崎三郎, 都築伸二, テレビジョン学会技術報告, 16, 70(VAI92 28-34/IPCV92 22-28), 37, 40, 19921000, 0386-4227, http://jglobal.jst.go.jp/public/200902060507676280
  • A Method for Designing RVQ with Companding Models., 曽根進吾, 山田芳郎, 田崎三郎, 都築伸二, 電子情報通信学会技術研究報告, 92, 136(IT92 35-50), 27, 28, 19920714, 0913-5685, http://jglobal.jst.go.jp/public/200902025053204273
  • Network design in the case of migration from TSS to PBX type LAN., 高山昭彦, 都築伸二, 山田芳郎, 田崎三郎, 電子情報通信学会技術研究報告, 92, 136(IT92 35-50), 53, 56, 19920714, 0913-5685, http://jglobal.jst.go.jp/public/200902058471051519
  • Color Image Clustering Based on Munsell Color-space., 沢田吾一, 山田芳郎, 田崎三郎, 都築伸二, 電子情報通信学会技術研究報告, 92, 136(IT92 35-50), 25, 26, 19920714, 0913-5685, http://jglobal.jst.go.jp/public/200902086516518700
  • Asymptotic Performance of Companded Vector Quantizer for the Sources with Memory., 山田芳郎, 近藤誉, 笹隆司, 田崎三郎, 都築伸二, 電子情報通信学会技術研究報告, 92, 56(IT92 1-10), 11, 14, 19920525, 0913-5685, http://jglobal.jst.go.jp/public/200902015202812618
  • A study on optimized data assigment for conventional ternary recoding code., 田崎三郎, 高島隆雄, 山田芳郎, 都築伸二, 電子情報通信学会技術研究報告, 92, 56(IT92 1-10), 37, 42, 19920525, 0913-5685, http://jglobal.jst.go.jp/public/200902031051706425
  • An experiment of quality evaluation for variable rate sampling color image I., 山田芳郎, 宮脇啓之, 新階健太郎, 田崎三郎, 都築伸二, 電子情報通信学会技術研究報告, 92, 56(IT92 1-10), 1, 4, 19920525, 0913-5685, http://jglobal.jst.go.jp/public/200902037888989733
  • A consideration of signal processing method for sample servo type on magneto-optical recording., 田崎三郎, 野口幹史, 山田芳郎, 都築伸二, 電子情報通信学会技術研究報告, 92, 56(IT92 1-10), 43, 48, 19920525, 0913-5685, http://jglobal.jst.go.jp/public/200902076358372390
  • A Study on Modeling Various Power Line Channels for Spread-Spectrum Communication System., 都築伸二, 小原英裕, 田崎三郎, 山田芳郎, 電子情報通信学会技術研究報告, 92, 16(SST92 7-13), 11, 16, 19920424, 0913-5685, http://jglobal.jst.go.jp/public/200902012488336347
  • Characteristics Improvement of Power Line Spread-Spectrum Communication System with FM-V5 Code Applied PRML Method., 都築伸二, 相原俊幸, 田崎三郎, 山田芳郎, 電子情報通信学会技術研究報告, 91, 509(SST91 38-48), 51, 56, 19920310, 0913-5685, http://jglobal.jst.go.jp/public/200902005382205263
  • IT92, 49, 19920000
  • E75-A, 9, 19920000
  • IT92, 49, 19920000
  • Interoperability technology of FDDI., 夏目晃宏, 木田泰, 都築伸二, 高山浩一, 吉田郁夫, システム制御情報学会研究発表講演会講演論文集, 34th, 369, 370, 19900000, http://jglobal.jst.go.jp/public/200902033540849711
  • Development of LSIs for the FDDI LAN., 都築伸二, 吉田郁夫, 夏目晃宏, 高山浩一, 木田泰, 電子情報通信学会全国大会講演論文集, 1989, Autumn Pt.3, 3.146, 19890900, http://jglobal.jst.go.jp/public/200902006174914672
  • A study on the distribution of preamble's length on an FDDI LAN., 高山浩一, 吉田郁夫, 夏目晃宏, 都築伸二, 木田泰, 電子情報通信学会全国大会講演論文集, 1989, Autumn Pt.3, 3.147, 19890900, http://jglobal.jst.go.jp/public/200902064226798528
  • FDDI based 100Mbps fiber-optic LAN., 木田泰, 都築伸二, 高山浩一, 夏目晃宏, 後藤範和, 吉田郁夫, 北島康司, SEIテクニカルレビュー, 134, 41, 48, 19890300, 1343-4330, http://jglobal.jst.go.jp/public/200902046717383615
  • 28, 19890000
  • High-speed backbone optical LAN., 谷本雅顕, 加集文敏, 原信吾, 梶田祐二, 池内勝, 萩原啓司, 北島康司, 都築伸二, 杉本和歳, SEIテクニカルレビュー, 131, 23, 30, 19870900, 1343-4330, http://jglobal.jst.go.jp/public/200902038865688481
  • An estimation of refractive index of optical waveguides fabricated in sodalime glass by field-assisted silver ion migration., 沢新之輔, 小野和雄, 都築伸二, 漁島直, 電子通信学会論文誌 C, 69, 6, 789, 792, 19860600, 0373-6113, http://jglobal.jst.go.jp/public/200902039435144328
  • J69-C, 6, 19860000
  • J69-C, 6, 19860000
  • 2236) On the Experimental Study by the R.C. Pile : No. 1, Takahashi Hideaki, 日本建築学会論文報告集. 号外, 学術講演要旨集, 一般社団法人日本建築学会, 日本建築学会論文報告集. 号外, 学術講演要旨集, 41, 19661000, http://ci.nii.ac.jp/naid/110003748627
  • 2237) On the Experimental Study by the R.C. Pile : No. 2, Tsuzuki Shinzi, 日本建築学会論文報告集. 号外, 学術講演要旨集, 一般社団法人日本建築学会, 日本建築学会論文報告集. 号外, 学術講演要旨集, 41, 19661000, http://ci.nii.ac.jp/naid/110003748628
  • Training counseling method to graduate school students of education by the setting of ICT educational counseling, Ehime University Institute of Education and Student SupportJournal of Faculty and Staff Development in Higher Education, 20110000
  • Channel Characteristic Comparison of Armored Shipboard Cable and Unarmored one, Jeju Island, Korea, IEEEIEEE-ISPLC2008, Session A1, 20080000
  • Shinji Tsuzuki Naoyuki Takeichi Yoshio Yamada, Performance evaluation of localization by DS-CDM signals, IEEEGlobal Telecommunications Conference (Globecom2006), San Francisco, USA,, -, -, WSN06-6, 20060000
  • Power-line Channel Modeling for Common-Mode Signal Transmission/Suppression, Shinji Tsuzuki, Michinori Yoshida, Yoshio Yamada, April 6-8, 2005, Vancouver, Canada (Oral presentation), 9th International Symposium on Power-Line Communications and Its Applications, (ISPLC 2005),, 20050000
  • A Study of Producing an LCL Probe for Residential Power-lines Yasuto Kawakami., Student Member, Shinji Tsuzuki., Member, Masaru Wasaki, Yoshio Yamada、Vol.124, No.7, pp.1375-1381, 2004., IEEJ Trans. EIS,, 124, 7, 1375, 1381, 20040000
  • Hirotada Furukawa, Shinji Tsuzuki, A Low Interference PLC Modem of Selecting Subcarriers based on LCTL Measurement, Zaragoza, Spain, 31 March to 2 of April 2004., 8th International Symposium on Power-Line Communications and Its Applications (ISPLC2004),, B3-3,, 20040000
  • Hirotada Furukawa, Masaru Wasaki, Masaski Katayama, Shinji Tsuzuki, Performance Improvement of In-House Power-Line for Communication, ISPLC2002, 60, 64, 20020000
  • Shinji TSUZUKI, Takeshi TAKAMATSU, Hideyuki NISHIO, Yoshio YAMADA, An Estimation Method of the Transfer Function of Indoor Power-line Channels for Japanese Houses, Proc. 6th International Symposium on Power-Line Communications (ISPLC 2002), Athens, 55, 59, 20020000
  • Measurement of Japanese Indoor Power-line Channel(共著), Proc. 5th International Symposium on Power-Line Communications and Its Applications, ISBN91-7167-021-1, Malmo, Sweden, 79, 84, 20010000
  • Power-line Communication,--Technology and Japanese Activity--, Tutorials, 3rd International Workshop on Networked Appliances, Singapore, 20010000
  • Utilization and Delay Performance Analysis of CSMA Protocol Enhanced by CDMA, Shinji TSUZUKI and Yoshio YAMADA, Memoirs of the Faculty of Engineering, Ehime University, (]G0010[)(]G0010[), 47, 55, 20010000
  • Study of Centralized Network-Resource Management Technique on ATM Network Environment, 3, ISSN, 1341-9928,16-22, 20000000
  • Utilizaton and Delan Performance Analysis of Carrier Sense CDMA Protocol(共著), Proc.2000 International Symposium on Power-Line Communications and Its Applications,ISPLC 2000,Limerick,Ireland,ISBN 1-87 4653-60-7, 80, 88, 20000000
  • Real-time Voice Communicatons on Ethernet--Implementation to a VSAT-Ethernet Gateway--(共著), Memoirs of the Faculty of Engineering,Ehime University, XIX, 79, 88, 20000000
  • Next Target of Spread Spectrum Technology--Application of Power Line Communication to Home Network, 43, 12, 637, 643, 19990000, 10.11509/isciesci.43.12_637
  • A Stream Data Gateway based on a Carrier Sense Multi-rate CDMA Protocol -- Dalay Performance --(共著), Memoirs of the Faculty of Engneering,Ehime University, XVIII, 171, 179, 19990000
  • A Class of Partial Response Spread M-Sequence-Its Encoders and Auto-correlation Property-(共著), Memoirs of the Faculty of Engineering, Ehime University, XVII, 91, 100, 19980000
  • "A Stream Data Gateway Based on a Carrier Sense Multi-rate CDMA Protocol,"(共著), Proc.International Symposium on Information Theory and its Applications,ISITA'98,Mexico City,Mexico, 2, 483, 486, 19980000
  • A Class of Partial Response Spread M Sequence and its Correlation Property, Proc. International Symposium on Power-line Communications and its Applications, Essen, ISBN 90-74249-11-6, 99, 103, 19970000
  • Satellite Communications Experiments by Universities, Section 3.7(共著), 80, 5, 448, 450, 19970000
  • Modified Antisymmetric M sequence and its Periodic Correlation Property(共著), IEICE Trans. Fundamentals, E80-A, 11, 2180, 2191, 19970000
  • Synchronization of Voice Data on Asynchronous Networks and its Implementation for a VSAT Channel Router(共著), 117-C, 11, 1557, 1565, 19970000
  • A Carrier Sensing CDMA Protocol Coexistable with a CSMA/CD Protocol(共著), Proc. IEEE Malaysia International Conference on Communication, Kuala Lumpur, Malaysia, S7.2.1-S7.2.7, 19970000
  • "A Class fo Partial Response Spread M Sequence and its Correlation Property"(共著), International Syposium on Power-line Communications and its Applications(Essen,Grmany), ISBN 90-74249-11-6, 99, 103, 19970000
  • "A Delay-Throughput Performance Comparison between CSSS/OD and CSMA/CD Protocols"(共著), Memoirs of the Fac.of Eng., Ehime Univ.,, 16, 177, 185, 19970000
  • Periodic Correlation Properties of FM Coded M Sequences Having DC Free Spectrum, IEICE Transactions on Fundamentals, E78-A, 10, 1127, 1135, 19960000
  • Even Periodic Correlation Propertes of FM Coded M Sequences Having DC Free Spectrum(共著), Memoirs of the Faculty of Engineering, Ehime University, XV, 133, 142, 19960000
  • Utilization Analysis of a Slotted Non-persistent Carrier Sense Spread Spectrum with Overload Detection (NP-CSSS/OD)Protocol(共著), Memoirs of the Faculty of Engineering, Ehime University, XV, 143, 150, 19960000
  • Multiple access perfomance of differential DS/SS systems for power line data transmission, IEEE Global Telecommunications Conference, Singapore, 1126, 1130, 19950000
  • Error Correction Using IFMV9 Coded Overlapped PN Sequence for Power Line SSMA : Part-II -Multiple Access Performance(共著), Memoirs of the Faculty of Engineering, Ehime University, XIV, 69, 78, 19950000
  • Generation of Pseudo-"Sequence Produced by Inversion of Alternate Values in PN Sequence" using FM family Codes, Proceedings of the 1994 IEICE Spring Conference, A-263, 1, 265, 19940000
  • An Algorithm to Control End to End Delay Time in Speech Communication on BSD UNIX Environment, Memoirs of the Faculty of Engineering, Ehime University, 13, 31, 40, 19940000
  • Error Correction using IFMV9 coded PN sequence for power line SSMA, The 16th Symposium on Information Theory and Its Applications, W23, 4, 125, 128, 19930000
  • Delay Time Control in Real-Time Speech Communication on UNIX Workstations, Technical Report of IEICE, SSE92, 196, 79, 84, 19930000
  • Error Rate Improvement of Power Line SS Communication System with FM-V5 Code and PRML Technique, IEICE TRANS. FUNDAMENTALS, E75-A, 9, 19920000
  • Network design in the case of migration from TSS to PBX type LAN, IEICE Technical Report, IT92, 49, 19920000
  • FDDI Based 100Mbps Fiber LAN, IEEE Tokyo Section Denshi Tokyo, 28, 19890000
  • An Estimation of Refractive Index of Optical Waveguides Fabricated in Sodaline Glass by Field-Assisted Silver Ion Migration, IEICE TRANS. J69-C, J69-C, 6, 19860000
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