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1998 Fiscal Year Final Research Report Summary

A Study on a Set of Media Synchronization Protocols in Wireless Networks

Research Project

Project/Area Number 09650411
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 情報通信工学
Research InstitutionNagoya Institute of Technology

Principal Investigator

TASAKA Shuji  Nagoya Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (80110261)

Co-Investigator(Kenkyū-buntansha) SHIOKAWA Shigeki  Nagoya Institute of Technology, Faculty of Engineering, Assistant Professor, 工学部, 助手 (30303689)
ISHIBASHI Yutaka  Nagoya Institute of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (40252308)
Project Period (FY) 1997 – 1998
Keywordswireless network / wireless LAN / PHS / media synchronization / MPEG video / H.263 video / G.726 audio / H.223 Annex
Research Abstract

The research results can be classified into five categories. The first study examines four lip synchronization schemes for stored MPEG video and voice ; two schemes interleave voice and video into a single transport stream, and the others treat them separately. In each kind, one exerts synchronization control at the destination, while the other does not. In addition, we apply a dynamic resolution control scheme of MPEG video to the two schemes with synchronization control. We have implemented those schemes on an ALTAIR wireless LAN.The measured performance shows that heavily loaded networks need synchronization control and that the dynamic resolution control is effective.
Secondly, we study media synchronization on live MPEG video and voice as in the first study.
Thirdly, we propose a joint synchronization scheme among stored video, live voice and live video streams. The scheme takes advantage of the difference in the feature between live and stored media. We have implemented the scheme on an integrated ATM and wireless LAN and demonstrated its effectiveness.
The fourth study measures the quality of stored media synchronization under the slide control in PHS Internet access. A simple experimental system was developed for the transmission of H.263 video and G.726 audio from a media server to PHS mobile terminals. We examine the effects of Rayleigh fading in the PHS channels and the data load in the Internet on the media synchronization quality.
Lastly, we study the application of the slide control to interleaved transmission of live video and audio specified by the H.223 Annex in PHS.We also propose a QOS control scheme to control both media synchronization quality and transmission delay. Through simulation, we confirm the effectiveness of the scheme. In addition, we carry out an experiment of live G.728 audio transmission with PIAFS and UDP/IP.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Shuji Tasaka: "Dynamic resolution control and media synchronization of MPEG in wireless LAN" Conference Record of IEEE GLOBECOM '97. 138-144 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中村 剛: "ライブMPEGビデオ・音声のメディア同期方式の性能比較" 電子情報通信学会技術研究報告. SSE98-24 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 井上武志: "ライブ及び蓄積メディア同期転送時のメディア同期方式" 電子情報通信学会技術研究報告. CQ98-73 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 加藤正美: "PHS回線における蓄積メディア同期実験" 電子情報通信学会論文誌 B-I. Vol.J81-B-I, No.11. 709-719 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shuji Tasaka: "Stored Media Synchronization in PHS Internet Access" Conference Record of IEEE GLOBECOM '98. 113-119 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masami Kato: "Performance Evaluation of Media Synchronization in PHS with the H.223 Annex Multiplexing Protocol" IEICE Transactions on Communications. Vol.E81-B, No.12. 2423-2431 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shuji Tasaka: ""Dynamic resolution control and media synchronization of MPEG in wireless LANs"" Conference Record of IEEF,Global Telecommunications conference (GLOBE-COM'97). 138-144 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takeshi Nakamura: ""A performance comparison of media synchronization schemes for live MPEG video and voice"" Technical Report of IEICE. SSE98-24 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takeshi Inoue: ""A joint synchronization scheme between live and stored media"" Technical Report of IEICE. CQ98-73 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masamio Kato: ""Experiment on stored media synchronization over PHS channels"" Transactions of IEICE. 709-719 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shuji Tasaka: ""Stored media synchronization in PHS Internet access"" Conference Record of IEEE Global Telecommunications Conference (GLOBE-COM'98). 113-119 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masami Kato: ""Performance evaluation of media synchronization in PHS with the H.223 Annex multiplexing protocol"" IEICE Transactions on Communications. Vol.E81-B,No.12. 2423-2431 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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