| Presentation | 2002/4/12 Dependable Video Conference System Using Convolutional Codes Masayuki ARAI, Hitoshi KUROSU, Mamoru OHARA, Ryo SUZUKI, Satoshi FUKUMOTO, Kazuhiko IWASAKI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In video conference systems over the Internet, audio and video data are transmitted using UDP. Therefore, QoS degradation due to packet losses is a serious problem. In this paper we describe a dependable video conference system, based on the application of the two following techniques: (1) packet loss recovery using convolutional codes, which improves the dependability of communication; and (2) Xcast, a multicast that is designed for relatively small groups, which reduces the bandwidth required for a multi-point conference. We added these functions to the GK(Gatekeeper), a device used in conventional conference systems. Encoding/decoding and Xcast routing are then implemented as the upper layer of UDP. We investigated the effectiveness of the proposed system in experiments using an Internet simulator. We also tested the implementation and functioning of the system over the Internet in a multi-point conference between the networks of our university (metro-u.ac.jp) and our laboratory (toritsudai.jp). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | video conference system / convolutional codes / H.323 / Xcast / packet loss |
| Paper # | DC2002-4 |
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| Committee | DC |
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| Conference Date | 2002/4/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Dependable Computing (DC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Dependable Video Conference System Using Convolutional Codes |
| Sub Title (in English) | |
| Keyword(1) | video conference system |
| Keyword(2) | convolutional codes |
| Keyword(3) | H.323 |
| Keyword(4) | Xcast |
| Keyword(5) | packet loss |
| 1st Author's Name | Masayuki ARAI |
| 1st Author's Affiliation | Graduate School of Engineering, Tokyo Metropolitan University() |
| 2nd Author's Name | Hitoshi KUROSU |
| 2nd Author's Affiliation | Graduate School of Engineering, Tokyo Metropolitan University |
| 3rd Author's Name | Mamoru OHARA |
| 3rd Author's Affiliation | Graduate School of Engineering, Tokyo Metropolitan University |
| 4th Author's Name | Ryo SUZUKI |
| 4th Author's Affiliation | Graduate School of Engineering, Tokyo Metropolitan University |
| 5th Author's Name | Satoshi FUKUMOTO |
| 5th Author's Affiliation | Graduate School of Engineering, Tokyo Metropolitan University |
| 6th Author's Name | Kazuhiko IWASAKI |
| 6th Author's Affiliation | Graduate School of Engineering, Tokyo Metropolitan University |
| Date | 2002/4/12 |
| Paper # | DC2002-4 |
| Volume (vol) | vol.102 |
| Number (no) | 28 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |