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Application tier combined playing method for multi-point video conference system based on reciprocal interconnection

A video conferencing system and video conferencing technology, applied in the application layer multicast field of multi-point video conferencing system, application layer multicast field, can solve the inconsistency between the application layer coverage network and the IP layer coverage network, cannot multicast, low bandwidth, etc. question

Inactive Publication Date: 2004-09-15
SHANGHAI JIAO TONG UNIV
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AI Technical Summary

Problems solved by technology

The advantage of this distributed hash table routing algorithm is that it has good scalability. The disadvantage is that the application layer overlay network constructed by it is inconsistent with the IP layer overlay network, the delay is large, and the bandwidth is low. It cannot be used for real-time video and audio application layer grouping. broadcast

Method used

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  • Application tier combined playing method for multi-point video conference system based on reciprocal interconnection
  • Application tier combined playing method for multi-point video conference system based on reciprocal interconnection
  • Application tier combined playing method for multi-point video conference system based on reciprocal interconnection

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Embodiment Construction

[0041] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. details as follows:

[0042] A. Activate the "Peer-to-Peer Multipoint Video Conference" plug-in from the instant messaging software, and select the people to participate in the conference;

[0043] B. Use a distributed election algorithm to elect the "peer coordinator" of the conference among the participants of the conference to coordinate the organization of the video conference and the processing / control of audiovisual data;

[0044] C. Use an algorithm based on distributed hash table and area clustering to get a list of forwarding candidates;

[0045] D. Use a friend list-based algorithm to construct a forwarding candidate list;

[0046] E. The "peer coordinator" elected by step A inserts the candidates obtained in steps C and D into multiple application layer multicast trees, and one application layer multicast tree is responsible for distribu...

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PUM

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Abstract

The method includes following steps: (1) plug-in package of peer-to-peer interlinkage multipoint video conferencing is activated from instant message software, and people taking part in meeting is selected; (2) coordinator of peer-to-peer body is elected among participators by using distributivity election algorithm to coordinate organizing of video conferencing and treating / controlling video / audio data; (3) using distributed Hash table and region clustering algorithm obtains list of forwarding candidates; (4) using algorithm based on hail-fellow list to construct list of forwarding candidates; (5) coordinator inserts coordinators obtained from (3) and (4) into multiple multicast trees in application layer; one multicast trees in application layer is in charge of distributing one route of video / audio coding stream. The invention makes multicast network in application layer consistent with IP layer covered network, possessing features of small time delay, large bandwidth, improving transmission quality of video / audio.

Description

Technical field [0001] The invention relates to an application layer multicast method, in particular to an application layer multicast method of a multipoint video conference system based on peer-to-peer interconnection. It belongs to the field of video conference systems in communications. Background technique [0002] In recent years, more and more video conferencing systems have been deployed on the Internet. However, traditional large-scale video conferencing systems are centralized and require many dedicated multipoint control units to handle the processing and control of video and audio data streams. For example, Megaconference is currently one of the largest video conferencing systems in the world. It has more than 200 clients in a conference and uses 25 multipoint control units. This centralized feature requires a large number of dedicated multipoint control units, and is prone to single-point failures and ineffective use of network resources. Currently, 40% of home users...

Claims

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Application Information

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IPC IPC(8): H04N7/15
Inventor 谢波刘吟申瑞民刘文印蒋昌俊
Owner SHANGHAI JIAO TONG UNIV
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