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Audio mixing method in multiple-MCU video conference system

A video conferencing system and sound mixing technology, which is applied to video conferencing systems, two-way working systems, etc., can solve problems such as system unavailability, large audio delay, and high computational complexity, so as to improve transmission delay and avoid system unavailability. Effect

Inactive Publication Date: 2007-04-25
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

[0005] There are two main problems in the above cascading method and mixing method: (1) the audio delay is large
The computational complexity of the master MCU is greater than that of other slave MCUs, and when there is a problem with the master MCU (such as a crash), it will cause the entire system to be unavailable

Method used

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  • Audio mixing method in multiple-MCU video conference system
  • Audio mixing method in multiple-MCU video conference system
  • Audio mixing method in multiple-MCU video conference system

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Embodiment Construction

[0019] (1) All MCUs are registered to the gatekeeper (GateKeeper, hereinafter referred to as GK), and each MCU establishes a pairwise connection with other MCUs, and each MCU maintains a list of connections with other MCUs and A list of local clients that need to be mixed, that is, two-to-two connections between MUCs are realized through GK.

[0020] As shown in FIG. 1 , the present invention does not distinguish between the master MCU and the slave MCU when the MCUs are cascaded, and each MCU belongs to the same level, and two-two connections are established between the MCUs to form a mesh topology. Whether to establish a connection between MCUs and open a media channel is determined by GK dynamic scheduling.

[0021] For a certain client, the MCU directly connected to it is called a local MCU, and other MCUs connected to the local MCU become remote MCUs; for a certain MCU, the client directly connected to it is called a local client , and the clients indirectly connected to...

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Abstract

The invention relates to a mixing method in multi-MCU video conversation system. Wherein, (1), all MCU register to gatekeeper, while each MCU has one-to-one connection with other MCU and each MCU maintains one connection list with other MCU and one local client list with mixing demand; (2), MCU based on local mixing client list linearly layers the voice data sent from local client, and codes and sends result to each opposite MCU; (3), MCU reduces the sent voice data from mixed result to be mixed with the decoded voice from opposite MCU, to be coded and sent to target client. The invention can reduce the transmission jump number of voice data and avoid single-point accidence of main MCU, with high reliability.

Description

field of invention [0001] The invention belongs to the field of computer network multimedia communication, and mainly relates to a method for forwarding and mixing audio data in a multi-point video conference in which a plurality of multi-point control units MCUs are cascaded. Background of the invention [0002] Video conferencing systems have been widely used in government departments, business, education, medical care and personal life. Real-time face-to-face video and audio communication not only facilitates people's lives, saves a lot of travel expenses, improves work efficiency, but also promotes the development of video conferencing related technologies. People have also put forward higher requirements for video conferencing systems. [0003] The multi-point control unit MCU is an important part of the video conference based on the H.323 standard. As people's calls for large-scale and popular video conferencing systems are increasing day by day, single MCU video con...

Claims

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Application Information

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IPC IPC(8): H04N7/15
Inventor 李未陈舟锋苏袆邹建峰沈伟丁嵘顾钰钏
Owner BEIHANG UNIV
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