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Bandwidth control method and system for video conference system

A video conferencing system and bandwidth control technology, applied in the direction of video conferencing systems, two-way working systems, etc., can solve problems related to system stability and increased difficulty in bandwidth control, and achieve the effect of good video picture quality

Active Publication Date: 2013-04-03
GUANGDONG VTRON TECH CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But behind more flexibility, there is a problem related to the stability of the entire system-the difficulty of bandwidth control increases

Method used

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  • Bandwidth control method and system for video conference system
  • Bandwidth control method and system for video conference system
  • Bandwidth control method and system for video conference system

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] To achieve a stable video conferencing effect, we need a complete set of bandwidth control strategies and user interaction design. If it is necessary for the video conferencing system to operate stably under a controllable bandwidth range, then we must make the total bandwidth used by us to transmit video, audio, and conference signaling between the terminal and the server not exceed the network environment where the system is deployed. bandwidth value. For example, if a user wishes to hold a conference with a bandwidth of 4Mbps, we believe that the bandwidth of all participating terminals reaching the MCU is at least 4Mbps, and our goal of bandwidth control is: video bandwidth + audio bandwidth + conference signaling bandwidth <= 4Mbps.

[0027] The bandwidth occupied by audio and conference signaling is basi...

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Abstract

The invention provides bandwidth control method and system for a video conference system. The method includes the steps of reading a bandwidth capacity table which is of bandwidth and video encoder correspondence and formed by distributing pre-defined video encoders to pre-divided bandwidth segments; judging whether multi-image window distribution of current video conference is geometric video distribution; and if yes, selecting the same video encoder for terminals. The video encoder is selected in such way: reference code rate is calculated according to total bandwidth of the video and the number of current sub-windows, and the video encoder with the corresponding code rate in the bandwidth capacity table, the most approximate to the reference code and smaller than or equal to the same, is selected. The method and system allow for bandwidth control for corresponding terminals of the sub-windows, the video conference system is enabled to stably operate in a controllable bandwidth range. The quality of images encoded by the system and method is better.

Description

technical field [0001] The invention relates to a video conferencing system, in particular to a bandwidth control method in the video conferencing system and a bandwidth control system in the video conferencing system. Background technique [0002] In the video conferencing system, the function of allowing the terminal to watch the multi-screen layout at the same time generally relies on the MCU (Multipoint Control Unit, multi-point control unit) to decode the input streams of different screens from different customers, and then synthesize them according to a certain multi-screen layout It is realized by re-encoding a picture containing multiple terminal video images to obtain an output code stream. The architecture of the video conferencing system can be found in figure 1 shown. [0003] In a conventional video conferencing system, the flow diagram of the MCU processing multiple streams can be found in figure 2 shown. Taking 4 code streams as an example, the MCU decode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/15
Inventor 刘明宇
Owner GUANGDONG VTRON TECH CO LTD
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