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Stream control method and device for TV conference system

A video conferencing and flow control technology, applied in the field of communication, can solve problems such as poor image effects, achieve the effect of smooth code flow and prevent channel packet loss

Inactive Publication Date: 2007-07-25
ZTE CORP
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Problems solved by technology

[0005] The present invention aims to provide a solution for flow control under the limited bandwidth of the video conferencing system, which realizes the problem of poor image effect caused by burst media flow by limiting the flow in front of the limited channel

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  • Stream control method and device for TV conference system
  • Stream control method and device for TV conference system

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Embodiment Construction

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0034] Figure 1 is a schematic diagram of the method of the present invention. The present invention proposes to add flow control in the media sending link, use the token bucket algorithm to ease the flow of encoded data, and properly control the flow coefficient of the algorithm according to the frequency of instructions from the other party's VCU to obtain better results (including smaller Image delay, better image effect).

[0035] The present invention provides a flow control method for a video conferencing system, as shown in Figure 2, comprising the following steps:

[0036] Step S202, the encoder encodes the video conference media stream in real time and outputs it in real time;

[0037] Step S204, the token bucket caches the encoded media stream from the encoder to form a total amount of tokens; and

[0038] In step S206, ...

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Abstract

The method comprises: the encoder real-time encodes the media stream of TV conference and real-time outputs the media stream; the token buffers the encoded media stream from the encoder to form the total amount tokens; the rectifier controls the token barrel to smoothly output the tokens in the total amount of tokens so as to get the encoded media stream limited by the bandwidth of TV conference. The invention also provides a stream control device for use in TV conference system.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, to a flow control method and device for a video conferencing system. Background technique [0002] With the development of video conferencing, ITU-T (ITU Communication Standardization Sector) announced H.239 signaling to support the transmission of computer screen data. By collecting computer screen images and using the ability to negotiate, the images are transmitted to the opposite end. In order to achieve the effect of content presentations such as PPT (PowerPoint software) presentations by conference participants to other participants. Due to the characteristics of computer screen images, in order to achieve a clear effect, it is generally collected and encoded according to the original resolution and transmitted, resulting in quite a lot of I frame image data. When the MTU (Maximum Transmission Unit, maximum transmission unit) is 1.5K, an I A frame can often be encod...

Claims

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Application Information

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IPC IPC(8): H04N7/15H04N7/26H04L29/06H04N19/156H04N19/184
Inventor 薛尧舜
Owner ZTE CORP
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