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Method for controlling AVS fluid-medium transmission

A technology of streaming media transmission and control method, which is applied in the direction of transmission system, digital transmission system, electrical components, etc., can solve the problems of unfixed decoding rate, overflow and underflow of buffer area at the receiving end, etc., to ensure service quality, The effect of suppressing buffer overflows

Inactive Publication Date: 2007-11-21
SHANGHAI UNIV
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Problems solved by technology

However, this kind of calculation fails to take into account the status of the receiving end buffer area. In practical applications, since the rate at which the decoder decodes from the buffer area is not fixed, if the sending end sends too fast, it may cause the receiving end to buffer Area overflow, otherwise, underflow will occur

Method used

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  • Method for controlling AVS fluid-medium transmission
  • Method for controlling AVS fluid-medium transmission
  • Method for controlling AVS fluid-medium transmission

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Embodiment Construction

[0035] A preferred embodiment of the present invention is described in detail as follows in conjunction with accompanying drawing:

[0036] Referring to Fig. 1, this AVS streaming media transmission control method is to estimate the sending rate of the sending end by counting the output rate of the buffer at the receiving end, and then feed back to the sending end through RTCP; at the sending end, compare the predicted transmission rate with the set The transmission rate is adjusted by comparing the sending rate fed back by the receiving end.

[0037] Its control steps are as follows:

[0038] 1) Suppose the average time interval λ of the arrival of a single data packet, and the average decoding and playback time T of each frame of the decoder and player S , when the total data packet has one frame, it is sent to the decoder for decoding and then sent to the player for playback. The receiving end is regarded as the M / M / 1 vacation model of the N strategy, and the initial value...

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Abstract

The method comprises: counting the output rate of the buffer at receiving end; estimating the sending rate of the sending end; feeding back it to the send end via RTCP; at send end, the estimated transmission rate and the transmission rate returned from the receiving end are compared in order to adjust the transmission rate. The invention controls the buffer overflow and keeps the Quos of video transmission.

Description

technical field [0001] The invention relates to an AVS stream media transmission control method, in particular to a real-time video transmission rate control mechanism designed using the RTP / RTCP protocol. Background technique [0002] With the rapid growth and popularity of the network, people's demand for multimedia information is also increasing, and real-time streaming media for network transmission emerges as the times require. The traditional TCP / IP protocol transmission mechanism and congestion control are not suitable for real-time transmission of network multimedia. , the UDP protocol itself does not provide any Qos guarantee, therefore, the real-time transport protocol family RTP / RTCP [1] is widely used in various multimedia transmission systems to provide real-time data transmission and Qos services to meet the requirements of real-time transmission of audio and video data . In the multimedia field, video occupies a large part of the content, so video compression...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L47/267
Inventor 张倩方勇王超吴美武
Owner SHANGHAI UNIV
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