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II.264 flow-media transmission control method based on real-time transmission/control protocl

A streaming media transmission and control protocol technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as low packet loss rate and large delay

Inactive Publication Date: 2007-06-13
CENT ACADEME OF SVA GROUP
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Problems solved by technology

Real-time video transmission requires a small transmission delay and a low packet loss rate. However, due to the large delay caused by the retransmission mechanism of TCP (Transmission Control Protocol), UDP (User Datagram Protocol) itself does not provide any QQ. O S guarantee, so a new protocol is needed to meet the high requirements of network video transmission on delay and packet loss

Method used

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  • II.264 flow-media transmission control method based on real-time transmission/control protocl

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Embodiment approach

[0051] As shown in Figure 1, be the schematic diagram of the H.264 streaming media transmission control method based on real-time transmission / control protocol provided by the present invention, utilize RTCP feedback information to realize control, it comprises the following steps:

[0052] Step 1. The server constructs SR messages and APP messages, and sends RTCP-SR control information and RTCP-APP detection packets to the client at a constant sending rate;

[0053] The RTCP-APP detection packet is used to detect network bandwidth changes, and because the RTCP-APP detection packet is small in size and flexible to use, it will not bring a burden to the network;

[0054] Step 2, the client receives and parses the RTCP-SR and RTCP-APP messages sent by the server, constructs RTCP-RR and RTCP-APP feedback messages and sends them to the server at a constant sending rate;

[0055] Step 3. After receiving the RTCP-RR and RTCP-APP messages fed back by the client, the server analyzes a...

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Abstract

Under condition of not increasing network load, using accurate effective feedback information provided by client end, the method analyzes and judges state of current network. Based on the analyzed result, the method adjusts size of RTP packet, and sending speed of video basic stream so as to realize dispatch control by server end. The method reduces time delay from server end to client end and rate of packet loss without increasing network burden. Transferred video provides good subjective effect.

Description

technical field [0001] The invention relates to a streaming media transmission control method, in particular to an H.264-based real-time transmission / control protocol (RTP / RTCP) video transmission transmission control method. Background technique [0002] With the rapid development of Internet and multimedia technology, the network real-time transmission of video has become one of the research hotspots of network application. The H.264 standard has become the main format and standard for multimedia transmission on the Internet at present and in the next generation due to its high compression rate, high quality and low bit rate. Real-time video transmission requires a small transmission delay and a low packet loss rate. However, due to the large delay caused by the retransmission mechanism of TCP (Transmission Control Protocol), UDP (User Datagram Protocol) itself does not provide any QQ. O S is guaranteed, so new protocols are needed to meet the high requirements of network...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L1/00
Inventor 腾国伟石旭利王红娟王国中
Owner CENT ACADEME OF SVA GROUP
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