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Method of enhancing vedio signal by discarding packets and using retransmission

A video signal, packet loss and retransmission technology, applied in the direction of pulse modulation TV signal transmission, transmission system, electrical components, etc., to achieve the effect of eliminating pauses, solving network congestion, and coherent playback

Inactive Publication Date: 2007-02-21
BEIJING INTERNET INST
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Problems solved by technology

[0005] The purpose of the present invention is to provide a video signal enhancement method using packet loss and retransmission. The method does not change the original RTP / RTCP protocol, but improves on the basis of the RTP / RTCP protocol to solve the problem of video signal transmission. Packet loss in the process, thereby improving the quality of video signal transmission

Method used

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  • Method of enhancing vedio signal by discarding packets and using retransmission
  • Method of enhancing vedio signal by discarding packets and using retransmission

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Embodiment Construction

[0022] refer to figure 1 , the present invention is a kind of enhancement method using packet loss retransmission to video signal, it comprises the following steps:

[0023] a) After the video signal sending end sends an RTP packet generated each time to the video signal receiving end, then put the RTP packet into the history buffer;

[0024] b) The video signal receiving end receives the RTP data packet transmitted by the video signal sending end, and judges whether there is a packet loss phenomenon before the RTP data packet transmitted this time. If the judgment result is that there is no packet loss phenomenon, the video signal receiving end sends the The RTP data packet is put into the RTP linked list and framed, and no retransmission request is sent to the video signal sending end, otherwise, the video signal receiving end puts the RTP data packet into the RTP linked list, but does not perform framing, but sends the video signal The signal sender issues a retransmission...

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Abstract

The method comprises: the video sending end sends the RTP packet generated in each time, and puts it into history buffer area; the receiving end decides if there is packet-loss happened before receiving the RTP packet; if not, the RTP packet is placed into RTP linked list to make framing; otherwise, sending a retransmission request to the sending end; after receiving the retransmission request, the sending end retransmits all RTP packets; the receiving end receives the retransmitted RTP packets, and puts them into the linked list to make framing; if the receiving end receives a same RTP packet again, it will generate a retransmission failure report; after receiving the report, the sending end stops transmitting the RTP packet, and informs the upper layer application program to handle it.

Description

technical field [0001] The invention relates to a video signal enhancement method, in particular to a video signal enhancement method based on RTP / RTCP protocol and using packet loss retransmission. Background technique [0002] For the transmission of Internet multimedia data streams, currently known protocols include RTP (Real-time Transport Protocol) and RTCP (Real-time Transport Control Protocol). The purpose of the RTP protocol is to realize the synchronous transmission of multimedia data streams and provide transmission time information of multimedia data streams. The RTCP protocol mainly provides flow control and congestion control, and is responsible for the exchange and management of control information between current application processes. During the session, RTCP packets are periodically transmitted between application processes, and the RTCP packets mainly include statistical information such as the number of sent data packets and the number of lost data packet...

Claims

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Application Information

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IPC IPC(8): H04N7/24H04L29/06
Inventor 华宁刘东陆乐董新久石宇光陈东
Owner BEIJING INTERNET INST
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