Method and system for processing packet loss in international protocol television (IPTV) system as well as server

Abstract

The invention discloses a method for processing packet loss in an international protocol television (IPTV) system, comprising the following steps: analyzing network abstraction layer (NAL) head and Slice head data of media data to be sent, and confirming order of precedence of data packets in the media data to be sent; acquiring the result information returned by a client-side in accordance with the received media data, wherein the result information at least comprises data loss information of the media data received by the client-side; according to the data loss information, determining the congestion level of the current transmission network; and according to the congestion level of the current transmission network and the order of the precedence of the data packets, combining with preset packet loss strategies to process the packet loss. The invention discloses a stream media server and a system for processing packet loss in an IPTV system. By judging the congestion level of the network and combining with the preset packet loss strategies, the data packets are abandoned selectively and actively. The problem that decoding can not be performed so as to seriously influence the decoding quality of information destination ends because key data packets in the media data are abandoned at random can be avoided.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, server and system for packet loss processing in an IPTV system. Background technique [0002] With the rapid development of streaming media services, the content and forms of streaming media services are rich and varied, and more and more users enjoy various audio and video services through set-top boxes or mobile phones. Due to its own technical characteristics, the streaming media service's wide application is affected by video coding efficiency and network transmission quality. [0003] Video coding technology can achieve a large amount of video data compression, which is the prerequisite for the widespread development of streaming media services. With the advancement of video coding technology, video data coding efficiency has been greatly improved, especially the promotion of H.264 coding algorithm, which has promoted the development of streaming media services. ...

AI Technical Summary

Problems solved by technology

Through the TCP transmission mechanism, it can ensure that there is no loss of data packets on the transmission link between the source and the destination. However, since the application layer of the source server does not monitor the status of the network layer in real time, it is very likely that the network layer buffer will be written. If the rate is greater than the read rate, it will eventually lead to the overflow of the sending buffer and the loss of data packets

[0007] Using ARQ technology or TCP technology, in the case of network congestion, because the data packets are randomly discarded, when the lost is just the key data, the images of all the frames of the entire sequence cannot be decoded, which will seriously affect the destination. end-decode quality

The file played by the terminal is severely distorted, delayed, or even unable to play, and the user experience is poor.

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