Adaptive FEC mechanism based on media content

Abstract

The present invention provides an adaptive FEC (Forward Error Correction) mechanism based on the media content. The mechanism classifies the media content and gives different significances, and the mechanism dynamically regulate the degrees of importance of frames included in the media data and the corresponding encoding schemes according to the current channel state in the condition without performing shunt of the current media data stream and transmits a data packet to a corresponding FEC encoder to perform protection with different degrees and finally encode one source data flow to an FEC code stream. The adaptive FEC mechanism based on the media content reduces the great data bulk caused by the FEC while ensuring the quality of the media content to the utmost extent; the adaptive FEC mechanism based on the media content does not need the shunt of the source data stream to reduce the complexity of the FEC encoding of a sending terminal and improve the efficiency of the FEC encoding; one source data stream only can encode and generate one FEC code stream so as to greatly reduce the increasing of the data bulk caused by the FEC encoding; and the adaptive FEC mechanism based on the media content can dynamically regulate the encoding scheme according to the changing of the current network state so as to has higher adaptability for the time varying network.

Description

technical field [0001] The present invention relates to the technical field of multimedia transmission, and more specifically, to an adaptive FEC (forward error correction) mechanism based on media content. Background technique [0002] In the heterogeneous network media service system, the content is distributed to the terminal through the Internet protocol or broadcast protocol, the Internet uses IP / TCP or UDP packets to transmit media data, and the broadcast transmits content through MPEG2-TS. UDP packets may be lost after passing through multiple network devices, and broadcast TS streams may cause bit errors due to the influence of the transmission environment, resulting in broken screens or sound pauses on the terminal side. [0003] FEC (Forward Error Correction, Forward Error Correction) technology is a coding technology widely used in communication systems. The server side performs error correction encoding on the media data, adds redundant information and sends it ...

AI Technical Summary

Problems solved by technology

[0010] In view of the defects in the prior art, the purpose of the present invention is to provide an adaptive FEC mechanism based on media content, so as to solve the problem of good real-time performance but poor accuracy, good accuracy but poor real-time performance, and excessive FEC coding in the current FEC system. data congestion

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