MEDIA CONTENT-BASED ADAPTIVE METHOD, DEVICE AND SYSTEM FOR FEC CODING AND DECODING OF SYSTEMATIC CODE, AND MEDIUM

摘要

Provided are a media content-based adaptive method, device and system for FEC coding and decoding of a systematic code, and a medium. The method comprises: according to the importance of media content, dividing source data into N types of source data packets according to priorities; generating N types of intermediate codes according to the N types of source data packets and the priorities thereof; according to the N types of intermediate codes, setting recovery data of N types of source data according to a channel condition, and generating N types of coded symbols of systematic codes; receiving the coded symbols, and sorting and arranging the coded symbols according to decoding requirements; and according to the number of received coded symbols, decoding same to obtain intermediate codewords according to different situations, and recovering corresponding source data packets according to intermediate codewords. According to the present invention, the quality of the media content is ensured to the greatest extent, and data redundancy caused by FEC is reduced. It is not necessary to shunt a source data stream, which reduces the complexity of FEC coding at a sending end and improves the efficiency of FEC coding. A coding scheme can be dynamically adjusted according to a change in a current network state, so that the adaptability is stronger.