PROCÉDÉ, DISPOSITIF, ET SYSTÈME ADAPTATIFS BASÉS SUR UN CONTENU MULTIMÉDIA POUR LE CODAGE ET LE DÉCODAGE FEC D'UN CODE SYSTÉMATIQUE, ET SUPPORT

摘要

The present invention provides a method, device, system and medium for adaptive system code FEC encoding and decoding based on media content. The method comprises: according to importance of media content, dividing a source data into N types of source data packets according to a priority; according to the N types of the source data packets and the priorities thereof, generating N types of intermediate codes; according to the N types of the intermediate codes, setting recovery data of the N types of the source data according to a channel condition, generating encoded symbols of N types of system codes; receiving the encoded symbols, sorting and arranging the encoded symbols according to a decoding requirement; according to the number of received encoded symbols, decoding to obtain an intermediate codeword depending on conditions, and recovering a corresponding source data packet according to the intermediate codeword. The present invention maximizes quality of the media content, reducing data redundancy caused by FEC; does not need to split source data stream, reducing complexity of FEC encoding at a sending end and improving efficiency of FEC encoding; may dynamically adjust coding scheme according to change of current network state, having stronger adaptability.