METHOD AND APPARATUS FOR BACKWARD-COMPATIBLE ERROR CORRECTION FOR REAL TIME COMMUNICATION LINK

摘要

A method of error correction coding includes providing a source sequence of information bits that is encoded to produce a sequence of N information codewords. A parity-check codeword is generated by performing a bit-by-bit exclusive OR operation between successive information codewords in the sequence of N information codewords. The sequence of N information codewords and the parity-check codeword are transmitted on a communication channel. The source sequence of information bits includes MPEG-2 transport stream packets and the information codewords and the parity-check codeword each comprise an AAL5 protocol data unit. The AAL5 protocol data unit includes a user-to-user indication field for differentiating between an information codeword and a parity-check codeword.