Synchronization and error detection in a packetized data stream

Details Synchronization and error detection in a packetized data stream Synchronization and error detection in a packetized data stream

H - Electricity

04

L

H04L 7/04 (2006.01) H03M 13/33 (2006.01) H04N 7/50 (2006.01) H04N 7/64 (2006.01) H04N 7/24 (2006.01) H04N 7/62 (2006.01)

Patent

CA 2165604

A method and apparatus are provided for achieving synchronization and detecting errors in a data stream such as an MPEG-2 transport packet stream. In an MPEG embodiment, the MPEG sync word is removed and replaced with a parity code that is used at the decoder for both synchronization and error detection. A syndrome calculator in the decoder can be implemented using a unique one bit in, one bit out FIR filter. Codewords used to generate the parity code can be provided by a linear block code that is a dual of a shortened cyclic code.

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