Synchronization and error detection in a packetized data stream
US5703887A · kind A · utility
57Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1994 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Dec 23, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.