Method for formatting compressed video data into transport cells
Patent 5365272 Issued on November 15, 1994. Estimated Expiration Date: July 2, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
375/240.25, Specific decompression process370/473, Transmission of a single message having multiple packets370/474, Assembly or disassembly of messages having address headers375/240.15, Bidirectional375/285, Antinoise or distortion714/822Sequential repetition
A digital compressed video signal transmission system includes a transport processor for segmenting compressed MPEG video data into transport cells for transmission. Several protocol levels are utilized to uniquely define transmitted data, provide system synchronization and to provide for detection of lost or corrupted data. Transport cells are formed of three levels, the first of which indicates the service to which the data relates and includes a field indicating the state of signal scrambling. The second level includes a field identifying the one of several alternative formats in which the cell payload is arranged, and a continuity count for determining data continuity. The third level includes the payload and a field which indicates decodable entry points for re-entering the data stream after having lost data.
Other References
ISO-IEC JT (1/SC2/WG1), "Coding of Moving Pictures and Associated Audio" MPEG 90/176 Rev. 2, Dec. 18, 1990
A. Artieri et al., "A Chip Set Core For Image Compression", SGS-Thomson Microelectronics, Image Processing Unit, 17, avenue des Martyrs-B.P. 217, 38019 Grenoble Cedex, France
Digicipher HDTV System, General Instrument Corp., Videocipher Division, 6262 Lusk Blvd., San Diego, Calif., Jun. 8, 1990
J. Zdepski et al. "Prioritized Packet Transport of VBR CCITT H. 261 Format Compressed Video on a CSMA/DC Lan" presented at the Third Annual Workshop on Packet Video, Morristown, N.J. Mar. 22, 199