Apparatus for excising (and reinserting) specific data from a compressed video data stream to reduce its transmission bandwidth
US5371547A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1993 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | May 20, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital compressed video signal transmission system includes a transport processor for segmenting compressed MPEG video data into transport cells for transmission. Prior to formation of the transport cells, at least a portion of the 32-bit MPEG slice start codes are excised from the compressed data. An entry pointer is generated to indicate the location of the beginning of a slice, which pointer is included in a transport cell header. In a corresponding receiver, the transport header is examined for a slice entry pointer, and if one is found, a slice start code is inserted in the transport payload data stream at the location indicated by the pointer so as to provide a signal according to the MPEG protocol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.