Generation of a secondary video bitstream from a compressed video bitstream to enhance playback performance
US5768536A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1995 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Oct 26, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video decoder system affords playback of video information corresponding to a compressed video bitstream while demanding less processor performance than traditionally required. One method embodiment includes preprocessing the compressed video bitstream to generate a secondary video bitstream which includes information useful for decoding the compressed video bitstream in a more processor efficient manner than would be achievable by decoding the compressed video bitstream alone. The secondary video bitstream is then stored for use during a subsequent playback mode. When in the playback mode, the compressed video bitstream is decoded by processing both the compressed video bitstream together with the secondary video bitstream. The secondary video bitstream may be stored on a system hard disk where it may be read much faster than if stored on a CD-ROM and may be deleted when not needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.