Method and apparatus for facilitating reverse playback
US7164844B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2000 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Mar 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8042
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for processing recorded coded audiovisual data to facilitate reverse playback permits the user to play back recorded material in a temporally reversed manner at speeds of at least 1X or greater by storing the decoded frames in a graphics accelerator memory of a recording system. By storing decoded MPEG video frames representing the audiovisual data in the graphics accelerator's memory, it is possible to display all the frames of a group of pictures GOP in reverse order. Instead of using the memory of a graphics accelerator, the apparatus may also be configured to have sufficient space available in memory to store the decoded MPEG video frames. In either configuration, reverse playback may be effectuated with a much finer temporal granularity than what is currently achievable by conventional video recording apparatuses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.