Control of video decoder for reverse playback operation
US9191681B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 2012 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | May 12, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video decoder includes a mode of operation for reverse playback that includes dividing a sequence of coded video data into groups of pictures (GOPs) and further subdividing the groups of pictures into a plurality of spans. Each span is processed in reverse coding order by decoding the first key frame and any reference frames that precede the currently processed span in coding order, selecting a plurality of frames from the currently processed span for decode and display and further selecting for decode but not display any reference frames from the currently processed span that were omitted by the first selection. The method accommodates control parameters that define the number of spans selected from each GOP and the number of frames selected from each span for decoded and display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.