Video data playback system using effective scheme for producing coded video data for fast playback mode
US5887110A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1996 |
| Grant date | Mar 23, 1999 |
| Priority date | — |
| Expiry date | Mar 28, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8042
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video data playback system for reproducing requested video data by switching coded video data to be reproduced between normal playback coded video data and fast playback coded video data according to a requested playback mode, where the normal playback coded video data are encoded by a first video coding scheme using both intra-frame coding and inter-frame coding, while the fast playback coded video data are encoded by a second video coding scheme using only intra-frame coding and having a playback bit rate and a frame rate identical to those of the normal playback coded video data. The normal playback coded video data can be obtained by encoding the original video data first, then the fast playback coded video data can be obtained by encoding selectively decoded normal playback coded video data. Alternatively, the normal and fast playback coded video data can be obtained by synchronizing start and end of encoding by the first video coding scheme and encoding by the second video coding scheme.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.