Variable display rate image coding
US5828381A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1995 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Nov 13, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8042
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided to enable variable speed play of motion-prediction coded sequences of video signal frames. Prior to encoding, input image frames (S1,S2) are reduced in size with further image frames (M1,M2) being formed, each including two or more of the spatially reduced input image frames. Following decoding of the motion-prediction coded sequence of further image frames, display image update rates greater than the image decoding rate by a factor determined by the ratio of input sequence frames to a further image frame may be achieved. Particular applications of the method and apparatus are in interactive display systems where image update rates may be varied under user control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.