Temporal decorrelation of block artifacts
US5107348A · kind A · utility
16Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1990 |
| Grant date | Apr 21, 1992 |
| Priority date | — |
| Expiry date | Jul 11, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/98
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video signal comprising a successive series of frames is sub-band coded to derive a plurality of groups of coefficients for each frame. Each group of coefficients comprises a spectral representation of the video content of a respective portion of the frame, which portions are spatially decorrelated relative to the corresponding portions of the immediately preceding and immediately following frames to reduce block artifacts in the reproduced image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.