System for tile coding of moving images
US5471248A · kind A · utility
48Cited by
6References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1992 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Nov 13, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video image frame consisting of a two-dimensional array of picture elements (pixels) is decomposed into a set of rectangular image portions (tiles). Within each tile, variance between pixel intensity values is less than a predetermined value. A tile is encoded by a value set identifying the tile and including a single intensity value for all pixels in the tile. Frame-to-frame variation of the video image is encoded by inter-frame tile comparison and encoding of sub-tiles representative of change from a previous frame to a current frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.