Method of coding images at very low data rate and coding/decoding device implementing this method
US6580758B1 · kind B1 · utility
12Cited by
13References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 14, 1994 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Mar 14, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for differential coding of blocks of images includes coding the difference between a current block of an image to be transmitted and one of four blocks of the reconstructed current image in the closest vicinity of the current block. The device includes a differential image coding structure having a quantifier coupled to a variable-length coding device, a predictor and a device for reconstruction of the transmitted image coupled to a first image memory. The device further includes a second image memory for storing image blocks previously reconstructed in the image preceding the current image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.