Method and device for compression by the conditional encoding of digital image signals without loss of data
US4916544A · kind A · utility
11Cited by
10References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 24, 1987 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Sep 24, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To compress the values of the pixels of a digitalized image, the values of the pixels neighboring the pixel to be processed are memorized and, according to their respective values, a code number is produced leading to the encoding process according to a composed code or to the encoding of the pixel itself, with a prefix. The successive codes are formatted and concatenated to be memorized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.