Method for fast data compression of half tone images with the use of pre-assigned codes
US5453843A · kind A · utility
7Cited by
6References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 25, 1993 |
| Grant date | Sep 26, 1995 |
| Priority date | — |
| Expiry date | May 25, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/415
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Data in the form of a sequence of data bits is compressed by separating the data into groups of data bits. A value is derived for the respective groups from the data contained therein. When a group has a derived value equal to the derived value of at least its adjacent group, a pre-assigned control code is used as compressed data. Such compressed data is representative of the data in consecutive groups of data having the same derived value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.