Method and means for coding and decoding picture information
US4837617A · kind A · utility
10Cited by
8References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1988 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Feb 17, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/619
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for coding and decoding picture information is described. According to prior art two modes, are utilized for transmitting picture information, respectively. According to the present invention advantages are obtained in using a mixed mode, i.e. certain frequency components are transmitted with prediction and the remaining components without. In the invention two channels, with and without prediction, are utilized respectively. These channels are selectively connected by means of switches, which are controlled by a control means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.