Image encoding method, image encoder, image decoding method, and image decoder
US6493385B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2000 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Apr 6, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a picture coding apparatus, even though conditions such as a bit rate are changed, a burden of overhead information arranged in a picture signal is reduced, and the picture signal is coded according to an optimum coding mode without lowering a coding efficiency. A coding mode judging unit 2 has two coding mode tables A and B including identification numbers of coding modes selectable for a picture-to-be-coded, one of the coding mode tables 1 and 2 is selected according to coding mode table selection information, a coding mode corresponding to a better coding efficiency is selected from a plurality of coding modes of the selected coding mode table, and a coded picture signal is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.