Bit-plane dependent signal compression
US6501397B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2000 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | May 25, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/46
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a variable coding of the bit-planes for a particular source signal. This includes first partitioning or grouping the different bit-planes into embedded sub-signals and then coding each sub-signal. This technique enables an encoder according to the present invention to control and achieve a desired trade-off point between scalability and coding-efficiency. Therefore, in cases where bit or bit-plane level granularity is not required, coding efficiency can be improved by combining two or more bit-planes prior to coding. In addition, since the statistical nature of each bit-plane is different, the level of grouping used across the bit-planes can vary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.