Digital signal coding and decoding
US6580757B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1999 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Jan 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital signal coding method includes a step of analysing the digital signal into a plurality of frequency sub-bands distributed according to at least two different resolutions, at least one first sub-band having a lower resolution and at least one second sub-band having a higher resolution. The method includes, for each second sub-band, the steps of dividing the second sub-bands into target blocks, selecting, for each of the target blocks, a predetermined number of source blocks in the at least one first sub-band, and determining, for each of the target blocks, a multilinear approximation between the source blocks selected at the preceding step and the target block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.