Methods and devices for filtering and coding a digital signal
US8588539B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2009 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Sep 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/46
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To filter a digital signal, in which, for each sample of the signal, a plurality of context functions take account of a predetermined number of other samples of the signal: the value of a context function from the plurality of context functions for each sample to be filtered is calculated; the signal is divided into a set of sub-signals corresponding respectively to the different values of the context functions; and, for each sub-signal: an optimal filter is determined according to a first criterion that depends on the values of the sub-signal; and the optimal filter is associated with the context function corresponding to the sub-signal.Application to the coding of a digital signal representing an image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.