Method and device for predictive picture encoding and decoding
US11368695B2 · kind B2 · utility
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4References
20Claims
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Key dates
| Filing date | Mar 15, 2018 |
| Grant date | Jun 21, 2022 |
| Priority date | — |
| Expiry date | Mar 15, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for encoding a block of a picture is disclosed. The method comprises for at least one sample of the block and for one current component: —obtaining a prediction value; —determining a mapped residual value from a source value of the sample and from the prediction value responsive to a mapping function; and —encoding the mapped residual value into a bitstream; wherein the mapping function is derived to obtain at least one of a reduction of a bit cost of the bitstream for a given quality of reconstruction or an increase of quality of reconstruction for a given bit cost of the bitstream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.