Method for encoding and decoding images, device for encoding and decoding images and corresponding computer programs
US11350106B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2020 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Feb 24, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/88
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for decoding a data signal representative of at least one image cut into blocks. The method includes, for a current block to be decoded: transforming a residual data block obtained from the data signal; determining a permutation-transformation pair including a transformation mathematical operation and a permutation mathematical operation, the transformation mathematical operation and the permutation mathematical operation belonging to respectively a plurality of permutation operations and a plurality of transformation operations; applying the determined transformation mathematical operation to the data of the residual data block to produce transformed data; applying the determined permutation mathematical operation to the transformed data to produce permuted data, the determined permutation mathematical operation being an operation of transposing the transformed data; and using the permuted data to reconstruct the current block by a predictive decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.