Methods and devices for coding and decoding a data stream representative of at least one image
US11736721B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2021 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Dec 23, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/147
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and device for encoding and a method and device for decoding a signal including encoded data representing an image sub-divided into blocks, and information representing a correction block and a residual block. For a current block of the image, a first pixel is encoded from a prediction value obtained for the first pixel from at least one pixel of a previously rebuilt block. The prediction is corrected using at least one value of a pixel of the correction block. At least one current pixel of the current block is encoded from a prediction value obtained for the current pixel from at least one previously corrected pixel of the current block. The prediction is corrected by using at least one value of a pixel of the correction block, delivering a prediction block for the current block. The residual block is computed from the current block and the predictive block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.