Method and apparatus for encoding image, method and apparatus for decoding image, electronic device, and system
US11647196B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2019 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | May 24, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided are a method and apparatus for encoding a picture, a method and apparatus for decoding a picture, an electronic device, and a system. The method for encoding a picture includes: determining a prediction value of an encoded block, and calculating a prediction residual between the encoded block and the prediction value; performing a transformation on the prediction residual at least once to obtain transform data, and determining transform coefficients using the transform data; determining a scanning mode of the transform coefficients and a size of the coefficient group of the transform coefficients, dividing the transform coefficients into at least one coefficient group, scanning transform coefficients comprised in each of the at least one coefficient group according to the scanning mode, and converting the transform coefficients into at least one syntax element; and encoding the size of the coefficient group and a value of the at least one syntax element, and writing encoded bits to a code stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.