Method for encoding/decoding a picture block
US10547855B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2016 |
| Grant date | Jan 28, 2020 |
| Priority date | — |
| Expiry date | May 14, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/98
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and device for encoding or decoding a picture block having a luminance component. The method includes obtaining a luminance residual block (Lr) by subtracting a first representation (Ll, LlD) of an average value of the luminance component calculated from the luminance component, obtaining a second representation (ƒ(Ll), ƒ(Ll)D) of the average value by applying a transfer function to the average value (Ll) of the luminance component in order to reduce the dynamic range of the average value and encoding a luminance block (Le) obtained by adding (105, 302) together the luminance residual block (Lr) and the second representation (ƒ(Ll), ƒ(Ll)D) of the average value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.