Method and device for encoding at least one image unit, and method and device for decoding a stream representative of at least one image unit
US10567761B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2017 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Jan 6, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/182
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for encoding at least one image unit is disclosed. The method includes encoding at least one image unit, reconstructing the at least one image unit into a reconstructed image unit and applying an offset filter to the at least one reconstructed image unit. Applying the offset filter to the at least one reconstructed image unit includes determining at least one current category in a set of categories for at least one pixel of the reconstructed image unit, encoding an offset value for at least one category of the set of categories, applying a pre-filter to the at least one pixel of the reconstructed image unit assigned to the category only in the case where the current category is equal to the category having an encoded offset value and adding the encoded offset value to the at least one pixel of the reconstructed image unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.