Pools of transforms for local selection of a set of transforms in video coding
US11936863B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 31, 2018 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Aug 31, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/96
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for improving the performance of video encoders and decoders involves selecting a set of transforms from among a plurality of sets of transforms that can be used for coding blocks in a region of a video image. Within a region, selection of a particular transform from among a plurality of transforms comprising the selected set of transforms is used to encoder or decode at least one block in the region. Associated indices representing the set of transforms to be used within a region and the selected transform for a block can be sent in a bitstream. In an alternate embodiment, a default set of transforms is complemented by selection of an additional set of transforms on a block or region basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.