Incremental transform set construction and transform signaling for video coding
US12267496B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2023 |
| Grant date | Apr 1, 2025 |
| Priority date | — |
| Expiry date | Aug 13, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Video coders and decoders perform transform coding and decoding on blocks of video content according to an adaptively selected transform type. The transform types are organized into a hierarchy of transform sets where each transform set includes a respective number of transforms and each higher-level transform set includes the transforms of each lower-level transform set within the hierarchy. The video coders and video decoders may exchange signaling that establishes a transform set context from which a transform set that was selected for coding given block(s) may be identified. The video coders and video decoders may exchange signaling that establishes a transform decoding context from which a transform that was selected from the identified transform set to be used for decoding the transform unit. The block(s) may be coded and decoded by the selected transform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.