Generalized bi-prediction for video coding with reduced coding complexity
US11153602B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2019 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Jan 23, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/573
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Exemplary embodiments include systems and methods for coding a video comprising a plurality of pictures including a current picture, a first reference picture, and a second reference picture, where each picture includes a plurality of blocks. In one method, for at least a current block in the current picture, a number of available bi-prediction weights is determined based at least in part on a temporal layer and/or a quantization parameter of the current picture. From among available bi-prediction weights a pair of weights are identified. Using the identified weights, the current block is then predicted as a weighted sum of a first reference block in the first reference picture and a second reference block in the second reference picture. Encoding techniques are also described for efficient searching and selection of a pair of bi-prediction weights to use for prediction of a block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.