Methods and apparatuses for prediction refinement with optical flow, bi-directional optical flow, and decoder-side motion vector refinement
US12069297B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2022 |
| Grant date | Aug 20, 2024 |
| Priority date | — |
| Expiry date | Jul 27, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A bit-depth representation method, apparatus, and a non-transitory computer-readable storage medium are provided. A decoder obtains a reference picture I associated with a video block within the video signal. The decoder obtains prediction samples of the video block from a reference block in the reference picture I. The decoder controls internal PROF parameters of a PROF derivation process by applying right-shifting to the internal PROF parameters based on a bit-shift value to achieve a preset precision. The decoder obtains prediction refinement values for samples in the video block based on the PROF derivation process being applied to the video block based on the prediction samples. The decoder obtains prediction samples of the video block based on the combination of the prediction samples and the prediction refinement values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.