Methods and apparatuses for prediction refinement with optical flow
US12425603B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2024 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Jun 27, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/577
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for encoding a video signal. A method may include obtain a first reference picture and a second reference picture associated with a video block, wherein the first reference picture is before a current picture and the second reference picture is after the current picture in display order; obtain first prediction samples of the video block from the first reference picture; obtain second prediction samples of the video block from the second reference picture; obtain padded prediction samples; obtain horizontal and vertical gradient values of the first prediction samples and the second prediction samples based on the padded prediction samples; obtain motion refinements for samples in the video block based on the horizontal and vertical gradient values; and obtain bi-prediction samples of the video block based on the motion refinements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.