Inter prediction refinement based on bi-directional optical flow (BIO)
US10523964B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2018 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Mar 12, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video decoder can be configured to determine that a block of video data is encoded using a bi-directional inter prediction mode; determine that the block of video data is encoded using a bi-directional optical flow (BIO) process; inter predict the block of video data according to the bi-directional inter prediction mode; perform the BIO process for the block, wherein performing the BIO process for the block comprises determining a single motion vector refinement for a group of pixels in the block, wherein the group of pixels comprises at least two pixels; refine the group of pixels based on the single motion vector refinement; and output a BIO refined predictive block of video data comprising the refined group of pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.