Image encoding/decoding method and device for performing prof, and method for transmitting bitstream
US11949874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2023 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Jan 17, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method may comprise deriving a prediction sample of a current block based on motion information of the current block, determining whether prediction refinement with optical flow (PROF) applies to the current block, deriving, based on that the PROF applies to the current block, a difference motion vector for each sample position in the current block, deriving a gradient for each sample position in the current block, deriving a PROF offset based on the difference motion vector and the gradient, and deriving a refined prediction sample for the current block based on the PROF offset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.