Deriving motion vector information at a video decoder
US10701366B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2018 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Jul 19, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/583
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An example device for decoding video data includes a memory configured to store video data, and a video decoder implemented in circuitry and configured to determine that motion information of a current block of the video data is to be derived using decoder-side motion vector derivation (DMVD), determine a pixels clue for the current block, the pixels clue comprising pixel data obtained from one or more groups of previously decoded pixels, derive the motion information for the current block according to DMVD from the pixels clue, and decode the current block using the motion information. The video decoder may generate the pixels clue using multiple hypothesis predictions from multiple motion compensated blocks. The video decoder may determine an inter-prediction direction for the motion information according to matching costs between different prediction directions. The video decoder may refine the motion information using a calculated matching cost for the pixels clue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.