Image decoding device, image encoding device, image processing system, and program
US11438625B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2019 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Aug 29, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/533
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image decoding device includes a prediction unit configured to generate a prediction signal included in a prediction block based on a motion vector. The prediction unit is configured to perform refinement processing of setting a search range based on a reference position specified by the motion vector, specifying a corrected reference position having the smallest predetermined cost from the search range, and correcting the motion vector based on the corrected reference position. When a block size of the prediction block is larger than a predetermined block size, the prediction unit is configured to divide the prediction block into sub-block groups and perform the refinement processing for each sub-block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.