Picture encoding method and picture encoding device
US8565307B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2005 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Feb 7, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For encoding of a picture whose macroblock is divided into parts of various sizes, a picture encoding method is provided to appropriately reduce a coding amount of a motion vector, without lowering coding efficiency. In order to reduce a processing amount and an increase of a coding amount, which result from generation of a large number of motion vectors due to bi-directional prediction selected for a small-sized part, a motion estimation unit selects the optimal prediction method from prediction method candidates decided by a prediction-method-candidate determination unit. Thereby, when motion compensation is performed for a large-sized part, forward-directional, backward-directional, and bi-directional prediction can be permitted. On the other hand when motion compensation is performed for a small-sized part, the bi-directional prediction is prohibited but the forward-directional or backward-directional prediction is permitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.