Video encoding device using predicted motion vector for blocks of different size
US9521417B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2012 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | May 22, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image encoding device that appropriately estimates a prediction vector by avoiding an uncoded macro block (MB) is disclosed. The device determines a start point of searching a motion vector for an encoding target region, from the prediction vector for the target region which is determined with motion vectors for surrounding blocks around the target region and in accordance with a predetermined rule, and starts searching for the motion vector from the search start point. If the size of the encoding target region cannot be acquired during calculation of the prediction vector, the device determines the size of the encoding target region, from the size of an encoded region other than the target region. If at least one of the motion vectors for the surrounding blocks cannot be acquired, the device calculates the prediction vector using alternatively a motion vector of an encoded block outside of the target region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.