Device, method and digital video encoder for block-matching motion estimation
US6842483B1 · kind B1 · utility
111Cited by
29References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 11, 2000 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Aug 15, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/557
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device or method for video compression uses a technique in which changes in the image are encoded by motions of block of the image and signals indicating evolutions in the block. To determine the motions of the blocks of a each frame, a search is performed for a similar block of a previous frame based on points of the previous frame which are arranged in successive diamond shaped zones. The diamond shaped zones may be centred on the position of the block in previous frame, or one or more predicted motions of the block. The method terminates according to criteria defined using thresholds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.