Adaptive motion estimator
US7551673B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1999 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | May 13, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus of encoding digital video according to the ISO/IEC MPEG standards (ISO/IEC 11172-2 MPEG-1 and ISO/IEC 13818-2 MPEG-2) using an adaptive motion estimator. A plurality of global motion vectors are derived from the motion vectors of a previous picture in a sequence, and the global motion vectors are analyzed to determine motion characteristics. The video encoding is arranged to enable switching among different types of local motion estimators based on the motion characteristics of the moving pictures sequence. This gives rise to a motion estimation algorithm that can adaptively change its search range, search area and block matching scheme to suit different types of moving sequences.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.