Optimum motion vector determinator and video coding apparatus using the same
US6348954B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1999 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | Feb 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A motion vector candidate selector selects candidate motion vectors for a MB to be coded based on the allowable calculation amount supplied from a controller. A predictive motion vector determinator determines an optimum predictive motion vector from among the candidate motion vectors. A statistical amount measuring unit determines the variance of motion vectors from among the motion vectors already determined. A search area determinator determines the size of the search area based on the allowable calculation amount. Also, a predictive motion vector periphery searcher determines the shape of the search area from the variance of the motion vectors, sets the size of the shape to the value determined by the search area determinator, and with the optimum predictive motion vector as an origin, searches the search area. An optimum motion vector is determined from among the motion vectors thus searched. The above-described configuration can provide a video coding apparatus capable of detecting an optimum motion vector with high accuracy with a small calculation amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.