Motion estimation method and apparatus for calculating a motion vector
US5619268A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1995 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Dec 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A motion estimation method and a motion estimation apparatus for calculating a motion vector to estimate a current picture partially forming a video sequence on the basis of first and second reference pictures partially forming the video sequence. In the method and apparatus, a reference block included in the first reference picture similar to a current block included in the current picture is specified and multiplied by a first coefficient. By performing a subtraction between the multiplied reference block and the current block, a template block indicative of a difference between the multiplied reference block and the current block is obtained. On the other hand, candidate blocks are calculated by multiplying, by a second coefficient, each reference blocks included in a search window partly forming the second reference picture. Based on the candidate blocks and template block are calculated distortion values each indicative of a difference between the following interpolated blocks and current block. Each of the interpolated blocks is indicative of a mean between the specified reference block of the first reference picture and each reference blocks of the search window.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.