Method and apparatus for motion estimation for encoding sequential frames
US6687295B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2000 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Jan 6, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/53
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for motion estimation for encoding sequential frames is described. One embodiment of the invention provides efficiency by checking only four points surrounding a given point. Scores may be calculated corresponding to a level of difference between the given point in a reference frame and the points in a candidate frame. The efficiency may be further enhanced by storing scores of previously examined points for later use. The scores may be stored in a table. The table may be initialized to have invalid scores or scores corresponding to a great difference along search window boundaries to prevent searching outside of the search window boundaries. One embodiment of the invention implements a sliding window technique for efficient computation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.