Method and apparatus for encoding and decoding a video signal using feature point based motion estimation
US5668600A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1996 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | Oct 28, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus, for use in an image signal encoding system, encodes a bidirectionally predictive frame (B frame) of a digital video signal to generate an encoded B frame signal. The apparatus selects two groups of pixels from pixels contained in a detected processing regions of a first and a second reference frames as a first and a second sets of feature points, respectively, by using a feature points selection circuit; and then determines a first set of motion vectors between the current and the first reference frames and a second set of motion vectors between the current and the second reference frames through the use of a feature point motion estimation circuit. Thereafter, the apparatus selects a set of motion vectors for the set of feature points from the first and the second sets of motion vectors to thereby generate a selected set of motion vectors and selection information representing the selected set as the encoded B frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.