Motion vector detector and video coder
US6040864A · kind A · utility
27Cited by
11References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1997 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Jun 9, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
By a motion vector correction circuit 313, a motion vector minimizing the sum of a value of the quadratic error function having a motion vector as a variable and the motion vector changing amount in neighboring blocks is determined, and it is linearly interpolated by a motion vector interpolation circuit 314 to obtain a motion vector in a pixel unit, and a motion compensated picture is generated, and a differential picture of the current frame and this motion compensated picture is divided into sub-bands by a video transform circuit 304, and only the information in the region of the large differential signal energy is coded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.