Motion filter for digital television system
US5237413A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1991 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Nov 19, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for processing fields of a video signal that are to be combined into a frame, compressed and communicated over a digital communications system. The processing technique increases the spatial correlation between pixels at a cost of slightly reduced resolution in areas of the frame where there is movement. The method employs a motion detector to separate moving and non-moving areas of the frame. A simple combination of lines from a first field and a second field can be used in static areas. In moving areas, a digital filter is applied to the fields to increase correlation in the resulting field. A digital compression technique such as vector quantization is applied to the resulting frame-based signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.