Adaptive filter for use in color video signal processing
US4638351A · kind A · utility
11Cited by
10References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1983 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Sep 19, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/646
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A filter is disclosed for adaptively filtering a or NTSC luminance signal so as to attenuate the high frequency portion of the luminance band, wherein the chrominance information lies, when movement is detected. This reduces cross-color in the reproduced picture. Movement is detected by comparing the undelayed luminance signal with this signal delayed by an integral number of lines corresponding substantially to one field or one picture. The filter may precede a coder or follow a decoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.