Diagonal correction in composite video decoder
US4847683A · kind A · utility
8Cited by
2References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 2, 1988 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | May 2, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/646
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diagonal correction method of a composite video decoder for reducing cross color errors detects the presence of diagonal luminance information in a luminance signal recovered from an encoded video signal. The recovered luminance signal is filtered to produce a diagonal correction value which is added to the recovered luminance signal as well as to a corresponding recovered chrominance signal when the diagonal luminance information is detected. The resulting luminance and chrominance signals have enhanced contrast and reduced chrominance error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.