Method and apparatus for digitally processing gamma pedestal and gain
US5132796A · kind A · utility
15Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1990 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Sep 4, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/202
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for gamma-correcting digital video data and for adjusting the video signal to a desired pedestal (black) level, gain (white) level, and a gamma correction value includes an apparatus for calculating digital values corresponding to a video signal having the desired gamma correction, black level and white level and a memory for storing the digital values. Uncorrected input digital video signals address the memory and cause the corresponding digital values stored in the memory, which represent the corrected video signal, to be output. The invention can be implemented in both software or hardware.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.