Video signal control system
US4597006A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1983 |
| Grant date | Jun 24, 1986 |
| Priority date | — |
| Expiry date | May 18, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/64
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video signal control system including circuitry for providing a plurality of independent color video signals, control circuitry for separately varying the magnitude of each of the independent color video signals, circuitry for combining the controlled independent color video signals to provide change-in-red, change-in-blue, and change-in-green, and change-in-luminance correction signals, and second combining circuitry for adding together the correction signals with conventional video signals to provide corrected video signals. The system thereby provides independent control over portions of a video scene which are predominantly the color of the independent color channel, without affecting spectral content, neutral tones, and color mixtures. The present invention also includes an improved apparatus for controlling parameters requiring repetitive adjustments, including operator signal means responsive to provide control signals indicative of a desired increase or decrease in the controlled parameter. Circuitry responsive to the control signals accumulating the net increase or decrease in the controlled parameter in a memory location associated with the particular controlled paramet…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.