Method for the additive and multiplicative spurious signal compensation
US4240103A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1979 |
| Grant date | Dec 16, 1980 |
| Priority date | — |
| Expiry date | Sep 17, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/81
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and a circuit for the additive and multiplicative spurious signal compensation of a video signal are proposed. For additive spurious signal compensation, a signal is derived from the "black level" signal, stored, read-out in synchronism with the video signal to be corrected and the thus formed correction signal is subtracted from the video signal. For multiplicative spurious signal compensation, a signal is derived from the "white level" signal, its reciprocal value is formed, stored, read-out in synchronism with the video signal to be corrected and the thus formed correction signal is multiplied with the video signal. A three channel system for color television signals is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.