Ghost signal eliminating system
US4053932A · kind A · utility
18Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1975 |
| Grant date | Oct 11, 1977 |
| Priority date | — |
| Expiry date | Dec 1, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/211
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A ghost signal eliminating system which eliminates a ghost by delaying a video signal through a variable delay line by the delay time of the ghost from the true image and subtracting the delayed video signal from the original video signal. The variable delay line comprises a fine adjusting circuit for fine-adjusting the delay time and a coarse adjusting circuit for coarse-adjusting the delay time, the coarse adjusting circuit being controlled by a detection voltage for a control voltage level and the fine adjusting circuit being controlled by a voltage which is the difference between the control voltage and the detection voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.