Drop-out correction circuit in an apparatus for correcting time base error with inhibition of time-base information during dropout
US4805040A · kind A · utility
14Cited by
21References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1987 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Jul 21, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/956
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Time base fluctuation of a video signal reproduced from a video disc or tape is detected and corrected. Meanwhile, a dropout of such reproduced video signal is also detected. The dropout detection signal thus obtained represents the dropout period during which the time base information is erroneous. Therefore the time base information detected during such dropout period is rendered invalid to consequently eliminate erroneous correction of the time base fluctuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.