Video signal digital slicing circuit
US5136382A · kind A · utility
15Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1990 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Oct 2, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0355
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An extractor for digital data transmitted at a first determined frequency (f0) through a video channel after a burst of 0s and 1s emitted at a first frequency (f0). A comparator (1) compares the input signal with a threshold level. A threshold level is provided by an up/down counter (12) operating at a frequency (F0) multiple of the first frequency, the up/down counting input of which is connected to the output of the comparator (1), and a digital/analog converter (16) receiving the output of the up/down counter and supplying the threshold level (V.sub.T).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.