Highly adjustable video composite sync separator and variable gain pixel clock frequency locking apparatus and method
US6507370B1 · kind B1 · utility
2Cited by
18References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 20, 2000 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Mar 20, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/126
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for extracting vertical (V-SYNC) and horizontal (H-Blank) sync signals from a digital composite sync signal (C-SYNC) of a master video source for use in controlling a second video source, which allows for an adjustable delay relationship between the C-SYNC from the master source and the generated H-Blank. The present invention also provides a system and method for varying the responsiveness or gain of the genlocking circuit used to synchronize the system pixel clock frequency of the second video source to that of the master video signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.