Method and apparatus for recovering video color subcarrier signal
US6380980B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1997 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Aug 25, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/45
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An embodiment of the present invention provides a signal generator for generating a signal with a predetermined frequency. The signal generator includes a first comparator for generating a first error signal and a second comparator for generating a second error signal. The first and second comparators are coupled to an oscillator configured to receive the first and second error signals and generate the signal having a predetermined frequency. Another embodiment of the present invention provides a signal generator for generating a signal with a predetermined frequency. The signal generator includes a counter for generating a first count, Q_last. The counter is coupled to a ratio counter which generates a signal having a value less than or equal to Q_last. The contents of the ratio counter represent the phase of the signal having a predetermined frequency. The ratio counter outputs the signal having a predetermined frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.