ADC system, video decoder and related method for decoding composite video signal utilizing clock synchronized to subcarrier of composite video signal
US7486336B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2005 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Apr 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/52
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An analog-to-digital converting system for converting a composite video signal into a digital signal according to a synchronized clock. The analog-to-digital converting system includes an analog-to-digital converter (ADC), a color burst phase estimator and a phase-locked loop (PLL). The ADC converts the composite video signal to the digital signal according to the synchronized clock, wherein the synchronized clock is synchronized to a frequency of a color burst of a chrominance signal of the composite video signal. The color burst phase estimator, coupled to the ADC, estimates the phase of the color burst carried on the composite video signal. The PLL, coupled to the color burst phase estimator, generates the synchronized clock according to the phase of the color burst estimated by the color burst phase estimator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.