Video disc player having vertical timing signal generator
US4409626A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1981 |
| Grant date | Oct 11, 1983 |
| Priority date | — |
| Expiry date | Oct 6, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/932
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A signal source continuously produces a horizontal timing signal proportional to the line rate of a recovered composite video signal. A vertical timing unit coupled to the source continuously produces a vertical timing signal proportional to the field rate of the video signal. An error detector processes data words present in the vertical interval of the composite video signal to provide a data status signal indicative of the validity of each processed data word. The data status signal is applied to the vertical timing unit for synchronizing the vertical timing signal with the vertical synchronizing component of the composite video signal and rendering the vertical timing signal substantially immune to noise which might accompany the composite video signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.