Video signal receiver with record protection
US6122377A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Jan 12, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91321
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video signal receiver has a first output terminal, at which only a chroma, video, blanking, sync signal or a video, blanking, syncs signal with a chrominance signal is output. A second output terminal carries the RGB color signals and the associated sync signals. Video recorders normally evaluate only a video, blanking, sync signal with the corresponding chrominance information and can be connected to the first output terminal. Television displays normally evaluate RGB signals as well and can be connected to the second output terminal. The signal output at the first output terminal for the video recorder can be selectively blocked by a control device which is controlled by an identifier produced at the transmitter end. As a result, it is possible to display an encrypted transmission on the television set, but not to record the transmission on the video recorder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.