Anti-piracy video tape system has anti-piracy components added to the luminance signal and the color difference signals
US5243411A · kind A · utility
59Cited by
4References
6Claims
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Key dates
| Filing date | Jun 2, 1992 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Jun 2, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/1696
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An anti-piracy signal generating circuit for generating anti-piracy signal components on a video signal reproduced by a first video unit, the signal components being interleaved to a frequency f.sub.H in the band of the video signal in accordance with the video signal components and a signal superimposing circuit for superimposing the anti-piracy signal components intermittenly on the luminance signal, first color difference signal, and second color difference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.