Method of protecting high definition video signal
US6925181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2003 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Aug 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/2347
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system controls reproduction of a video transmission between a transmitter and a receiver. The system includes an encryptor with an offset generator adapted to receive the encrypted frame key and to generate a sequence of pseudo-random values for the color component; and an adder coupled to the offset generator and to the color component signal for providing an encoded color component signal. The system also includes a decryptor with a decryptor offset generator adapted to receive the encrypted frame key and to generate a decryptor pseudo-random value for the color component; and a subtractor coupled to the offset generator and to the color component signal for subtracting the offset signal from the color component signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.