A method and apparatus for defeating copy protection signals in a video signal, and also for providing copy protection signals for a video signal, is disclosed. The defeat technique generally utilizes a particular pulse position shifting, modulation, etc., of AGC, normal sync and/or pseudo sync pulses...http://www.google.com/patents/US20050117749?utm_source=gb-gplus-sharePatent US20050117749 - Method and apparatus to synthesize and defeat video copy protection signals
