Method and apparatus to synthesize and defeat video copy protection signals

Disclosed is a method for eliminating the copy protection signal in video signal, is further used to provide copy signal protection method and device of video signal. For an usual a specific filtering circuit, a normal and/or synchronization pulse plate, modular layer synchropulse equal is connected to the gap between pulses. Content to the embodiment are disclosed is a synchronous selecting/locating synchronous layer or a FILTERING pulse opposite position and adjusting the synchronous/layer and/or synchronization the AGC pulse position and stricts to the synchronous/layer and/or synchronization the AGC pulse, which are for/pseudo synchronous and FILTERING pulses claims a position of gap between synchronization of the.