| 摘要 |
PURPOSE:To record a video signal with scrambling and to apply descramble at the reproduction system by using the video signal being the result of multiplexing by a multiplexing means for a picture information part delayed by a delay means and a synchronizing signal part extracted by a separator means. CONSTITUTION:A color video signal coming to an input terminal 15 is subject to horizontal synchronizing signal separation by a horizontal synchronizing signal separator circuit 21 via a clamp circuit 16, switch circuits 17, 18 and the result is fed respectively to a monostable multivibrator 22 and a field discrimination circuit 23. The picture part of the video signal from the switch 18 and fed to delay circuits 251-257 being 7 stages of cascade connection. The output signal of the switch 20 (picture information part) is fed to an adder 30 via the switch circuit 28 and multiplexed onto a signal comprising a color burst signal from a delay line 24 and a horizontal synchronizing signal and the result is outputted via an output terminal 31. |
