| 摘要 |
PURPOSE:To provide the copy guard system and the copy guarding system having the high degree of privacy at a video theater system using a VTR. CONSTITUTION:At the video theater system composed of a telecine device 2 to execute the photoelectric conversion of a movie film and to execute color correction, VTR unit 3 to prepare a master tape from the telecine device 2, VTR unit 6 to execute dubbing from the master tape to a tape 7 for distribution, VTR 8 to reproduce the tape 7 for distribution, controller unit 8 and projector, the copy guard system execute a copy guard processing between the VTR for reproduction from the time point of dubbing from the master tape 4 to the tape 7 for distribution and as the copy guard processing method, the copy guarding system scrambles pictures with scan line transition or polarity inversion while maintaining synchronizing signals. |
