| 摘要 |
PURPOSE:To maintain the security of an entire video theater system and to control the video theater by applying an image scramble processing method of high secrecy in the system in order to prevent the illicit use of a supply tape. CONSTITUTION:A telecinema device 2 is provided to apply the photoelectric transformation to a movie film 1 together with a master VTR 5 which produces a master tape 4 from the device 2, and a dubbing VTR 6. Then a scrambler 12 is provided between the VTR 5 and the VTR 6 to perform the scramble processing. At the same time, a scramble key is transferred to a theater via an IC card 14 or a MODEM 17 and reproduced by a reproducing VTR 8. Then the scramble key is restored by a descrambler 15. |
