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    Apparatus for, and method of, recording scrambled or coded television signals
    1.
    发明公开
    Apparatus for, and method of, recording scrambled or coded television signals 失效
    设备和方法，用于加扰或编码电视信号的记录。

    公开(公告)号：EP0120615A1

    公开(公告)日：1984-10-03

    申请号：EP84301293.1

    申请日：1984-02-28

    申请人： SONY CORPORATION

    发明人： Tomioka, Masao ,  Okada, Takashi ,  Mogi, Takao

    IPC分类号： H04N7/16 ,  G11B15/02

    CPC分类号： H04N21/4408 ,  G11B15/02 ,  G11B15/023 ,  G11B31/006 ,  H04N5/782 ,  H04N5/913 ,  H04N7/0887 ,  H04N7/0888 ,  H04N7/167 ,  H04N7/1675 ,  H04N19/142 ,  H04N19/179 ,  H04N19/87 ,  H04N2005/91364

    摘要： A scrambled television program is received and recorded in a scrambled fashion automatically in a video tape recorder by detecting program code signals placed in vertical blanking intervals of ten fields preceding the commencement of the scrambled program signal and upon sensing such program code signals the video tape recorder is activated to record the scrambled television program. A stop code signal is arranged following the coded television program and is detected for stopping operation of the video recorder, so that the scrambled program is recorded without requiring the manual setting of automatic timers orthe like. In addition to the program code, a key code, and scene change signals are transmitted an these are used to produce a descramble pattern to descramble the television program when it is reproduced by the video tape recorder. By placing the key code after the television program, the entire program must be recorded in scrambled form before it can be reproduced and descrambled for viewing, thereby automatically recording the scrambled program without requiring a timer.