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60 条记录 (耗时 0.041 秒)

    Recording and reproducing apparatus
    53.
    发明授权
    Recording and reproducing apparatus 失效
    记录和再现设备

    公开(公告)号：US5323244A

    公开(公告)日：1994-06-21

    申请号：US124748

    申请日：1993-09-22

    申请人： Susumu Yamaguchi ,  Chiyoko Matsumi

    发明人： Susumu Yamaguchi ,  Chiyoko Matsumi

    IPC分类号： G11B15/02 ,  G06F21/10 ,  G09C1/00 ,  G11B20/10 ,  H04N5/913 ,  H04N5/92 ,  H04N7/167 ,  H04N7/16

    CPC分类号： H04N5/913 ,  H04N5/9206 ,  H04N7/1675 ,  H04N2005/91364

    摘要： A recording and reproducing apparatus suitable for keeping the secrecy of video and audio signals recorded in, for example, a video tape recorder for private use to a high degree. A recording portion of the recording and reproducing apparatus is provided with an identification code input device, an operation designating device and an operation circuit. Further, a reproducing portion of the recording and reproducing apparatus is provided with an operation identification device and a comparator. When recording video and audio signals, a scramble pattern for scrambling the video and audio signals is generated from an input identification code to scramble the video and audio signals. Further, a predetermined operation is performed on the input identification code to produce a first ID signal representing a result of the operation. Then, the scrambled video and audio signals, the first ID signal and an operation identification signal indicating data designating the operation are recorded. When reproducing the video and audio signals, the predetermined operation designated by the operation identification signal is performed on an identification code input from the exterior of the apparatus. Then, a second ID signal representing a result of this operation is compared with the first ID signal reproduced by the reproducing portion. Subsequently, a descrambling is performed on the scrambled video and audio signals according to a result of the comparison.

    摘要翻译： 一种用于保持记录在例如用于私人使用的录像机中的视频和音频信号的保密性的记录和再现装置。 记录和再现装置的记录部分设置有识别码输入装置，操作指定装置和操作电路。 此外，记录和再现装置的再现部分设置有操作识别装置和比较器。 当记录视频和音频信号时，从输入的识别码产生用于加扰视频和音频信号的加扰模式以加扰视频和音频信号。 此外，对输入的识别码执行预定的操作，以产生表示操作结果的第一ID信号。 然后，记录加密的视频和音频信号，第一ID信号和指示指示操作的数据的操作识别信号。 当再现视频和音频信号时，由从设备的外部输入的识别码执行由操作识别信号指定的预定操作。 然后，将表示该操作的结果的第二ID信号与由再现部分再现的第一ID信号进行比较。 随后，根据比较的结果对加扰的视频和音频信号执行解扰。