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    • 8. 发明授权
    • Signal reproducing/recording/transmitting method and apparatus and signal recording medium
    • 信号再现/记录/发送方法和装置以及信号记录介质
    • US06256392B1
    • 2001-07-03
    • US09480719
    • 2000-01-07
    • Yoichiro SakoShigeyuki Yoneyama
    • Yoichiro SakoShigeyuki Yoneyama
    • G06F1214
    • G11B20/0021G11B20/00086G11B20/00333G11B20/00768H04N5/913H04N2005/91314H04N2005/91328H04N2005/91364
    • A signal reproducing apparatus for prohibiting copying or unauthorized use. The apparatus includes a copying management information decision circuit 19 for discriminating the state of the copying management information read out from each header of a data sector and within the TOC, a protect signal generating circuit 20 for generating a protect signal based on the discrimination signal and a mixing circuit 24 for mixing a protect signal in a vertical blanking period of an analog video signal D/A converted from digital video data reproduced from an optical disc D. The apparatus also includes a descrambling circuit 31 for descrambling the digital data based on the copying management information and a scrambling circuit 32 for descrambling the digital data. The apparatus enables prohibition of unauthorized analog copying and digital copying inhibition of serial generational copying and prohibition of unauthorized analog and digital copying simultaneously.
    • 一种用于禁止复制或未授权使用的信号再现装置。 该装置包括:复制管理信息判定电路19,用于鉴别从数据扇区的每个头部和TOC内的每个头部读出的复制管理信息的状态;保护信号发生电路20,用于基于鉴别信号产生保护信号, 混合电路24,用于在从由光盘D再现的数字视频数据转换的模拟视频信号D / A的垂直消隐期中混合保护信号。该装置还包括解扰电路31,用于根据 复制管理信息和用于解扰数字数据的加扰电路32。 该装置允许同时禁止未经授权的模拟复制和数字复制禁止串行代码复制和禁止未授权的模拟和数字复制。