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    • 5. 发明授权
    • Recording and reproducing apparatus with limited digital copying
    • 具有有限数字复制的录音和再现设备
    • US5185792A
    • 1993-02-09
    • US762986
    • 1991-09-20
    • Hiromichi Shimada
    • Hiromichi Shimada
    • G11B5/86G11B20/00G11B27/032G11B27/30
    • G11B20/00753G11B20/00086G11B20/00768G11B27/032G11B27/3027G11B27/3063G11B5/86G11B2220/90G11B2220/913
    • A composite digital signal received by a recording and reproducing apparatus includes a digital information signal and a control signal. The control signal represents a number of digital copy generation of the associated information signal. The information signal of the received digital composite signal is recorded into recording medium. The information signal is reproduced from the recording medium. During the reproduction of the information signal, a new control signal is generated which represents a number equal to one plus the number represented by the control signal of the received composite digital signal. The new control signal and the reproduced information signal are combined into a new composite digital signal. The new composite digital signal is outputted. A check is made as to whether or not the number represented by the control signal of the received composite digital signal is equal to a predetermined number. When the number represented by the control signal of the received composite digital signal is equal to the predetermined number, the recording of the information signal of the received composite digital signal is inhibited.
    • 由记录和再现装置接收的复合数字信号包括数字信息信号和控制信号。 控制信号表示相关信息信号的数字拷贝产生的数目。 接收的数字复合信号的信息信号被记录在记录介质中。 从记录介质再现信息信号。 在再现信息信号期间,产生一个新的控制信号,它表示一个数字等于接收的复合数字信号的控制信号所表示的数目。 新的控制信号和再现的信息信号被组合成新的复合数字信号。 输出新的复合数字信号。 检查由接收的复合数字信号的控制信号表示的数字是否等于预定数量。 当由接收到的复合数字信号的控制信号表示的数目等于预定数量时,接收的复合数字信号的信息信号的记录被禁止。
    • 8. 发明授权
    • Digital recording and reproducing apparatus or digital recording
apparatus
    • 数字记录和再现设备或数字记录设备
    • US5130864A
    • 1992-07-14
    • US592536
    • 1990-10-03
    • Hiromichi Shimada
    • Hiromichi Shimada
    • G11B20/00G11B20/10
    • G11B20/00688G11B20/00086G11B20/10527
    • The invention includes an A/D converter, a digital input, decoder for demodulating a signal supplied to a digital input terminal to decode it into respective blocks of data, a digital copy control signal detecting portion for detecting a digital copy control signal from a channel status signal in an output signal of the digital input decoder, a digital copy permissibility decision portion for deciding whether digital copying is permissible or not, according to an output of the digital copy control signal detecting portion, a recording signal selecting portion for selecting one of an output signal of the A/D converter and an output signal of the digital input decoder and supplying the selected signal to a recording signal processing circuit, a first selection switch for selecting one of an output signal of a reproduced signal processing circuit and an output signal of the digital input decoder and supplying the selected signal to a D/A converter, and a second selection switch for selecting one of an output signal of the D/A converter and a signal supplied to an analog signal input terminal and supplying the selected signal to the A/D converter, whereby even in the digital recording mode, when the digital copying permissibility decision portion decides that digital copying is impermissible, the recording signal selecting portion selects an output signal of the A/D converter, the first selection switch selects an output signal of the digital input decoder, and the second selection switch selects the output signal of the D/A converter, so that a change is made from the digital recording mode to the analog recording mode, and thus a continuous recording is made.