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16 条记录 (耗时 0.011 秒)

    Magnetic recording and reproducing control apparatus
    1.
    发明公开
    Magnetic recording and reproducing control apparatus 失效
    磁记录和重放控制装置

    公开(公告)号：EP0814619A3

    公开(公告)日：1999-05-12

    申请号：EP97109678.9

    申请日：1997-06-13

    申请人： HITACHI, LTD.

    发明人： Hatanaka, Yuji ,  Ohara, Yasunori ,  Tachibana, Hiroaki ,  Yamada, Yoshio ,  Amada, Nobutaka ,  Okamoto, Hiroo

    IPC分类号： H04N9/82

    CPC分类号： H04N21/4147 ,  H04N5/9262 ,  H04N21/236 ,  H04N21/434

    摘要： A magnetic recording and reproducing apparatus includes an input circuit (2, 9) for inputting the digital signal, an identification information addition circuit (16, 27) for adding recording identification information indicative of recording identification for the digital signal input through the input circuit, a recording circuit (17) for recoding the digital signal with the recording identification information on the recoding medium, a reproducing circuit (20, 21) for reproducing the content of the recording medium, an identification information detecting portion (22) for detecting the identification information from a reproduced signal (91) reproduced by the reproducing circuit for ouputting an identification information detection signal (114) indicative of detection of the identification information, a storage circuit (23) for storing the reproduced signal, a time stamp detection circuit (82) for detecting the time stamp from the reproduced signal stored in the storage circuit, an output control circuit (26) for generating a timing for reading the reproduced signal from the storage circuit on the basis of the time stamp detected by the time stamp detection circuit, a reset circuit (27) for resetting the output control circuit in response to at least the identification information detection signal, and an output circuit (21) for outputting the reproduced signal read from the storage circuit, the identification information addition circuit adding the recording identification information to the digital signal for a given period where the recording circuit initiating recording on the recording medium, and the reset circuit resetting the at least the control circuit upon detection of the recording identification information from the identification information detecting circuit.

    Method and system for transsion/reception of encrypted digital signal
    3.
    发明公开
    Method and system for transsion/reception of encrypted digital signal 失效
    用于发送/接收加密的数字信号的方法和装置。

    公开(公告)号：EP0675655A3

    公开(公告)日：1997-09-24

    申请号：EP95104480.9

    申请日：1995-03-27

    申请人： HITACHI, LTD.

    发明人： Amada, Nobutaka ,  Yamazaki, Shigeru ,  Noguchi, Takaharu ,  Nishijima,Hideo ,  Ono, Hiroaki ,  Okamoto, Hiroo ,  Owashi, Hitoaki ,  Arai, Takao ,  Hatanaka, Yuji ,  Saito, Seiichi

    IPC分类号： H04N7/52

    CPC分类号： H04N7/52 ,  H04N5/9261 ,  H04N5/937

    摘要： A digital information signal transmitting/receiving method and system having a transmitter (100) for transmitting an encrypted digital information signal and a plurality of receivers (200) for receiving the encrypted digital information signal from the transmitter (100). The transmitter (100) simultaneously distributes a plurality of identification codes associated with the receivers (200) ahead of the digital information signal. Then, the digital information signal is distributed to the receivers. The receivers (200) detect particular, or their own, identification codes from the plurality of identification signals assigned to the receivers (200). The received encrypted digital information signal is decrypted into the original information on the basis of the particular identification codes associated with the corresponding receivers or the recorders (300). Either the receivers (200) or the recorders (300) generate an information request signal. The transmitter (100) is responsive to this information request signal to add to the digital information signal identification signals for identifying the receivers (200) or the recorders (300) which generated the information request signal. The recorders (300) control the received information signal to be recorded in response to the identification signals received by the receivers (200).

    PCM signal reproducing/recording apparatus
    4.
    发明公开
    PCM signal reproducing/recording apparatus 失效
    Gerätzur Aufnahme / Wiedergabe von PCM-Signalen。

    公开(公告)号：EP0303230A2

    公开(公告)日：1989-02-15

    申请号：EP88112939.9

    申请日：1988-08-09

    申请人： HITACHI, LTD. ,  PIONEER ELECTRONIC CORPORATION

    发明人： Hatanaka, Yuji ,  Okamoto, Hiroo ,  Arai, Takao ,  Wakumura, Shin-ichi ,  Miyake, Ichiro ,  Sakamoto, Shunichiro

    IPC分类号： G11B20/10 ,  G11B5/86 ,  G11B20/18

    CPC分类号： G11B27/3063 ,  G11B20/10527 ,  G11B27/032 ,  G11B27/3027 ,  G11B2220/90 ,  G11B2220/913

    摘要： Disclosed is a PCM signal reproducing/recording apparatus which comprises a reproducing device (500) for reproducing a recording medium (11) carrying PCM data and sub-code data recorded thereon, the sub-code data having sub-data and sub-ID for adding auxiliary information to the PCM data, and a recording device (1500) for recording the PCM data and sub-code data transmitted from the reproducing device onto a recording medium (221). The recording device is arranged to selectively record the sub-code data judged to be correct, onto a recording medium, of those sub-code data transmitted from the reproducing device.

    摘要翻译： 公开了一种PCM信号再现/记录装置，其包括用于再现携带PCM数据和记录在其上的子代码数据的记录介质（11）的再现装置（500），具有子数据和子ID的子代码数据 向PCM数据添加辅助信息，以及用于将从再现装置发送的PCM数据和子代码数据记录到记录介质（221）上的记录装置（1500）。 记录装置被配置为将从判定为正确的子代码数据选择性地记录到从再现装置发送的那些子代码数据到记录介质上。