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    DISK DEVICE.
    1.
    发明公开
    DISK DEVICE. 失效
    PLATTENVORRICHTUNG。

    公开(公告)号：EP0652548A4

    公开(公告)日：1999-04-21

    申请号：EP94914628

    申请日：1994-05-17

    Applicant: SONY CORP

    Inventor： TANAKA SHOJI ,  TAKEDA TORU

    IPC: G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B27/30 ,  G11B5/09

    CPC classification number: G11B27/3027 ,  G11B20/10 ,  G11B20/12 ,  G11B20/1403 ,  G11B2220/20

    Abstract: Clock marks for extracting clock components are made in advance at regular intervals along the track of a discoid recording medium, and clock components are extracted by detecting these clock marks at the time of rotating the discoid recording medium. Since the clock components are extracted from the definitely and periodically arranged clock marks in such a way, and interpolating clocks in sections between clock marks are generated based on the extracted clock components, highly accurate clocks can be obtained as compared with the case where clocks are extracted from reproduced codes. Therefore, the capacity of the discoid recording medium can be remarkably increased.

    Abstract translation: 用于提取时钟分量的时钟标记预先沿着盘状记录介质的轨道以规则的间隔进行，并且在旋转盘状记录介质时检测这些时钟标记来提取时钟分量。 由于以这种方式从明确且周期性排列的时钟标记中提取时钟分量，并且基于所提取的时钟分量来生成在时钟标记之间的部分内插时钟，与时钟是相同的情况相比，可以获得高度准确的时钟 从转载代码中提取。 因此，可以显着提高盘状记录介质的容量。

    2.
    发明专利
    未知

    公开(公告)号：DE69426226D1

    公开(公告)日：2000-12-07

    申请号：DE69426226

    申请日：1994-05-17

    Applicant: SONY CORP

    Inventor： TANAKA SHOJI ,  TAKEDA TORU

    IPC: G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B27/30 ,  G11B5/09

    Abstract: Clock marks for extracting clock components are made in advance at regular intervals along the track of a discoid recording medium, and clock components are extracted by detecting these clock marks at the time of rotating the discoid recording medium. Since the clock components are extracted from the definitely and periodically arranged clock marks in such a way, and interpolating clocks in sections between clock marks are generated based on the extracted clock components, highly accurate clocks can be obtained as compared with the case where clocks are extracted from reproduced codes. Therefore, the capacity of the discoid recording medium can be remarkably increased.

    3.
    发明专利
    未知

    公开(公告)号：FR2617627A1

    公开(公告)日：1989-01-06

    申请号：FR8808974

    申请日：1988-07-01

    Applicant: SONY CORP

    Inventor： KUTARAGI KEN ,  TANAKA SHOJI ,  YASUSH

    IPC: G11B5/012 ,  G11B5/48 ,  G11B7/007 ,  G11B11/105 ,  G11B19/02 ,  G11B19/04 ,  G11B20/12 ,  G11B20/18 ,  G11B27/13 ,  G11B27/30 ,  G11B5/74 ,  G11B25/04

    Abstract: A record disk has a read-only track area and a writable track area in which a guard band of a sufficient width is formed between such two areas for prevention of erroneous writing into the read-only track area during data writing into the writable track area. Apparatus using such disk employs a pair of heads with opposite azimuth angles and erasing of a track is first checked to prevent a read-only track from being erased. During such track erasing, a track recorded by a head with one azimuth is erased by a head with the other azimuth.

    7.
    发明专利
    未知

    公开(公告)号：DE69426226T2

    公开(公告)日：2001-04-05

    申请号：DE69426226

    申请日：1994-05-17

    Applicant: SONY CORP

    Inventor： TANAKA SHOJI ,  TAKEDA TORU

    IPC: G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B27/30 ,  G11B5/09

    Abstract: Clock marks for extracting clock components are made in advance at regular intervals along the track of a discoid recording medium, and clock components are extracted by detecting these clock marks at the time of rotating the discoid recording medium. Since the clock components are extracted from the definitely and periodically arranged clock marks in such a way, and interpolating clocks in sections between clock marks are generated based on the extracted clock components, highly accurate clocks can be obtained as compared with the case where clocks are extracted from reproduced codes. Therefore, the capacity of the discoid recording medium can be remarkably increased.

    Recording discs
    8.
    发明专利
    Recording discs 未知

    公开(公告)号：SG50334G

    公开(公告)日：1995-09-18

    申请号：SG1995903746

    申请日：1988-07-01

    Applicant: SONY CORP

    Inventor： KUTARAGI KEN ,  TANAKA SHOJI ,  FUJINAMI YASUSHI

    IPC: G11B5/012 ,  G11B5/48 ,  G11B7/007 ,  G11B11/105 ,  G11B19/02 ,  G11B19/04 ,  G11B20/12 ,  G11B20/18 ,  G11B27/13 ,  G11B27/30

    Abstract: A record disk has a read-only track area and a writable track area in which a guard band of a sufficient width is formed between such two areas for prevention of erroneous writing into the read-only track area during data writing into the writable track area. Apparatus using such disk employs a pair of heads with opposite azimuth angles and erasing of a track is first checked to prevent a read-only track from being erased. During such track erasing, a track recorded by a head with one azimuth is erased by a head with the other azimuth.

    9.
    发明专利
    未知

    公开(公告)号：DE3822388A1

    公开(公告)日：1989-02-02

    申请号：DE3822388

    申请日：1988-07-01

    Applicant: SONY CORP

    Inventor： KUTARAGI KEN ,  TANAKA SHOJI ,  FUJINAMI YASUSHI

    IPC: G11B5/012 ,  G11B5/48 ,  G11B7/007 ,  G11B11/105 ,  G11B19/02 ,  G11B19/04 ,  G11B20/12 ,  G11B20/18 ,  G11B27/13 ,  G11B27/30

    Abstract: A record disk has a read-only track area and a writable track area in which a guard band of a sufficient width is formed between such two areas for prevention of erroneous writing into the read-only track area during data writing into the writable track area. Apparatus using such disk employs a pair of heads with opposite azimuth angles and erasing of a track is first checked to prevent a read-only track from being erased. During such track erasing, a track recorded by a head with one azimuth is erased by a head with the other azimuth.

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