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    22.
    发明专利
    未知

    公开(公告)号：DE69706341T2

    公开(公告)日：2002-05-02

    申请号：DE69706341

    申请日：1997-02-28

    Applicant: SONY CORP

    Inventor： KOBAYASHI SHOEI ,  TAKEDA TORU ,  YAMAGAMI TAMOTSU

    IPC: G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B20/12 ,  G11B27/19 ,  G11B27/30

    Abstract: An information recording/reproducing apparatus wherein exact reproduction of both wobbled address information and sync information can be realized in a recording mode as well as in a reproduction mode. The apparatus comprises first and second detectors (61A, 61B) for detecting two diametrical side portions of each track (2) on a recording medium (1) where a pregroove is modulated correspondingly to address information and sync information of mutually different frequency bands; a calculator (48) for calculating a normalized track information signal on the basis of the outputs of the first (61A) and second detectors (61B); and a third detector (37) for detecting the address information and/or the sync signal on the basis of the output of the calculator (48).

    24.
    发明专利
    未知

    公开(公告)号：DE69422534D1

    公开(公告)日：2000-02-17

    申请号：DE69422534

    申请日：1994-02-09

    Applicant: SONY CORP

    Inventor： TAKEDA TORU ,  HAYASHI NOBUHIRO ,  YAMAMOTO NORIYUKI

    IPC: G11B20/10 ,  G11B5/012 ,  G11B5/48 ,  G11B5/596 ,  G11B19/02 ,  G11B19/04 ,  G11B20/12 ,  G11B20/18 ,  G11B21/00 ,  G11B21/10 ,  G11B27/30 ,  H03M13/23 ,  G11B21/08

    Abstract: The information storage disc has ID storage areas (41H) formed in predetermined locations in the radial direction of the disc, the ID storage areas storing either sector or track numbers (resp. 40,41) previously and magnetically. In this setup, if the read head (30) is dislodged from the center line of a given track (10), the read head still reads the sector number correctly. The information recording and reproducing apparatus has the read head (30) and the write head (31) arranged so that they are positioned on a given intermediate track in a substantially aligned manner. With the write head positioned on a given track, the read head is dislodged from that track only by a negligible distance. This allows the read head to read sector and track numbers unfailingly from the disc.

    Pattern data generators
    25.
    发明专利
    Pattern data generators 未知

    公开(公告)号：GB2274537B

    公开(公告)日：1996-09-18

    申请号：GB9326088

    申请日：1993-12-21

    Applicant: SONY CORP

    Inventor： ISHIDA TAKEHISA ,  TAKEDA TORU

    IPC: G11B5/84 ,  G11B5/596 ,  G11B5/82 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/26 ,  G11B11/10 ,  G11B11/105 ,  G11B20/12 ,  G11B23/00 ,  G11B5/012 ,  G11B7/007

    Abstract: A data pattern generator generates pattern data corresponding to a pre-formatted data pattern and supplies the pattern data to a disc-like recording medium producing apparatus for forming the pre-formatted data pattern, such as clock information, servo information and read-out information in a disc-like recording medium. The data pattern generator includes a first memory unit for storing therein as a data array at least part of a data pattern formed on a disc-like recording medium, and a second memory unit for storing therein an order for outputting the data array or a coordinate for outputting the data array. The data array is re-arrayed in accordance with an angle of rotation of the disc-like recording medium and then is output. The pattern data generator also includes a first memory unit for storing therein as a two-dimensional data array at least part of a data pattern formed on a disc-like recording medium, and a second memory unit for storing therein an order for outputting the data array or a coordinate for outputting the data array. The data array is re-arrayed in accordance with an angle of rotation of the disc-like recording medium and a radius of the same and is then output. These data pattern generators may include a delay unit for adding a predetermined delay quantity to the data array in accordance with a radius of the recording medium.

    26.
    发明专利
    未知

    公开(公告)号：DE69831837T2

    公开(公告)日：2006-07-06

    申请号：DE69831837

    申请日：1998-07-22

    Applicant: SONY CORP

    Inventor： YAMAGAMI TAMOTSU ,  TAKEDA TORU ,  KOBAYASHI SHOEI ,  OGIHARA KOICHIRO

    IPC: G11B7/007 ,  G11B7/2407 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/013 ,  G11B7/24 ,  G11B20/12

    Abstract: An optical recording medium capable of realizing high density and reliability in a recording/reproducing operation and facilitating the process which is performed by a drive apparatus is provided. The amplitude of an amount of wobbling of a track is made to be 10 nm to 15 nm and a track pitch of the track is made to be 0.74 µm to 0.82 µm. These values enable large-capacity recording to be realised and the recording/reproducing performance to be prevented from being deteriorated. As administration information, recommended information for a recording/reproducing operation at an inner peripheral position and an outer peripheral position is recorded. The size of data in a linking section is made to be the same as a sector for constituting a data block.

    27.
    发明专利
    未知

    公开(公告)号：DE60015899D1

    公开(公告)日：2004-12-23

    申请号：DE60015899

    申请日：2000-09-20

    Applicant: SONY CORP

    Inventor： TAKEDA TORU ,  KUMAI SATOSHI ,  KONISHI AYUMI ,  SUZUKI JUNICHI

    IPC: G11B7/09 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/12 ,  G11B27/19 ,  G11B27/30 ,  G11B7/00 ,  A61M1/00 ,  H01M2/16

    Abstract: There are provided a spindle motor 12, an optical head 20, a high-pass filter 31, low-pass filters 32 and 33, an adder 38, and a PLL 39. The spindle motor 12 rotatively drives an optical disk 11. The optical head 20 irradiates a laser beam onto a target track and both tracks adjacent to the target track on the optical disk 11 and detects a return light from each track. The high-pass filter 31 filters a high-frequency component in a signal used for detecting a return light from a target track in the optical head 20. Each of the low-pass filters 32 and 33 filters a low-frequency component in a signal used for detecting a return light from each of the adjacent tracks. The adder 38 operates output signals from the high-pass filter 31, and the low-pass filters 32 and 33. Based on a signal from the adder 38, the PLL 39 generates a reference signal used as a time reference for generating recording signals. An operation by the adder 38 nullifies a cross modulation component.

    Optical recording medium and recording method thereof
    28.
    发明专利
    Optical recording medium and recording method thereof 未知

    公开(公告)号：AU749969B2

    公开(公告)日：2002-07-04

    申请号：AU7747698

    申请日：1998-07-23

    Applicant: SONY CORP

    Inventor： YAMAGAMI TAMOTSU ,  TAKEDA TORU ,  KOBAYASHI SHOEI ,  OGIHARA KOICHIRO

    IPC: G11B7/2407 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/013 ,  G11B7/24 ,  G11B20/12

    Abstract: An optical recording medium capable of realizing high density and reliability in a recording/reproducing operation and facilitating the process which is performed by a drive apparatus is provided. The amplitude of an amount of wobbling of a track is made to be 10 nm to 15 nm and a track pitch of the track is made to be 0.74 µm to 0.82 µm. These values enable large-capacity recording to be realised and the recording/reproducing performance to be prevented from being deteriorated. As administration information, recommended information for a recording/reproducing operation at an inner peripheral position and an outer peripheral position is recorded. The size of data in a linking section is made to be the same as a sector for constituting a data block.

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