公开(公告)号：DE69706341D1

公开(公告)日：2001-10-04

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).

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.

公开(公告)号：ID25721A

公开(公告)日：2000-11-02

申请号：ID991033

申请日：1999-11-08

Applicant: SONY CORP

Inventor： TAKEDA TORU ,  KUMAI SATOSHI ,  MIKAMI TATSUO ,  UEHARA SYUJI ,  OKANISHI TOSHIHARU ,  OGAWA KENJI ,  NISHIDA NORIO ,  SATO SHOJI ,  SATO HIDEKI ,  ISHIKAWA HIDEKI ,  MUNEKATA KAZUMI ,  YANAMOTO KAORU ,  MINE NORICHIKA

IPC: G11B7/24 ,  G11B7/007 ,  G11B7/26 ,  G11B19/247 ,  G11B20/10 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30

Abstract: Disclosed herein are a disc recording medium (1), a recording apparatus and a playback apparatus, more concretely, the present invention provides a disc recording medium (1) wherein a circular track is created in advance to be used for recording data as a groove (GV) or a land (L), said track is wobbled to contain approximately fixed number of wobbling periods as counted in a longitudinal direction of said track, and said track includes rotational-angle marks each showing a predetermined rotational angular position on said disc recording medium. As a result, the precision and the reliability of recording can be attained.

公开(公告)号：DE69415456T2

公开(公告)日：1999-05-12

申请号：DE69415456

申请日：1994-03-04

Applicant: SONY CORP

Inventor： WATANABE KENJIRO ,  TAKEDA TORU ,  SEKO SATORU ,  KAWAZOE KAZUSHIGE ,  MUTO TAKAYASU ,  MORITA OSAMU ,  HAYASHI NOBUHIRO ,  ISHIDA TAKEHISA ,  ISHIOKA HIDEAKI ,  YAMAKOSHI TAKAMICHI

IPC: G11B5/008 ,  G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B5/64 ,  G11B5/09 ,  G11B5/73 ,  G11B5/82 ,  G11B5/84 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B21/10 ,  G11B25/04 ,  G11B27/19 ,  G11B27/30 ,  G11B33/14

Abstract: A magnetic disk apparatus suitable for use as a hard disk apparatus in a computer system. The apparatus includes a disk-like medium having a magnetic film formed on a surface, which information is recorded on or reproduced from; and magnetic heads (20 - 31) for recording on or reproducing from the information the disk-like medium. The disk-like medium has data recording regions (20 - 41D) and control signal recording regions (20 - 40), (20 - 41H). In the data recording regions, data tracks are raised and adjacent data tracks are separated by recessing guard bands (20 - 20). In the control signal recording region, on the other hand, tracking marks (20 - 12), (20 - 13) for tracking control of the magnetic heads, track number marks (20 - 71) for stipulating the tracks , track numbers (20 - 41b1), (20 - 41b2) and clock marks (20 - 11) for equidistantly dividing a circumference are formed in projections and recesses along the paths (21 - 21) of the magnetic heads. In this apparatus, the guard band is recessed with respect to the track. Accordingly, the guard band needs not be expanded so as to reduce cross-talk, and a recording capacity can be increased by reducing the track pitch. Because the tracking mark and the track number mark or the clock mark are formed in projections and recesses along the paths of the magnetic heads, accurate access becomes possible even when the track pitch is reduced.

公开(公告)号：DE69415456D1

公开(公告)日：1999-02-04

申请号：DE69415456

申请日：1994-03-04

Applicant: SONY CORP

Inventor： WATANABE KENJIRO ,  TAKEDA TORU ,  SEKO SATORU ,  KAWAZOE KAZUSHIGE ,  MUTO TAKAYASU ,  MORITA OSAMU ,  HAYASHI NOBUHIRO ,  ISHIDA TAKEHISA ,  ISHIOKA HIDEAKI ,  YAMAKOSHI TAKAMICHI

IPC: G11B5/008 ,  G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B5/64 ,  G11B5/09 ,  G11B5/73 ,  G11B5/82 ,  G11B5/84 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B21/10 ,  G11B25/04 ,  G11B27/19 ,  G11B27/30 ,  G11B33/14

Abstract: A magnetic disk apparatus suitable for use as a hard disk apparatus in a computer system. The apparatus includes a disk-like medium having a magnetic film formed on a surface, which information is recorded on or reproduced from; and magnetic heads (20 - 31) for recording on or reproducing from the information the disk-like medium. The disk-like medium has data recording regions (20 - 41D) and control signal recording regions (20 - 40), (20 - 41H). In the data recording regions, data tracks are raised and adjacent data tracks are separated by recessing guard bands (20 - 20). In the control signal recording region, on the other hand, tracking marks (20 - 12), (20 - 13) for tracking control of the magnetic heads, track number marks (20 - 71) for stipulating the tracks , track numbers (20 - 41b1), (20 - 41b2) and clock marks (20 - 11) for equidistantly dividing a circumference are formed in projections and recesses along the paths (21 - 21) of the magnetic heads. In this apparatus, the guard band is recessed with respect to the track. Accordingly, the guard band needs not be expanded so as to reduce cross-talk, and a recording capacity can be increased by reducing the track pitch. Because the tracking mark and the track number mark or the clock mark are formed in projections and recesses along the paths of the magnetic heads, accurate access becomes possible even when the track pitch is reduced.

公开(公告)号：ID20615A

公开(公告)日：1999-01-28

申请号：ID981041

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 ,  G11B3/00

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.

公开(公告)号：GB2274537A

公开(公告)日：1994-07-27

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 pattern and supplies it to apparatus such as a laser cutting machine for forming the pre-formatted data pattern (such as clock information, servo information and read-out information) in a disc. The generator includes a first memory unit 23 for storing a data array at least part of a data pattern to be formed on the disc, and a second memory unit 22 for storing an order or a coordinate for outputting the data array, the data array being re-arrayed in accordance with an angle of rotation of the disc as detected from timing pulses St. The first memory unit 23 may store a two-dimensional data array which may be re-arrayed in accordance with both an angle of rotation of the disc and with a radius of the same. The data pattern generator may include a delay unit for adding a predetermined delay quantity to the data array in accordance with a radius of the recording medium, thereby producing a data pattern which is curved in a radial direction.

公开(公告)号：DE69831837D1

公开(公告)日：2006-02-23

申请号：DE69831837

申请日：1998-07-22

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.

公开(公告)号：DK0893794T3

公开(公告)日：2005-11-07

申请号：DK98305833

申请日：1998-07-22

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.

公开(公告)号：DE69724043T2

公开(公告)日：2004-06-03

申请号：DE69724043

申请日：1997-06-12

Applicant: SONY CORP

Inventor： KOBAYASHI SHOEI ,  TAKEDA TORU ,  YAMAGAMI TAMOTSU ,  MASUDA SHOZO

IPC: G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/007 ,  G11B20/12 ,  G11B27/30 ,  G11B27/10

Abstract: Thermal stress is prevented from accumulating on a disk recording medium (1). Data to be recorded is divided into 32-kilobyte clusters, and a front link area and a back link area, whose lengths are randomly changed, formed of a total of 8 frames are added before and after the clusters. Then, the data is recorded on a predetermined area of a disk on the basis of address data prerecorded on the disk.