公开(公告)号：EP1455456A4

公开(公告)日：2007-05-23

申请号：EP02804658

申请日：2002-12-10

Applicant: SONY CORP

Inventor： NAKAGAWA TOSHIYUKI ,  OKAMURA HIROSHIGE ,  TOBITA MINORU

IPC: G11B20/10 ,  G11B20/14 ,  H03M5/14 ,  H03M7/14

CPC classification number: H03M5/145 ,  G11B20/10 ,  G11B20/1426 ,  G11B2020/1457

Abstract: A modulating apparatus, a modulating method and a DSV control bit producing method that can suppress increase of circuit scale of the modulating apparatus. An input data string is supplied to a DSV control bit deciding part (31), which decides a DSV control bit to be inserted into the input data string. The input data string is also supplied at the same time to a delay processing part (32), delayed thereby by a predetermined delay time, and then supplied to a decided DSV control bit inserting part (33). The decided DSV control bit inserting part (33) inserts the DSV control bit in a predetermined position of the input data string supplied from the delay means, and then supplies the input data string to a modulating part (34). The modulating part (34) modulates the input data string, into which the DSV control bit has been inserted, into a code string in accordance with a predetermined conversion rule (for example, 1,7PP modulation).

公开(公告)号：EP1492096A4

公开(公告)日：2005-06-15

申请号：EP03745415

申请日：2003-03-18

Applicant: SONY CORP

Inventor： TOBITA MINORU

IPC: G11B11/105 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/26

CPC classification number: G11B11/10584 ,  G11B7/0045 ,  G11B7/0079 ,  G11B7/24082 ,  G11B7/261 ,  G11B11/10504 ,  G11B11/10582 ,  G11B11/10595

Abstract: An optical disc (200) has a recording region divided into 28 zones from zone Z0 to Z27. Between adjacent tracks within a zone, the wave numbers of wobble are made identical. That is, the wave numbers of ADIP carrier are made identical. Thus, it is possible to match the inphase with the outphase in average, thereby reducing a WPP signal. Thus, it is possible to obtain an optical disc in which a low-frequency component is not superimposed on a push-pull signal even if the track pitch is smaller than 1.6 micrometers such as the next-generation MD (2) having the track pitch as small as 1.25 micrometers and even if a mark is to be detected from the groove by DWDD.

公开(公告)号：EP0729150A4

公开(公告)日：1998-05-20

申请号：EP95930703

申请日：1995-09-06

Applicant: SONY CORP

Inventor： SAKO YOICHIRO ,  YAMAGAMI TAMOTSU ,  OTSUKA SATOSHI ,  TOBITA MINORU

IPC: G11B20/12 ,  G11B20/18

CPC classification number: G11B20/1833 ,  G11B20/1258 ,  G11B2020/1272

Abstract: Data recorded on such a recording medium as an optical disk, are reproduced excellently even when burst errors occur during reproduction, without reducing the data record capacity of the recording medium. A first error correcting code is generated for every block of a certain amount of data, and added to the corresponding block, a second error correcting code is generated for the every block and added to the other blocks than the block for which the second error correcting code is generated. These data and codes are recorded on the recording medium. When reproducing the data, recorded on the recording medium in blocks of data, whether or not detection correction is possible or not is judged based on the first error correcting codes included in the reproduced data. When the detection correction of a block is possible, the detection correction is performed, and when impossible, missing information is generated based on the second error correcting codes reproduced from the data blocks and corresponding to the block of which detection correction is impossible. Using the missing information and the first error correcting code, missing correction of the data block is performed.

Abstract translation: 记录在这样的记录介质上的数据，即使在再现期间出现突发错误，也不会降低记录介质的数据记录容量，因而再现出色。 对于一定数量的数据的每个块生成第一纠错码，并将其添加到相应的块中，为每个块生成第二个纠错码，并将其添加到其它块，而不是第二个纠错码 代码生成。 这些数据和代码被记录在记录介质上。 基于包含在再现数据中的第一纠错码来判断在数据块中记录在记录介质上的数据是否可能进行检测校正。 当块的检测校正成为可能时，执行检测校正，并且如果不可能，则基于从数据块再现的第二纠错码并且与不能进行检测校正的块相对应地生成丢失信息。 使用缺失的信息和第一个纠错码，执行数据块的修正。

公开(公告)号：BR0300852A

公开(公告)日：2004-08-17

申请号：BR0300852

申请日：2003-03-31

Applicant: SONY CORP

Inventor： TOBITA MINORU ,  TERAOKA YOSHIYUKI ,  TANAKA TOMIJI ,  HATTORI MASATO ,  ISHII TAMOTSU

IPC: G11B23/03 ,  G11B11/105 ,  G11B19/28 ,  G11B20/00 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B27/034 ,  G11B27/036 ,  G11B27/10 ,  G11B27/19 ,  G11B27/24 ,  G11B27/32 ,  G11B27/34 ,  G11B7/007

Abstract: An information recording/reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium that includes a first magnetic layer for recording at least information, a second magnetic layer for regulating a switched connective force, and a third magnetic layer for shifting a magnetic wall of recorded markings for information reproduction. The three layers being stacked on a transparent substrate to make up the storage medium. The information recording/reproducing apparatus includes an optical head and a magnetic head. The optical head has a light source and an objective lens, the light source is configured to emit at least a laser beam with a wavelength of about 780 nm, the objective lens having a numerical aperture of about 0.45 and is configured to focus the laser beam from the light source into a beam spot for emission onto the magneto-optical storage medium. The magnetic head is for applying a recording magnetic field to the magneto-optical storage medium.

公开(公告)号：DE69531527T2

公开(公告)日：2004-06-24

申请号：DE69531527

申请日：1995-09-12

Applicant: SONY CORP

Inventor： SAKO YOICHIRO ,  YAMAGAMI TAMOTSU ,  OTSUKA SATOSHI ,  TOBITA MINORU

IPC: G11B7/007 ,  G11B20/12 ,  G11B20/18 ,  G11B27/19 ,  G11B27/30

Abstract: Method of recording on a record medium (4) by receiving a series of data elements, adding error detection and error correction data to each data element, moving some of the data in each data element to an adjacent data element to produce arranged data elements, and recording the arranged data elements in different sectors on a record medium (4). Upon reproduction of the arranged data elements from a record medium (4), some of the data in each arranged data element are moved to an adjacent data element to produce rearranged data elements. Errors in each rearranged data element are detected and corrected using data contained therein. A record medium (4) having concentric tracks on which a plurality of sectors are located stores data in each of the sectors. The data in each sector pertains to two different sectors so that the affect of a burst error on a particular sector is minimized.

公开(公告)号：CA2423526A1

公开(公告)日：2003-10-01

申请号：CA2423526

申请日：2003-03-26

Applicant: SONY CORP

Inventor： ISHII TAMOTSU ,  TANAKA TOMIJI ,  TERAOKA YOSHIYUKI ,  HATTORI MASATO ,  TOBITA MINORU

IPC: G11B23/03 ,  G11B11/105 ,  G11B19/28 ,  G11B20/00 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B27/034 ,  G11B27/036 ,  G11B27/10 ,  G11B27/19 ,  G11B27/24 ,  G11B27/32 ,  G11B27/34 ,  G11B13/04 ,  G11B7/12

Abstract: An information recording/reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium that includes a first magnetic layer for recording at least information, a second magnetic layer for regulating a switched connective force, and a third magnetic layer for shifting a magnetic wall of recorded markings for information reproduction. The three layers being stacked on a transparent substrate to make up the storage medium. The information recording/reproducing apparatus includes an optical head and a magnetic head. The optical head has a light source and an objective lens, the light source is configured to emit at least a laser beam with a wavelength of about 780 nm, the objective lens having a numerical aperture of about 0.45 and is configured to focus the laser beam from the light source into a beam spot for emission onto the magneto-optical storage medium. The magnetic head is for applying a recording magnetic field to the magneto-optical storage medium.

公开(公告)号：NL194850C

公开(公告)日：2003-04-03

申请号：NL9400770

申请日：1994-05-09

Applicant: SONY CORP

Inventor： TOBITA MINORU

IPC: G11B20/18 ,  G11B7/005 ,  G11B11/105 ,  G11B20/10

公开(公告)号：HK1017478A1

公开(公告)日：1999-11-19

申请号：HK99102625

申请日：1999-06-21

Applicant: SONY CORP ,  SHARP KK ,  SANYO ELECTRIC CO ,  FUJITSU LTD

Inventor： TOBITA MINORU ,  MAEDA SHIGEMI ,  HIOKI TOSHIAKI ,  MATSUURA MICHIO

IPC: G11B7/24 ,  G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B7/095 ,  G11B11/105 ,  G11B27/19 ,  G11B27/30 ,  G11B

Abstract: An optical disc and an optical disc drive for the optical disc are provided which are suitable for recording data with a high density. The optical disc D uses both lands and grooves as recording tracks. Each of the tracks consists of one address segment and forty five data segments. The address segment is wobbled at one side thereof. Each of the data segments is a DC groove. The address segment records an address information including a sync signal, frame address, track address and CRC, a tilt pattern and a clock mark. The clock mark is adapted to reflect laser beam in one amount before the mark and in another amount after the mark. The tilt pattern has a different track pitch from those in other areas. The data segments record data magneto-optically.

公开(公告)号：SG65754A1

公开(公告)日：1999-06-22

申请号：SG1998000957

申请日：1998-05-05

Applicant: SONY CORP

Inventor： TOBITA MINORU ,  TOSAKA SUSUMU ,  NIWA YOSHIKATSU ,  NAKAO SHINICHI ,  FUJITA GORO

IPC: G11B7/00 ,  G11B11/00 ,  G11B11/10 ,  G11B20/00 ,  G11B20/10

公开(公告)号：ID20448A

公开(公告)日：1998-12-24

申请号：ID980892

申请日：1998-06-18

Applicant: SONY CORP ,  SHARP KK ,  SANYO ELECTRIC CO ,  FUJITSU LTD

Inventor： TOBITA MINORU ,  MAEDA SHIGEMI ,  HIOKI TOSHIAKI ,  MATSUURA MICHIO

IPC: G11B7/24 ,  G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B7/095 ,  G11B11/105 ,  G11B27/19 ,  G11B27/30 ,  B32B5/16

Abstract: An optical disc and an optical disc drive for the optical disc are provided which are suitable for recording data with a high density. The optical disc D uses both lands and grooves as recording tracks. Each of the tracks consists of one address segment and forty five data segments. The address segment is wobbled at one side thereof. Each of the data segments is a DC groove. The address segment records an address information including a sync signal, frame address, track address and CRC, a tilt pattern and a clock mark. The clock mark is adapted to reflect laser beam in one amount before the mark and in another amount after the mark. The tilt pattern has a different track pitch from those in other areas. The data segments record data magneto-optically.