公开(公告)号：JP2005018986A

公开(公告)日：2005-01-20

申请号：JP2004302635

申请日：2004-10-18

Applicant: Sony Corp ,  ソニー株式会社

Inventor： KOBAYASHI SHOEI ,  YAMAGAMI TAMOTSU ,  TAKEDA RITSU ,  SAKO YOICHIRO

IPC: G11B20/12 ,  G11B7/007 ,  G11B20/10

Abstract: PROBLEM TO BE SOLVED: To record data at an accurate position at a high speed, in a disk in which an address is recorded by wobbling. SOLUTION: A track of the optical disk is divided into a plurality of clusters for recording data, in which a link area is formed between the clusters. The cluster and the link area are constituted by the unit of a frame, where one frame is formed of 85 bytes. One cluster is composed of 28 frames, or 16 K bytes. The link area is composed of two frames. In both of the cluster and the link area, an FS (Frame Sync: synchronization signal) of two bytes is placed at the head of each frame. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：以高速记录数据在通过摆动记录地址的盘中。 解决方案：光盘的轨道被分成多个用于记录数据的簇，其中在簇之间形成链路区域。 簇和链路区域由帧的单位构成，其中一个帧由85个字节组成。 一个集群由28个帧或16个K字节组成。 链路区域由两个帧组成。 在集群和链路区域中，两个字节的FS（帧同步：同步信号）位于每个帧的头部。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JPH10112166A

公开(公告)日：1998-04-28

申请号：JP26491096

申请日：1996-10-04

Applicant: SONY CORP

Inventor： MITSUNE NORICHIKA ,  TAKEDA RITSU ,  KOBAYASHI SHOEI ,  KIMURA SATORU

IPC: G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/007 ,  G11B20/12 ,  G11B20/18 ,  G11B27/00 ,  G11B27/034 ,  G11B27/32 ,  G11B19/247

Abstract: PROBLEM TO BE SOLVED: To provide a finalization method capable of reproducing an optical disk such as a DVD(digital video disk)-RAM, etc., by a reproducing device performing CLV(constant linear velocity) reproduction. SOLUTION: This finalization method is realized by processes from a step S10 to the step S70. That is, the unrecorded area map of the optical disk is formed on an LBA(logic block address) (S10-S30). For performing conversion from the LBA to a PBA(physical block address) normally performed in an optical disk drive by application of a host side, a conversion table from the LBA to the PBA is formed (S40). Based on this conversion table, the unrecorded area map is converted from the LBA to the PBA (S50), and the area to be fanalized is decided (S60). The dummy data are recorded on the decided area on the optical disk (S70).

公开(公告)号：JPH10105968A

公开(公告)日：1998-04-24

申请号：JP25194296

申请日：1996-09-24

Applicant: SONY CORP

Inventor： TAKEDA RITSU ,  SHIMAZU AKIRA ,  YAMAGAMI TAMOTSU ,  NOMOTO TADAAKI

IPC: G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/007 ,  G11B7/09 ,  G11B7/095 ,  G11B19/12

Abstract: PROBLEM TO BE SOLVED: To provide an optical recording device capable of removing an effect of cross erasure in recording. SOLUTION: With regard to such as optical recording method that an optical pickup 2 is moved on an optical disk 1, and the optical pickup 2 is positioned in a target track position, and then the optical disk 1 is irradiated with a light beam by the optical pickup 2 to record a recording mark on the optical disk 1, the subject optical recording method is performed to offset the target track position to a track on the side in a recording direction by a prescribed value in recording and to record continuously at least a prescribed track.

公开(公告)号：JPH09265630A

公开(公告)日：1997-10-07

申请号：JP7564296

申请日：1996-03-29

Applicant: SONY CORP

Inventor： KOBAYASHI SHOEI ,  TAKEDA RITSU ,  MITSUNE NORICHIKA

IPC: G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B19/04 ,  G11B19/247 ,  G11B19/28

Abstract: PROBLEM TO BE SOLVED: To enable the rotary control of a disk in which data are intermittently recorded in a CLV reproducing device. SOLUTION: When a recorded area in which data are substantially recorded and a non-recorded area in which data are not substantially recorded exist in an optical disk 1 intermittently, dummy data are recorded in the non-recorded area, the non-recorded area is reproduced continuously after the recorded area, a clock is extracted and the rotation of the optical disk 1 is made controllable. Consequently, runaway of a spindle motor is prevented.

公开(公告)号：JPH09198618A

公开(公告)日：1997-07-31

申请号：JP784496

申请日：1996-01-19

Applicant: SONY CORP

Inventor： ISHIOKA HIDEAKI ,  OONUKI YOSHIKAZU ,  SEKO SATORU ,  TAKEDA RITSU

IPC: G11B5/39 ,  G11B5/455 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B11/105 ,  G11B21/08 ,  G11B21/10 ,  G11B33/10

Abstract: PROBLEM TO BE SOLVED: To provide a data recording and reproducing device, etc., capable of easily measuring misalignment between a recording head and a reproducing head and accurately reproducing data even if an misalignment exists. SOLUTION: A reproduced signal amplitude detection circuit 23 detects the amplitude of the reproduced signal of test data from a reproducing amplifier 15. An adder 51 and an adder 52 integrally add amplitude values of the reproduced signals in a prescribed sector group of a magnetic disk 1 supplied from the reproduced signal amplitude detection circuit 23 and those of the reproduced signals in other prescribed sector group. A subtractor 50 calculates the difference between a first added value from the added 51 and a second added value from the adder 52 and supplies it to a controller 11. The controller 11 detects a misalignment between the recording head and the reproducing head from the difference value, and the controller 11 corrects the position of the recording head or the reproducing head based on the detected misalignment at the time of actual recording or reproducing.

公开(公告)号：JPH0969230A

公开(公告)日：1997-03-11

申请号：JP22318195

申请日：1995-08-31

Applicant: SONY CORP

Inventor： KOBAYASHI SHOEI ,  TAKEDA RITSU ,  YAMAGAMI TAMOTSU

IPC: G11B7/24 ,  G11B7/00 ,  G11B7/004 ,  G11B7/007 ,  G11B7/085 ,  G11B20/12 ,  G11B21/08 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30

Abstract: PROBLEM TO BE SOLVED: To make it possible to perform high-speed access by gray-coding address information. SOLUTION: Gray codes are made to correspond to the data number from O to F (hexadecimal number). Gray codes are constituted of upper order addresses and lower order addresses. Four channels (ch) constituting the upper order address and four ch constituting the lower order address are set so that the respective one ch always becomes 1. At this time, the ch of 1 in the lower order address of the corresponding gray code is sequentially shifted to the neighboring position accompanied by the change of the values of the data from O to F. Only the lower order address is detected, and the high-speed seeking is performed.

公开(公告)号：JPH0955039A

公开(公告)日：1997-02-25

申请号：JP25207895

申请日：1995-08-15

Applicant: SONY CORP

Inventor： TAKEDA RITSU ,  OSAWA YOSHITOMO

IPC: G11B20/12 ,  G11B7/007 ,  H04L9/34

Abstract: PROBLEM TO BE SOLVED: To improve the secrecy of the data. SOLUTION: Clusters recording the data and link areas recording control information required for reproducing the data are arranged alternately on an optical disk. Although the clusters are accessed from the outside, the link areas are constituted so that they aren't accessed from the outside. The data recorded on the clusters are scrambled, and a key (copy protective information) for descrambling them is recorded on the link areas.

公开(公告)号：JPH0765526A

公开(公告)日：1995-03-10

申请号：JP22941493

申请日：1993-08-23

Applicant: SONY CORP

Inventor： MASUOKA MASARU ,  TAKEDA RITSU ,  WATANABE MINORU

IPC: G11B21/12 ,  G11B21/21

Abstract: PURPOSE:To prevent the stiction between a magnetic head and a head slider by separating the head slider from the surface of the magnetic head towards arm inner periphery when the magnetic head stops. CONSTITUTION:In a magnetic disc apparatus 10, a cam member 12 is provided at the side of an inner periphery of a cam follower 11 extending from an end of a suspension 6 of an actuator 3 and a disc 2. A slope 12b is formed in the cam member, which is gradually increased in thickness towards an inner peripheral edge of the magnetic disc 2. When the magnetic disc apparatus is to be stopped after driving, the rotation of the magnetic disc is stopped by a control part 13 and, after a head slider 7 lands on the surface of the magnetic disc 2, the actuator 3 is driven to move the cam follower 11 in a direction R2 along the slope 12b of the cam member 12. As a result, the head slider 7 is separated from the surface of the magnetic disc 2 and loaded on a flat part 12a of the cam member. Accordingly, the time when the head slider is in touch with the disc is reduced, thereby to prevent a stick and enhance reliability.

公开(公告)号：JPH0750076A

公开(公告)日：1995-02-21

申请号：JP11506594

申请日：1994-05-27

Applicant: SONY CORP

Inventor： ISHIOKA HIDEAKI ,  OONUKI YOSHIKAZU ,  TAKEDA RITSU

IPC: G11B19/20 ,  G11B21/10

Abstract: PURPOSE:To reduce the current required when a recording/reproducing head stands by on a predetermined track. CONSTITUTION:A recording/reproducing head 6 is moved on the basis of a target position signal indicating a predetermined target position on a disc 7. A position signal obtained by adding a shift from the predetermined target position to the target position signal is input to a controller 4. The position of the recording/reproducing head 6 is controlled by a VCM 5 of a driving means using an output from the controller 4. The apparatus is provided with a tracking servo system as above. The apparatus has also a storing means 1 for storing an eccentricity data showing a tracking position of the recording/ reproducing head 6 corresponding to an eccentricity of the disc 7. The position of the recording/reproducing head 6 is controlled by adding the eccentricity data from the storing means 1 to the target position signal.

公开(公告)号：JPH0745021A

公开(公告)日：1995-02-14

申请号：JP18642193

申请日：1993-07-28

Applicant: SONY CORP

Inventor： ISHIDA TAKEHISA ,  TAKEDA RITSU

IPC: G11B5/596 ,  G11B5/65 ,  G11B5/82 ,  G11B21/10

Abstract: PURPOSE:To improve recording and reproducing characteristics by suppressing the fluctuation in the flying height in the rugged parts of a preformat region of the magnetic disk. CONSTITUTION:This magnetic disk is constituted by providing the surface of a substrate with a magnetic layer and providing at least a part thereof with the preformat region 11 previously formed with information by ruggedness. Recording and reproducing are conducted at the prescribed flying height by a floating magnetic head. The preformat region 11 is constituted by making the total area of the projecting parts 3 therein larger than the total area of the recessed parts 4. Consequently, the influence on the flying height is suppressed at the time the magnetic head passes on the recessed parts 4.