公开(公告)号：JPH03113780A

公开(公告)日：1991-05-15

申请号：JP24770389

申请日：1989-09-22

Applicant: SONY CORP

Inventor： HIDA MINORU

IPC: G11B21/08

Abstract: PURPOSE:To correct the remaining distance of a pickup to a target track even if a gray code is misread by using the remaining distance of the pickup to the target track obtained by subtracting a track address from the target track. CONSTITUTION:The remaining distance of the pickup to the target track from an input terminal 2 obtained by subtracting the read output RA of the track address from the track address TA of the target track is stored in a register 7. On the other hand, the remaining distance of the pickup to the target track obtained by subtracting the accumulation of the movement of the pickup outputted from a subtraction circuit 16 from seek distance XA is stored in the register 6. Now, in the case where there is an error in the read output RC of the gray code, the error is caused in the remaining distance of the pickup to the target track stored in the register 6. Here, if the remaining distance of the pickup to the target track stored in the register 6 is replaced by the remaining distance of the pickup to the target track stored in the register 7, this error is corrected.

公开(公告)号：JPH0316062A

公开(公告)日：1991-01-24

申请号：JP14939089

申请日：1989-06-14

Applicant: SONY CORP

Inventor： SUMIHIRO HIROSHI ,  HIDA MINORU ,  TSUKAMURA YOSHIHIRO

IPC: G11B20/10

Abstract: PURPOSE:To prevent an erroneous detection of data and to improve an error rate by replacing the minimum value of a selected bit and the maximum value of an unselected bit, when other pattern than a pattern determined by a modulation system is detected. CONSTITUTION:When a pattern which is not determined by a modulation system is detected in the differential detection using a modulation system of 5-7 modulation, a channel bit of the minimum level in selected channel bits is set to '0', a channel bit of the maximum level in unselected channel bits is set to '1', and their replacement operation is repeated until the pattern determined by the modulation system is obtained. In such a way, an error can be corrected, and an error rate of an optical disk and a magneto-optical disk can be improved.

公开(公告)号：JP2006197626A

公开(公告)日：2006-07-27

申请号：JP2006033314

申请日：2006-02-10

Applicant: Sony Corp ,  ソニー株式会社

Inventor： NAKAGAWA TOSHIYUKI ,  OKAMURA SADANARI ,  HIDA MINORU

IPC: H03M7/14 ,  G11B20/14

Abstract: PROBLEM TO BE SOLVED: To realize a modulating device which suppresses increase in circuit scale.
SOLUTION: In a comparison portion 58 of a DSV bit control determining portion 31, an accumulation DSV value to a first hypothesis bit insertion bit stream which inserts "0" in an input data stream as a candidate for DSV control bit, and the accumulation DSV value to a 2nd candidate bit insertion bit stream which inserted "1" in an input data stream as an other candidate of the DSV control bit are supplied, respectively. A comparison portion 58 compares the modulus of these two accumulation DSV values, chooses a data stream (the 1st or the 2nd candidate bit insertion bit stream) which has a small accumulation DSV value in modulus, and determines as a DSV control bit the 1st or the 2nd candidate DSV control bit (if it is a 1st candidate bit insertion bit stream, the bit is "0", and if it is a 2nd candidate bit insertion bit stream, the bit is "1"), inserted in the selected data stream. The present invention is applicable to modulation devices.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：实现抑制电路规模增加的调制装置。 解决方案：在DSV位控制确定部分31的比较部分58中，将累加DSV值与在输入数据流中插入“0”作为DSV控制位候选的第一假设位插入位流，以及 分别提供在作为DSV控制位的其他候选者的输入数据流中插入“1”的第二候选比特插入比特流的累积DSV值。 比较部分58比较这两个累积DSV值的模数，选择具有模数的累积DSV值小的数据流（第1或第2候选比特插入比特流），并将DSV控制比特确定为第1或第 第二候选DSV控制位（如果它是第一候选比特插入比特流，该比特是“0”，并且如果它是第二候选比特插入比特流，则该比特是“1”），插入到所选择的数据 流。 本发明适用于调制装置。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2004265463A

公开(公告)日：2004-09-24

申请号：JP2003025233

申请日：2003-01-31

Applicant: Sony Corp ,  ソニー株式会社

Inventor： TERAOKA YOSHIYUKI ,  HIDA MINORU ,  ISHII TAMOTSU

IPC: G11B11/105 ,  G11B7/125

CPC classification number: G11B11/10595 ,  G11B7/126 ,  G11B11/1051 ,  G11B11/1053

Abstract: PROBLEM TO BE SOLVED: To provide a data recorder which prevents the deterioration of a recording characteristic caused by the change of environmental temperatures, while taking the performance of laser beam source into consideration, and also to provide the data recording method and program. SOLUTION: The data recorder is provided with a control means for changing over a pulse width of a recording pulse in accordance with a recording medium and/or the temperature around it, and the changeover is made according to the temperature so that the pulse width becomes narrower within the range not exceeding the rating of a laser diode. That is, the pulse width of the recording pulse is changed over stepwise so as to obtain a peak power of a maximum rating or lower of the laser diode by increasing the pulse width at the low temperature, while preventing the deterioration of the recording characteristic by reducing the pulse width at the high temperature. COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2004213835A

公开(公告)日：2004-07-29

申请号：JP2003002654

申请日：2003-01-08

Applicant: Sony Corp ,  ソニー株式会社

Inventor： TERAOKA YOSHIYUKI ,  HIDA MINORU

IPC: G11B11/105 ,  G11B5/02

Abstract: PROBLEM TO BE SOLVED: To provide a data recorder in which asymmetry of a recording signal caused by leak magnetic field from an optical pickup or the like and floating magnetic field or the like from the adjacent track of the disk can be corrected highly accurately and highly efficiently, and a data recording method. SOLUTION: A modulated magnetic field modulated by recording data is applied to a magneto-optical disk as a recording field, and data recording is performed by irradiating the recording surface of the magneto-optical disk with a recording pulse. At this time, pulse width of the recording pulse is set variably so that offset quantity of the recording magnetic field due to leak magnetic field caused by the device or the magneto-optical disk itself is canceled. For example, when an original recording magnetic field D1 becomes a recording magnetic field D2 by an offset magnetic field C, disk surface temperature is lowered from T1 to T2 and offset quantity is canceled by applying a recording pulse P2 in which width of the recording pulse P1 is set narrow. COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2003296943A

公开(公告)日：2003-10-17

申请号：JP2002098045

申请日：2002-03-29

Applicant: Sony Corp ,  ソニー株式会社

Inventor： HIDA MINORU

IPC: G11B7/005 ,  G11B7/007 ,  G11B7/085 ,  G11B7/26 ,  G11B11/105 ,  G11B27/034 ,  G11B27/10 ,  G11B27/19 ,  G11B27/24 ,  G11B7/24

CPC classification number: G11B11/10563 ,  G11B7/00736 ,  G11B11/10582 ,  G11B11/10584 ,  G11B20/00094 ,  G11B20/00173 ,  G11B27/034 ,  G11B27/10 ,  G11B27/19 ,  G11B27/24 ,  G11B2220/20 ,  G11B2220/2525 ,  G11B2220/2529

Abstract: PROBLEM TO BE SOLVED: To provide an optical disk capable of providing an area for recording an identification number unique to the disk to a place of the disk not disturbing the increase of a recording capacity without making a read mechanism and processing complicated. SOLUTION: The optical disk is provided with an identification number UID (Unique ID) recording area at the inside of areas comprising 16 sector divisions from sectors Sector 0 to Sector 15. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供一种光盘，其能够提供用于将盘独有的识别号码记录到盘的位置而不会使读取机构和处理变得复杂而不影响记录容量的增加的区域。

解决方案：光盘在从扇区0到扇区15的16个扇区分区的内部设置有识别号码UID（唯一ID）记录区域。版权所有（C）2004，JPO

公开(公告)号：JP2003208764A

公开(公告)日：2003-07-25

申请号：JP2002007254

申请日：2002-01-16

Applicant: SONY CORP

Inventor： NAKAGAWA TOSHIYUKI ,  OKAMURA SADANARI ,  HIDA MINORU

IPC: G11B20/14 ,  H03M5/14 ,  H03M7/14 ,  H04L25/49

Abstract: PROBLEM TO BE SOLVED: To provide a modulating device the circuitry of which is simplified that can be easily applicable to other systems. SOLUTION: A pattern conversion section 32 converts data whose basic data length is 2-bits fed to a DSV (Digital Sum Value) control bit decision/ insertion section 31 into a variable length code whose basic code length is 3-bits according to a conversion table. Further, a minimum run consecutive limit code detection section 33 detects a position at which a channel bit stream converted by the pattern conversion section 32 is consecutive minimum runs from a data stream to which a DSV control bit is inserted. A consecutive minimum run replacement section 34 replaces a prescribed part of the channel bit stream supplied to the pattern conversion section 32 with a prescribed pattern on the basis of position information supplied to the minimum run consecutive limit code detection section 33 to limit the consecutiveness of minimum runs within a prescribed number of times. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003099940A

公开(公告)日：2003-04-04

申请号：JP2001291161

申请日：2001-09-25

Applicant: SONY CORP

Inventor： TANAKA FUJI ,  TERAOKA YOSHIYUKI ,  ISHII TAMOTSU ,  HATTORI MASATO ,  HIDA MINORU

IPC: G11B20/10 ,  G11B7/0045 ,  G11B7/30 ,  G11B27/00

Abstract: PROBLEM TO BE SOLVED: To enhance the reliability of management information. SOLUTION: In a recording medium such that both a land and a groove are used as a recording track, a management area is constituted so that only the land is used for recording management information rewritable as the recording track, and so that a groove track is not used. This provides the laser power setting specialized in a land track in the management area, and makes the consideration about a cross light to the groove track unneeded, which is produced due to recording on the land track. Therefore, the tolerance of laser power for recording management information can be extended, and a reliable recording operation can be achieved. And, management information recorded can be appropriately maintained since management information of the land track is not be erased by the cross light due to recording on the groove track.

公开(公告)号：JP2003085757A

公开(公告)日：2003-03-20

申请号：JP2001275271

申请日：2001-09-11

Applicant: Sony Corp ,  ソニー株式会社

Inventor： HIDA MINORU

IPC: G11B7/0045 ,  G11B7/005 ,  G11B7/085 ,  G11B7/125

Abstract: PROBLEM TO BE SOLVED: To attain the precise setting of laser power in a short time. SOLUTION: A 1st sector format corresponding to the physically recorded address information is set, meanwhile, with respect to a disk recording medium to which the data recording/reproducing operation is performed by a 2nd sector format at the recording/reproducing time, the recording/reproducing operation at the laser power setting is performed by the 1st sector format. Also, a certain start position on a track is set, and an end position which is the position within one round from the start position, is set as the position returnable to the start position by a track jump in the period of the round of the disk 1 from the above start position, then the specified recording/reproducing operation for setting the laser power is executed in the section from the start position to the end position.

Abstract translation: 要解决的问题：在短时间内实现激光功率的精确设定。 解决方案：设置对应于物理记录的地址信息的第一扇区格式，同时，相对于在记录/再现时间以第二扇区格式执行数据记录/再现操作的盘记录介质，记录/ 激光功率设定的再生动作由第1扇区格式进行。 此外，设定轨道上的某个起始位置，并且将从起始位置开始的一个循环内的位置的结束位置设定为通过在轮的周期中的轨迹跳跃返回到起始位置的位置 盘1从上述开始位置开始，则在从开始位置到结束位置的部分中执行用于设定激光功率的规定的记录/重放操作。

公开(公告)号：JP2002230776A

公开(公告)日：2002-08-16

申请号：JP2001025931

申请日：2001-02-01

Applicant: SONY CORP

Inventor： HIDA MINORU ,  KURIKI HIROSHI

IPC: G11B7/0045 ,  G11B7/09

Abstract: PROBLEM TO BE SOLVED: To prevent erroneous recording by detecting the vibration and impact to a recordable and reproducible optical disk. SOLUTION: A counter 56 counts the number of times a tracking error signal TE exceeds a first threshold Th1. When this count value CT1 exceeds the prescribed value within the prescribed time measured by a first clock counter 60, the counter 56 outputs an enable signal EN to a flip-flop 62. When the tracking error signal TE thereafter exceeds a second threshold Th2 within the prescribed time measured by a second clock counter 66, the flip-flop 62 stops recording by outputting a recording mask signal EM.