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：DE69104235T2

公开(公告)日：1995-01-26

申请号：DE69104235

申请日：1991-01-17

Applicant: SONY CORP

Inventor： MISAWA SEIICHI ,  TOMITSUKA HIDEMI ,  ISHIOKA HIDEAKI

IPC: G11B15/02 ,  G04G15/00 ,  H04N5/76 ,  H04N5/782

Abstract: In a timer reservation recording system, reservation information which was reserved in the past is registered in database means for each program together with a degree of certainty thereof which is to be renewed according to a frequency of reservation thereof. On timer reservation, the registered reservation information is searched and displayed according to the degree of certainty thereof, and thereby it is possible to obtain a timer reservation recording system which is capable of easily and positively timer record desired programs.

公开(公告)号：DE69104235D1

公开(公告)日：1994-11-03

申请号：DE69104235

申请日：1991-01-17

Applicant: SONY CORP

Inventor： MISAWA SEIICHI ,  TOMITSUKA HIDEMI ,  ISHIOKA HIDEAKI

IPC: G11B15/02 ,  G04G15/00 ,  H04N5/76 ,  H04N5/782

Abstract: In a timer reservation recording system, reservation information which was reserved in the past is registered in database means for each program together with a degree of certainty thereof which is to be renewed according to a frequency of reservation thereof. On timer reservation, the registered reservation information is searched and displayed according to the degree of certainty thereof, and thereby it is possible to obtain a timer reservation recording system which is capable of easily and positively timer record desired programs.

公开(公告)号：DE69319209T2

公开(公告)日：1998-12-10

申请号：DE69319209

申请日：1993-12-02

Applicant: SONY CORP

Inventor： TAKEDA TORU ,  SEKO SATORU ,  ISHIOKA HIDEAKI ,  TOMISAKI ITARU

IPC: G11B5/48 ,  G11B7/095 ,  G11B21/10

Abstract: A magnetic or optical disc device which can correctly follow up the eccentricity of an eccentrically chucked disk and which can immediately follow up the eccentricity of the new disk face when there is a changeover of the disc face being accessed has: a disc, having data tracks provided with uniformly spaced clock marks for providing a timing standard; reproduction means, for reproducing data from the disc; clock sampling means, for extracting a first clock signal outputted by the reproduction means; eccentricity magnitude memory means, for storing a signal corresponding to the eccentricity of the data tracks with respect to the axis of rotation of the disc; clock correction means, including voltage control oscillator means, for, according to the signal corresponding to the eccentricity, causing a second clock signal outputted by the voltage control oscillator means to follow the first clock signal by changing the phase of the second clock signal or the frequency of the second clock signal; and eccentricity magnitude measuring means, for measuring the signal corresponding to the eccentricity from the first clock signal and the output signal of the reproduction means and supplying it to the eccentricity magnitude memory means. The eccentricity magnitude measuring means measures the signal corresponding to the eccentricity by some method such as calculating the number of tracks which the reproduction head crosses or using the non-uniformity of spacing observed in a string of clock pulses reproduced from the uniformly spaced clock marks in the disc.

公开(公告)号：DE69319209D1

公开(公告)日：1998-07-23

申请号：DE69319209

申请日：1993-12-02

Applicant: SONY CORP

Inventor： TAKEDA TORU ,  SEKO SATORU ,  ISHIOKA HIDEAKI ,  TOMISAKI ITARU

IPC: G11B5/48 ,  G11B7/095 ,  G11B21/10

Abstract: A magnetic or optical disc device which can correctly follow up the eccentricity of an eccentrically chucked disk and which can immediately follow up the eccentricity of the new disk face when there is a changeover of the disc face being accessed has: a disc, having data tracks provided with uniformly spaced clock marks for providing a timing standard; reproduction means, for reproducing data from the disc; clock sampling means, for extracting a first clock signal outputted by the reproduction means; eccentricity magnitude memory means, for storing a signal corresponding to the eccentricity of the data tracks with respect to the axis of rotation of the disc; clock correction means, including voltage control oscillator means, for, according to the signal corresponding to the eccentricity, causing a second clock signal outputted by the voltage control oscillator means to follow the first clock signal by changing the phase of the second clock signal or the frequency of the second clock signal; and eccentricity magnitude measuring means, for measuring the signal corresponding to the eccentricity from the first clock signal and the output signal of the reproduction means and supplying it to the eccentricity magnitude memory means. The eccentricity magnitude measuring means measures the signal corresponding to the eccentricity by some method such as calculating the number of tracks which the reproduction head crosses or using the non-uniformity of spacing observed in a string of clock pulses reproduced from the uniformly spaced clock marks in the disc.

公开(公告)号：MY133012A

公开(公告)日：2007-10-31

申请号：MYPI9900021

申请日：1999-01-05

Applicant: SONY CORP

Inventor： ONUKI YOSHIKAZU ,  ISHIOKA HIDEAKI

IPC: G11B5/596 ,  G11B21/08 ,  G11B21/10

Abstract: A HEAD POSITIONING CONTROL APPARATUS AND METHOD WHICH COMPENSATES FORPOSITIONAL DEVIATION OF A MAGNETIC HEAD (14) WITH RESPECT TO THE POSITIONING OF THE HEAD ON A PARTICULAR TRACK OF A DISC RECORDING MEDIUM (11A,11B) VIA A TRACKING CONTROL. ADDITIONALLY, DURING A SEEK MODE OF THE APPARATUS (70), A HEAD THAT WAS POSITIONED AS A RESULT OF THE TRACKING CONTROL IS MOVED TO A NEIGHBORING TRACK OF THE DISC RECORDING MEDIUM. THE SEEK MODE USES THE INFORMATION OBTAINED DURING THE TRACKING MODE TO CORRECT ANY DISTURBANCE FREQUENCIES OCCURRING IN SYNCHRONISM WITH THE ROTATIONAL FREQUENCY OF THE DISC RECORDING MEDIUM, EVEN IF THE HEAD TRAVELS OVER A LARGE DISTANCE.(FIG. 11)

公开(公告)号：CA2034262A1

公开(公告)日：1991-07-19

申请号：CA2034262

申请日：1991-01-16

Applicant: SONY CORP

Inventor： MISAWA SEIICHI ,  TOMITSUKA HIDEMI ,  ISHIOKA HIDEAKI

IPC: G11B15/02 ,  G04G15/00 ,  H04N5/76 ,  G11B15/18

Abstract: In a timer reservation recording system, reservation information which was reserved in the past is registered in database means for each program together with a degree of certainty thereof which is to be renewed according to a frequency of reservation thereof. On timer reservation, the registered reservation information is searched and displayed according to the degree of certainty thereof, and thereby it is possible to obtain a timer reservation recording system which is capable of easily and positively timer record desired programs.

公开(公告)号：JP2009295247A

公开(公告)日：2009-12-17

申请号：JP2008149286

申请日：2008-06-06

Applicant: Sony Corp ,  ソニー株式会社

Inventor： ISHIOKA HIDEAKI ,  FUKUYAMA MUNEKATSU

IPC: G11B7/09

Abstract: PROBLEM TO BE SOLVED: To accurately control tracking at the reproduction operation of an optical disk in which one of a data unrecorded portion and a data recorded portion of track, has extremely lower reflectivity than the other which has extremely higher reflectivity than the one. SOLUTION: The main laser beam irradiates a desired track of an optical disk. One and the other sublaser beam irradiates one and the other gap portions adjacent to the desired track by following and preceding to the main laser beam. The tracking error signal is generated based on the main reflected light received and one and the other sub reflected light. It detects that the irradiation position of the main laser beam reaches the recorded boundary position and the unrecorded boundary position based on a change in the light quantity of one or the other sub reflected light. The tracking error signal is corrected while the other track of extremely higher reflectivity is irradiated with the main laser beam. Even when the irradiation position with the main laser beam is displaced over the data unrecorded portion and the data recorded portion, tracking can be controlled accurately by preventing a change in the amplitude of the tracking error signal. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了精确地控制在其中数据未记录部分和轨道的数据记录部分之一的光盘的再现操作具有比具有非常高的反射率的反射率具有非常低的反射率的反射率的跟踪 一。

解决方案：主激光束照射光盘的所需轨迹。 一个和另一个子激光束通过跟随并在主激光束之前照射与期望轨道相邻的一个和另外的间隙部分。 基于所接收的主反射光和一个和另一个副反射光产生跟踪误差信号。 基于一个或另一个副反射光的光量的变化，检测主激光的照射位置到达记录的边界位置和未记录的边界位置。 纠正跟踪误差信号，而用主激光束照射具有极高反射率的另一个轨迹。 即使当主激光束的照射位置在数据未记录部分和数据记录部分上移位时，可以通过防止跟踪误差信号的振幅的变化来精确地控制跟踪。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2000011562A

公开(公告)日：2000-01-14

申请号：JP16754798

申请日：1998-06-15

Applicant: SONY CORP

Inventor： OONUKI YOSHIKAZU ,  ISHIOKA HIDEAKI ,  YADA HIROAKI

IPC: G11B21/10 ,  G11B7/095 ,  G11B19/06 ,  G11B19/247 ,  G11B19/28

Abstract: PROBLEM TO BE SOLVED: To improve a suppressing rate of external disturbance by synthesizing a sine wave generated from a sine wave generating means to supply it to an actuator driving means and making a recording/reproducing head follow up to the external disturbance synchronized to the rotation of a disk-like recording medium. SOLUTION: Servo pits inscribed on an optical disk 1 are read out by a pickup 2, and based on these data, tracking error signals are produced in a tracking error signal detector 4. The tracking error signals are made to AFC input signals and multiplied respectively by cosine wave data from a cosine wave table 93 and by sine wave data from a sine wave table 94 in multipliers 95, 96, then cumulatively added respectively in cumulating adders 99, 100 after appropriately amplified by amplifiers 97, 98. The cumulatively added values are multiplied by the cosine wave, sine wave data in multipliers 101, 102 and made to AFC output signals.