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公开(公告)号：JPH06282845A
公开(公告)日：1994-10-07
申请号：JP19343992
申请日：1992-06-26
Applicant: SONY CORP
Inventor： HIDA MINORU
Abstract: PURPOSE:To provide a method of recording and reproducing for an EXROM type optical disc which achieves hither density in the tangential direction and higher rate of transferring of the disc without interference between codes even when the length of a pit becomes small. CONSTITUTION:In an optical disc device which performs an exclusive ORing of pit data per track to form a pair track, a pit detection position with a laser beam LD is set at an edge of an adjacent pit to perform a quinary detection for increasing the density in the tangential direction. Data of a pair track ROM are recorded at positions shifted by 180 deg. from each other and reproduction signals quinary-coded at the edge parts of pits are detected by a clock doubling that in a normal state. Thus, a sum signal is used to detect pair tracks simultaneously.
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公开(公告)号：JPH05234254A
公开(公告)日：1993-09-10
申请号：JP3098092
申请日：1992-02-18
Applicant: SONY CORP
Inventor： HIDA MINORU
Abstract: PURPOSE:To reduce error occurrence probability by deciding a threshold level so as to always keep the maximum margin in the direction of amplitude even if a phase of a reproducing clock is deviated. CONSTITUTION:Reference data for deciding a threshold level is recorded in a disk 100. A reproducing RF signal from an optical head 2 is clamped for every segments in a clamping circuit 11, and converted to a digital signal in a A/D converter 12, also waveform equalization is performed in a equalizer 13 so as to approach a shape of a cosine filter adapted to PR (1, 1) and it is supplied to a data detecting circuit 14 adopting PR (1, 1). Levels SL and SH required for three values sampling in the detecting circuit 14 is decided in a threshold decision circuit 15. Plural signals which regulate amplitude direction of eye of an eye pattern are obtained from the reproduced RF signal corresponding to the reference data in the decision circuit 15, the level SL and SH are decided so as to locate at the center of eye.
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公开(公告)号：JPH04216343A
公开(公告)日：1992-08-06
申请号：JP41112490
申请日：1990-12-17
Applicant: SONY CORP
Inventor： HIDA MINORU , KAWAGUCHI KUNIO
IPC: G11B7/00 , G06N3/04 , G06N3/063 , G11B7/005 , G11B11/10 , G11B11/105 , G11B20/10 , H03H15/00 , H03H17/00 , H03H21/00 , H04B3/04
Abstract: PURPOSE:To enable an accurate reading and to improve the recording density by reproducing an RF signal with the use of a neural network. CONSTITUTION:The reproducing RF signal outputted from a head 34 is separated to an addition signal and a difference signal in a matrix circuit 35. The difference signal is subjected to A/D conversion by an A/D converter 47 and inputted to a read-out circuit 48. The output signal from the read-out circuit 48 is outputted to a host computer through a reading controller 38. In this case, the read-out circuit 48 is constituted of the neural network wherein prescribed coefficients are learned beforehand, and the coefficients capable of accurately reading out even in the case the pit size is varied due to heat accumulation, etc., are stored therein, and even the RF signal deformed to nonlinear type can be read out accurately.
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公开(公告)号：JPH04155663A
公开(公告)日：1992-05-28
申请号：JP27892390
申请日：1990-10-19
Applicant: SONY CORP
Inventor： HIDA MINORU
Abstract: PURPOSE:To simplify the circuitry by varying the frequency of clock for recording/reproducing data according to the track position. CONSTITUTION:When data is recorded or reproduced while rotating an optical disc 10 having sample servo format at a constant angular speed, a clock phi1 reproduced based on clock information recorded in a servo area fed from a reproducing circuit 30 is subjected to frequency conversion through a converting circuit 50 thus forming a data recording/reproducing clock phi2. On the other hand, the converting circuit 50 is controlled to vary the frequency of the data recording/reproducing channel clock phi2 according to the track position of a disc recording medium. Furthermore, a system controller 41 interrupts data recording for a predetermined time when the clock phi2 is varied.
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15.发明专利
公开(公告)号：JP2005259313A
公开(公告)日：2005-09-22
申请号：JP2004073237
申请日：2004-03-15
Inventor： FUJITA GORO , HIDA MINORU
IPC: G11B7/24 , G11B7/0045 , G11B7/007 , G11B7/26 , G11B20/10
CPC classification number: G11B7/24082 , G11B7/0053
Abstract: PROBLEM TO BE SOLVED: To obtain highly precise address detection against cross talks between adjacent recording tracks on a disk shaped recording medium having address information recorded by wobbling at least on a single side wall of the tracks. SOLUTION: For the FM modulated signals obtained by FM modulating the ADIP data after Bi-phase modulating them for example, one track is completed in a data bit unit, and the sync signals are made not to come close each other in the adjacent tracks. According to this arrangement, the number of waves of the wobble signals become the same between the adjacent tracks, and the phases of the wobble signals can be prevented from becoming opposite between the adjacent tracks. Thus, highly precise address detection can be maintained against cross talks. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：为了获得高精度的地址检测，以便在具有通过摆动至少在轨道的单个侧壁上记录的地址信息的盘形记录介质上的相邻记录轨道之间进行交叉谈话。 解决方案：对于通过对其调制ADIP数据进行二相调制后得到的FM调制信号，例如，在数据位单元中完成一个磁道，同步信号不会在 相邻轨道。 根据这种布置，摆动信号的波数在相邻轨道之间变得相同，并且可以防止摆动信号的相位在相邻轨道之间变得相反。 因此，可以保持高度精确的地址检测来防止交叉谈话。 版权所有（C）2005，JPO＆NCIPI
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Patent Agency Ranking
公开(公告)号：JP2004335034A
公开(公告)日：2004-11-25
申请号：JP2003132194
申请日：2003-05-09
Inventor： HIDA MINORU , FUKUSHIMA TAKASHI , KURITA KAZUHITO , ABE TSUGUHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a portable electronic apparatus equipped with a large display viewable of the whole still picture data, video data or the like at a time without scrolling the whole data. SOLUTION: The portable electronic apparatus is equipped with: an apparatus main body 11 in which a loading part 13 to load a disk cartridge 2 and whose principal plane part has a roughly similar size to the principal plane of the disk cartridge 2; an optical pickup 13b which is provided in the apparatus main body and reads the information recorded on the disk cartridge 2; a reproduction processing part 138 which performs the reproduction processing of the information signal read out from the cartridge 2 loaded in the loading part 13 with the optical pickup 13b; a display part 14 which is provided over roughly the entire area of the principal plane part of the equipment main body and which displays the visible data whose signal is processed in the reproduction processing part 138 according to the operation of the pickup 13b; and an operating part 15 which inputs an operatiing signal relevant to the reproducing operation to the cartridge 2 loaded in the loading part 13. COPYRIGHT: (C)2005,JPO&NCIPI
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公开(公告)号：JP2004087085A
公开(公告)日：2004-03-18
申请号：JP2003088324
申请日：2003-03-27
Inventor： HIDA MINORU , TERAOKA YOSHIYUKI , TANAKA FUJI , 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
CPC classification number: G11B11/10508 , G11B11/10515 , G11B11/10595 , G11B19/28 , G11B20/00086 , G11B20/10 , G11B20/1217 , G11B20/18 , G11B27/034 , G11B27/036 , G11B27/105 , G11B27/19 , G11B27/24 , G11B27/32 , G11B27/329 , G11B27/34 , G11B2020/1269 , G11B2020/1272 , G11B2220/20 , G11B2220/2529
Abstract: PROBLEM TO BE SOLVED: To provide an information recording apparatus in which a large capacity of data are recorded on and reproduced from a disk of a current MD system while making compatibility with the current MD. SOLUTION: A first magnetic layer 101 for recording information, a second magnetic layer 102 for adjusting an exchange coupling force and a third magnetic layer 103 for moving a magnetic wall of a recording mark to reproduce the information are laminated on a transparent substrate at least and magnetic hyper resolution technology is used to improve a recording density in a line recording direction. The apparatus is provided with, at least, a light source for emitting light beams near a wavelength of 780 nm, an optical head having an objective lens of which NA is approximately 0.45 for converging the light beams emitted form the light source and irradiating a magneto-optical recording medium therewith as a fine light spot, and a magnetic head for applying a magnetic field for recording to the magneto-optical recording medium. COPYRIGHT: (C)2004,JPO
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18.发明专利
公开(公告)号：JP2003179497A
公开(公告)日：2003-06-27
申请号：JP2001377598
申请日：2001-12-11
Applicant: SONY CORP
Inventor： NAKAGAWA TOSHIYUKI , OKAMURA SADANARI , HIDA MINORU
Abstract: PROBLEM TO BE SOLVED: To suppress enlargement of the circuit scale of a modulator. SOLUTION: When an input data row is supplied to a DSV control bit deciding section 31, a section 31 decides on the DSV control bit to be inserted into the input data row. When the input data row is supplied to the deciding section 31, the data row is simultaneously supplied to a delay section 32 and the section 32 supplies the data row to a decided-DSV control bit inserting section 33, after delaying the data row by a prescribed delay time. The inserting section 33 inserts the DSV control bit decided by means of the deciding section 31 into the input data row supplied from the delaying section 32 at a prescribed position and supplies the data row containing the inserted DSV control bit to a modulating section 34. The section 34 modulates the data row, containing the DSV control bit into a code row in accordance with a prescribed reduction rule (for example, 1, 7 PP modulation). COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2000268372A
公开(公告)日：2000-09-29
申请号：JP7157399
申请日：1999-03-17
Applicant: SONY CORP
Inventor： HIDA MINORU
Abstract: PROBLEM TO BE SOLVED: To enable a thread action to have high accuracy and to perform high-speed access by setting a thread leading an optical pickup and a thread motor for moving the thread, detecting the movement of the thread, increasing the driving voltage of the thread motor from a state where the thread stops, and decreasing the driving voltage when an output of a sensor changes. SOLUTION: The rotation of a thread motor 21 is transmitted to gears 30. A feed screw 31 is rotated with the number of revolutions converted by the gears 30, thereby, a thread 32, to which a magnetic head 16, an optical pickup 2 and the like are loaded, can be fed. An angle of rotation is detected by a combination of a rotary encoder 33 and an MR sensor 34 magnetized to the read screw 31. The angle of rotation indicates a feed amount of the thread 32 by the feed screw 31, and an accuracy of the angle is changed by the tap amount of the feed screw 31. The relationship of the angle of rotation and a starting voltage is learned beforehand and a zero point of a driving voltage is reset at every predetermined angle, so that linear control is made possible.
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公开(公告)号：JP2000020958A
公开(公告)日：2000-01-21
申请号：JP19059998
申请日：1998-07-06
Applicant: SONY CORP
Inventor： HIDA MINORU , OWA HIDEO
IPC: G11B7/00 , G11B7/0045 , G11B7/005 , G11B7/125
Abstract: PROBLEM TO BE SOLVED: To control laser power to be more optimal in real time. SOLUTION: A detection circuit 18 detects an asymmetric value of an RF signal and supplies this detection result to a semiconductor laser control circuit 19. Based on the detection result, the semiconductor laser control circuit 19 varies the recording power of semiconductor laser of an optical head 11 so that the asymmetric value is eliminated. The optical head 11 records the following block supplied via an MPEG encoder/decoder 14 and a recording circuit 17 on an optical disk 30, based on a setup of a laser beam by the semiconductor laser control circuit 19.
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