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1.发明专利
公开(公告)号：JP2005310329A
公开(公告)日：2005-11-04
申请号：JP2004129380
申请日：2004-04-26
Inventor： SHIOURA KUNIHIRO , MOROTOMI SHIRO , HIDA MINORU , MURAKAMI TOSHIYA , UMEZAWA ATSUSHI
CPC classification number: G11B7/24085 , G11B7/0901 , G11B7/0938 , G11B7/24038
Abstract: PROBLEM TO BE SOLVED: To enable TPP (Top hold Push-Pull) tracking to a bonded two-layered disk and to achieving power saving and circuit scale reduction. SOLUTION: An optical recording medium has a recording layer (a projecting pit recording layer) having projecting pits and a recording layer (a recessed pit recording layer) having recessed pits when viewed from a laser incident surface side as recording layers wherein data are recorded by a pit sequence. The depth of the pits is set in the range of λ/4.5 to λ/6. Thereby push-pull signal of required levels is obtained and tracking error signal is generated by the TPP system. The polarity of the tracking signal is switched according to whether the recording layer is the projecting pit recording layer or the recessed pit recording layer to deal with difference between projecting and recessed pits of respective layers. Thereby, the problem by a DPD (Differential Phase Detection) system is canceled. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract translation: 要解决的问题：使TPP（顶部保持推挽）跟踪到粘合的双层盘，并实现节电和电路规模的缩小。 解决方案：当从激光入射表面侧观察时，光记录介质具有具有突出凹坑的记录层（投影凹坑记录层）和具有凹坑的记录层（凹坑记录层），其中数据 由凹坑序列记录。 凹坑的深度设定在λ/ 4.5〜λ/ 6的范围内。 由此获得所需级别的推挽信号，并且TPP系统产生跟踪误差信号。 根据记录层是投影凹坑记录层还是凹坑记录层来切换跟踪信号的极性，以处理各层的凹坑和凹坑之间的差异。 因此，DPD（差分相位检测）系统的问题被取消。 版权所有（C）2006，JPO＆NCIPI
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公开(公告)号：JP2004326857A
公开(公告)日：2004-11-18
申请号：JP2003117026
申请日：2003-04-22
Inventor： WATANABE MAKOTO , MIYATA KAZUTOMO , OTA TERUYUKI , HIDA MINORU
IPC: G11B7/24 , G11B7/004 , G11B7/005 , G11B7/007 , G11B11/00 , G11B11/105 , G11B19/12 , G11B20/00 , G11B20/10
CPC classification number: G11B11/10597 , G11B7/00736 , G11B7/24082 , G11B7/24094 , G11B11/10515 , G11B11/10528 , G11B11/10584 , G11B19/122 , G11B20/00086 , G11B20/00268
Abstract: PROBLEM TO BE SOLVED: To provide a magneto-optical disk which has a small diameter and large capacity and can record and reproduce the disk discrimination information, its recording method, and a reproducing method. SOLUTION: This magneto-optical disk has, on its substrate, a main recording region in which first information is recorded, a sub-recording region which is formed at a more inner circumference side than the main recording region and in which second information including disk discrimination information is recorded, and a recording layer which is formed between the main recording region and the sub-recording region and including a buffer region in which third information is recorded. The second information is recorded by using a mark column formed in a stripe shape in the sub-recording region and the buffer region, wherein a plurality of marks constituting the mark column are a part where the a magnetization state of the recording layer is changed. The third information can be reproduced by a modulation signal of reflectance along the circumferential direction of the disk. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：提供具有小直径和大容量的磁光盘，并且可以记录和再现盘识别信息，其记录方法和再现方法。 解决方案：该磁光盘在其基板上具有记录有第一信息的主记录区域，形成在比主记录区域更内侧的副记录区域，其中第二记录区域 记录包括盘识别信息的信息，以及形成在主记录区域和副记录区域之间并包括其中记录有第三信息的缓冲区域的记录层。 通过使用在子记录区域和缓冲区域中形成为条形的标记列来记录第二信息，其中构成标记列的多个标记是记录层的磁化状态改变的部分。 可以通过沿盘的圆周方向的反射率的调制信号再现第三信息。 版权所有（C）2005，JPO＆NCIPI
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3.发明专利
公开(公告)号：JP2003099941A
公开(公告)日：2003-04-04
申请号：JP2001291162
申请日：2001-09-25
Applicant: SONY CORP
Inventor： TANAKA FUJI , TERAOKA YOSHIYUKI , ISHII TAMOTSU , HATTORI MASATO , HIDA MINORU
IPC: G11B20/10 , G11B7/004 , 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 groove is used for recording management information rewritable as the recording track, and so that a land track is not used. This makes the laser power specialized in a groove track in the management area settable, and makes the consideration about a cross light to the land track unneeded, that is produced due to recording on the groove 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 groove track is not be erased by the cross light due to recording on the land track.
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公开(公告)号：JP2002184055A
公开(公告)日：2002-06-28
申请号：JP2000375035
申请日：2000-12-08
Applicant: SONY CORP
Inventor： FUJITA GORO , SAKAMOTO TETSUHIRO , HIDA MINORU
IPC: G11B11/105 , G11B11/00 , G11B20/10
Abstract: PROBLEM TO BE SOLVED: To reduce a data signal from a magneto-optical disk with a high SN ratio, by utilizing a ghost signal obtained by the movement detection of a magnetic wall, while holding reproducing laser power at an optimum level. SOLUTION: Initially, laser power is controlled, so that the time delay of a ghost signal from a data signal becomes constant times (n) the length of a data detection clock. At this time, a laser power control part 30 searches for a clock of a small jitter quantity from among clocks generated on the basis of an RF signal. Then reproducing laser power is adjusted constant times n=5 as long as a clock closest to the phase delay quantity of a ghost generated in the equal temperature are of laser power, in which previously set signal characteristics becomes optimum. At the time, the control part 30 searches a peak of 5T amplitude, in a moving phase difference control pattern.
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公开(公告)号：JPH1131365A
公开(公告)日：1999-02-02
申请号：JP18418197
申请日：1997-07-09
Applicant: SONY CORP
Inventor： OTSUKA GAKUSHI , HIDA MINORU , SAKO YOICHIRO
Abstract: PROBLEM TO BE SOLVED: To enhance the efficiency of a recording/reproducing operation and the reliability of data and to increase the recording capacity of a recording medium by adding a correcting code having an error correcting capability concerning an address value together with the address value to address information to make the address information correctable. SOLUTION: An address area and a main data area are formed in one sector to divide the inside of the sector into areas physically and address information and main data are recorded in the areas. Then, an actual address value Ad and an error-correcting code ECC concerning the address value Ad are added as the address information. Moreover, the address information are expressed by wobbling a land or a groove becoming a data track and the address value Ad and the error-correcting code ECC concerning the address value Ad are added as the address information. Thus, even when the reading of the address becomes an NG, the read address value Ad can be restored to a correct value by an error corection.
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Patent Agency Ranking
公开(公告)号：JPH10208323A
公开(公告)日：1998-08-07
申请号：JP901497
申请日：1997-01-21
Applicant: SONY CORP
Inventor： HIDA MINORU , TOSAKA SUSUMU , NIWA YOSHIKATSU
IPC: G11B20/14 , G11B7/00 , G11B7/005 , G11B11/10 , G11B11/105
Abstract: PROBLEM TO BE SOLVED: To perform a demodulating process with a simple constitution that has one PLL(phase-locked loop) circuit. SOLUTION: Frequency modulation is imposed on address information ADM after biphase modulation, and the signal after this modulation is recorded as a groove wobble. A wobble signal SWB as a reproduction signal of this groove wobble is converted by a comparator 63 into a pulse signal PWB. The wobble signal SWB has four waves at the time of '1' and three waves at the time of '0' corresponding to one bit (biphase bit) of the address information ADM. A clock signal CK24 which has a frequency 24 times as high as a biphase bit frequency and is synchronized with the pulse signal PWB is obtained from a voltage-controlled oscillator which constitutes the PLL circuit. A processing circuit 67 outputs '0' when detecting an 8T pattern (T: cycle of CK24 ) successively three times from the pulse signal PWB and '1' when detecting a 6T pattern successively four timers from the pulse signal PWB to obtain the address signal ADM.
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公开(公告)号：JPH10208248A
公开(公告)日：1998-08-07
申请号：JP901297
申请日：1997-01-21
Applicant: SONY CORP
Inventor： HIDA MINORU , NIWA YOSHIKATSU
IPC: G11B11/10 , G11B7/00 , G11B7/005 , G11B7/007 , G11B11/105
Abstract: PROBLEM TO BE SOLVED: To obtain a clock signal precisely synchronized with the regenerative data. SOLUTION: A clock mark CM is preformatted on a boundary position between respective segments on a magneto-optical disk, and further, a fixed pattern area is provided corresponding to the boundary position of respective segments of a recording area. A 2T fixed pattern signal synchronized with the recording data is recorded on the fixed pattern area. At a data read-out time, a connection switch 83 is turned on, an addition signal between a low band component of a phase error signal from a phase comparator 79 and a high band component of the phase error signal from the phase comparator 81 is supplied to a VCO(voltage control oscillator) 77 as a control signal, and a data clock signal DCK phase controlled by the low band component of phase information provided in a clock mark regenerative signal SCM and the high band component of the phase information provided in a fixed pattern area regenerative signal SMO is obtained from the VCO 77. Even when the S/N of the regenerative signal SCM is bad, the clock signal DCK precisely synchronized with the regenerative data is obtained.
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公开(公告)号：JPH08115571A
公开(公告)日：1996-05-07
申请号：JP21791995
申请日：1995-08-25
Applicant: SONY CORP
Inventor： HIDA MINORU , FUJITA GORO , OTSUKA GAKUSHI , YAMAGAMI TAMOTSU
Abstract: PURPOSE: To provide the drive system for an optical disk which is large in capacity and high in performance by specifying the relation between the number of servo clocks, SCKseg, and that of data clocks, DCKseg, with M and N used to denote integers. CONSTITUTION: The optical disk is provided with two or more substantially concentrically formed tracks. In each track, servopits giving servo information to the disk drive are provided. Plural segments, each of which is composed of a servo area, and a data area both arranged in the same radial direction. For every plural continuing tracks, a zone is formed. A relation between the number of servo clocks per segment, SCKseg, and that of data clocks per segment, DCKseg, is so set as to satisfy an equation DCKseg=SCKseg.M/N, where M, N are integers. The disk is divided into plural zones of which the number of sectors is uniform.
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公开(公告)号：JPH0773653A
公开(公告)日：1995-03-17
申请号：JP23893993
申请日：1993-08-31
Applicant: SONY CORP
Inventor： HIDA MINORU , FUNABASHI TAKESHI
Abstract: PURPOSE:To reduce the load of a host computer at the time of data-processing such as a retrieving processing by selecting and outputtting reproduced user data based on the retrieval data. CONSTITUTION:At the time of reproducing an optical disk 2, the reproducing signal of an RF signal processing circuit 6 output whose signal level is changed by a reflected light quantity is binarized, then reproducing data is obtd. by demodulating it (7-2) at a data modulation decoding circuit 8 and further a reproducing position address is detected. At a system control circuit 9, control codes are issued to a servo control circuit 7 based on the detected address data and an optical pickup 5 is sought. When the reproducing data of the circuit 8 output is outputted to a buffer control circuit 10, the error of the reproducing data is processed by error detection correcting codesd to be reproduced with the reproducing data at an error correction circuit 11 and thus, reproducing is surely carried out. At this time, data unique to a vendor is retrieved by the circuit 9, optional user data is selected and outputted based on its result and a load on a host computer is reduced.
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公开(公告)号：JPH0757375A
公开(公告)日：1995-03-03
申请号：JP22524693
申请日：1993-08-17
Applicant: SONY CORP
Inventor： HIDA MINORU , FUNABASHI TAKESHI
Abstract: PURPOSE:To effectively evade an illegal copy by dividing the recording area into sectors, recording user data on each sector and also reproducing the user data based on discrimination data. CONSTITUTION:When the reproduced vendor ID is noncoincident with an ID for comparison, it is decided as the case that the read command of this optical disk is issued by the application program other than the program to process for retrieval of the optical disk 2. Thus, in the optical disk 1, the user data are outputted for the normal optical disk 2 only at the time when the read command is issued from the corresponding application program, thereby the illegal copy is prohibitted.
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