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31. 发明授权

US07474598B2 Optical reproducing device that controls the strength of the light beam during reproduction 失效
标题翻译：在再现期间控制光束的强度的光学再现装置
公开(公告)号：US07474598B2
公开(公告)日：2009-01-06
申请号：US10082466
申请日：2002-02-25
申请人： Tetsuya Okumura , Shigemi Maeda
发明人： Tetsuya Okumura , Shigemi Maeda
IPC分类号： G11B7/135
CPC分类号： G11B7/1267 , G11B7/005 , G11B7/00736 , G11B11/10515 , G11B11/10595
摘要： An optical reproducing device is provided with predetermined length mark signal measurement means which measures amplitude values of a 2T mark and an 8T mark, which are a short reproducing power control mark and a long reproducing power control marks, respectively, from information data recorded in an magneto-optical disk. Reproducing power of a light beam is controlled by a laser power control circuit, based on the amplitude values of the 2T mark and the 8T mark. The predetermined length mark signal measurement means detects a specific pattern including the 2T mark from a bit arrangement pattern of the information data, and measures the amplitude value of the 2T mark correponding only to the 2T mark included in the specific pattern. This structure can provide an optical reproducing device which can maintain the reproducing power at an optimum value and reduce the probability of reading errors, without reducing the utilization ratio of an optical recording medium.
摘要翻译：光学再现装置具有预定的长度标记信号测量装置，它们分别测量作为短再现功率控制标记和长再现功率控制标记的2T标记和8T标记的振幅值，该信号记录在磁光盘。基于2T标记和8T标记的振幅值，由激光功率控制电路控制光束的再现功率。预定长度标记信号测量装置从信息数据的位排列模式中检测包括2T标记的特定图案，并且仅测量与特定图案中包括的2T标记相对应的2T标记的振幅值。该结构可以提供一种光学再现装置，其可以将再现功率保持在最佳值，并且降低读取错误的可能性，而不降低光学记录介质的利用率。

32. 发明授权

US07061849B1 Recording method of optical disk, optical disk recording apparatus, optical disk reproducing apparatus and optical disk 失效
标题翻译：光盘的记录方法，光盘记录装置，光盘再现装置和光盘
公开(公告)号：US07061849B1
公开(公告)日：2006-06-13
申请号：US09721469
申请日：2000-11-22
申请人： Takeshi Yamaguchi , Shigemi Maeda
发明人： Takeshi Yamaguchi , Shigemi Maeda
IPC分类号： G11B5/76
CPC分类号： H03M13/2921 , G11B20/1217 , G11B20/1833 , H03M13/15
摘要： In a recording method for an optical disk, an optical disk is used, in which concave and convex areas formed as concave and convex sections on the disk substrate are arranged along a track with constant intervals and a recording area for recording data of a predetermined number of units is placed between the concave and convex areas arranged with constant intervals. Upon recording information on this optical disk, a two-dimensional array is formed by adding addition data to input data, a first encoding parity is added to the two dimensional array by carrying out a first encoding process that forms a code sequence by using a data alignment in a diagonal direction, and a second encoding parity is added to the resulting two dimensional array by carrying out a second encoding process that forms a code sequence by using a data alignment in a row direction so that a second two dimensional array is formed. Then, data is successively recorded in the row direction. With this arrangement, it is possible to reduce the occurrence of an incorrectable error in the optical disk in which the recording areas are placed along the track with constant intervals.
摘要翻译：在光盘的记录方法中，使用光盘，其中在盘基片上形成为凹凸区域的凹凸区域沿着具有恒定间隔的轨迹布置，并且记录区域用于记录预定数量的数据的单位放置在以恒定间隔排列的凹凸区域之间。在该光盘上记录信息时，通过将附加数据附加到输入数据来形成二维阵列，通过使用数据来形成代码序列的第一编码处理，将第一编码奇偶校验添加到二维阵列通过执行通过使用行方向上的数据对齐形成代码序列的第二编码处理，从而形成第二二维阵列，从而将对第二编码奇偶校验添加到所得二维阵列中。然后，数据依次记录在行方向上。利用这种布置，可以减少沿着轨道以恒定间隔放置记录区域的光盘中出现不正确的误差。

33. 发明授权

US06751173B1 Optical disk and optical disk apparatus 失效
标题翻译：光盘和光盘设备
公开(公告)号：US06751173B1
公开(公告)日：2004-06-15
申请号：US09560613
申请日：2000-04-26
申请人： Shigemi Maeda
发明人： Shigemi Maeda
IPC分类号： G11B700
CPC分类号： G11B20/1258 , G11B7/0037 , G11B7/00745 , G11B11/10502 , G11B11/10584 , G11B27/19 , G11B27/3027 , G11B2020/1232 , G11B2020/1267 , G11B2020/1287 , G11B2220/2525 , G11B2220/2562
摘要： In order to provide an optical disk of a small radius suitably used in recording/reproducing data at a high density and an optical disk apparatus capable of according/reproducing information into/from such an optical disk, the optical disk of the present invention uses both the grooves and lands as recording tracks. each recording track is divided into a plurality of sectors each including an address segments ASG 0 and ASG 1, and data segments DSG 0-DSG 52. The address segment 0 (ASG 0) and address segment 1 (ASG 1) respectively have wobbled areas in the opposite side walls, by which the address information is recorded. The data segments are non-wobbled DC grooves. Further, each segment is provided with a clock mark.
摘要翻译：为了提供适于用于高密度地记录/再现数据的小半径的光盘以及能够将信息从这种光盘进行/再现的光盘装置，本发明的光盘同时使用凹槽和平台作为记录轨道。每个记录磁道被分成多个扇区，每个扇区各自包括地址段ASG 0和ASG 1，以及数据段DSG 0-DSG 52.地址段0（ASG 0）和地址段1（ASG 1）分别具有摆动区域在相对的侧壁上，通过该墙壁记录地址信息。数据段是非摆动DC槽。此外，每个段都设置有时钟标记。

34. 发明授权

US06600715B2 Optical reproducing device and control method thereof 有权
公开(公告)号：US06600715B2
公开(公告)日：2003-07-29
申请号：US09955827
申请日：2001-09-19
申请人： Tetsuya Okumura , Shigemi Maeda
发明人： Tetsuya Okumura , Shigemi Maeda
IPC分类号： G11B724
CPC分类号： G11B7/126 , G11B11/10515 , G11B11/10595 , G11B20/10481 , G11B20/1816 , G11B27/36 , G11B2220/216 , G11B2220/2525 , G11B2220/2562
摘要： In an optical reproducing device in accordance with the present invention, based on an error rate used in a test read for determining an optimal reproducing power, the value of an error rate corresponding to the maximum burst error which can be corrected by an error correction circuit is obtained. With this structure, an error caused when reproducing power deviates from the optimal reproducing power determined by the test read due to an control error can be corrected by the error detection circuit.

35. 发明授权

US06327240B1 Optical disc and optical disc drive 失效
标题翻译：光盘和光盘驱动器
公开(公告)号：US06327240B1
公开(公告)日：2001-12-04
申请号：US09100406
申请日：1998-06-19
申请人： Minoru Tobita , Shigemi Maeda , Toshiaki Hioki , Michio Matsuura
发明人： Minoru Tobita , Shigemi Maeda , Toshiaki Hioki , Michio Matsuura
IPC分类号： G11B724
CPC分类号： G11B7/00745 , G11B7/007 , G11B7/00718 , G11B7/0938 , G11B7/0956 , G11B11/10515 , G11B11/10582 , G11B27/19 , G11B27/3027 , G11B2220/20
摘要： An optical disc and an optical disc drive for the optical disc are provided which are suitable for recording data with a high density. The optical disc D uses both lands and grooves as recording tracks. Each of the tracks consists of one address segment and forty five data segments. The address segment is wobbled at one side thereof. Each of the data segments is a DC groove. The address segment records an address information including a sync signal, frame address, track address and CRC, a tilt pattern and a clock mark. The clock mark is adapted to reflect laser beam in one amount before the mark and in another amount after the mark. The tilt pattern has a different track pitch from those in other areas. The data segments record data magneto-optically.
摘要翻译：提供一种用于光盘的光盘和光盘驱动器，其适合于高密度地记录数据。光盘D使用焊盘和凹槽作为记录轨道。每个轨道由一个地址段和四十五个数据段组成。地址段在其一侧摆动。每个数据段都是一个直流槽。地址段记录包括同步信号，帧地址，轨道地址和CRC的地址信息，倾斜图案和时钟标记。时钟标记适于在标记之前反射一个量的激光束，并在标记之后反射另一个量。倾斜图案具有与其他区域不同的轨道间距。数据段磁光记录数据。

36. 发明授权

US6125085A Optical recording method and device for optimally controlling the width of the recording marks 失效
标题翻译：用于最佳地控制记录标记宽度的光记录方法和装置
公开(公告)号：US6125085A
公开(公告)日：2000-09-26
申请号：US108472
申请日：1998-07-01
申请人： Hiroshi Fuji , Tetsuya Okumura , Shigemi Maeda
发明人： Hiroshi Fuji , Tetsuya Okumura , Shigemi Maeda
IPC分类号： G11B7/007 , G11B7/013 , G11B7/125 , G11B11/105 , G11B11/00
CPC分类号： G11B7/126 , G11B11/1053 , G11B11/10595 , G11B7/007 , G11B7/24085
摘要： A method and apparatus are provided for optimally controlling the width of recording marks formed by a light beam on an optical recording medium in an optical recording apparatus. The method is accomplished by selecting and storing in a storage device a predetermined optimal read signal value, and then setting a plurality of selectable predetermined recording conditions in the optical recording apparatus. These conditions differ from one another in the quantity of light in the light beam, or in the strength of an external magnetic field. In the optical recording apparatus, a set of first test patterns then are recorded by the light beam on separate first tracks of the optical recording medium under each of the predetermined conditions. Similarly, a second test track is recorded onto the optical recording medium under the same predetermined conditions adjacent to each of the first test tracks. The first test tracks are thereafter read by the optical recording apparatus, and the amplitude of the read signals is stored in the storage device, along with an indication of the predetermined recording signal condition under which it was generated. Finally, using a comparison device, the stored signal quantities are compared to the predetermined optimal read signal value. The optimal one of the predetermined recording conditions to be used by the optical recording apparatus is determined to be the condition associated with the one of the stored signals that most closely approximates the predetermined optimal signal value.
摘要翻译：提供了一种方法和装置，用于最佳地控制光记录装置中的光记录介质上由光束形成的记录标记的宽度。该方法通过在存储装置中选择和存储预定的最佳读取信号值，然后在光学记录装置中设置多个可选择的预定记录条件来实现。这些条件在光束中的光量或外部磁场的强度彼此不同。在光学记录装置中，在每个预定条件下，将一组第一测试图案由光束记录在光学记录介质的分开的第一轨道上。类似地，在与每个第一测试轨道相邻的相同的预定条件下，将第二测试轨迹记录在光学记录介质上。随后由光学记录装置读取第一测试轨迹，并将读出的信号的幅度与其产生的预定记录信号条件的指示一起存储在存储装置中。最后，使用比较装置，将所存储的信号量与预定的最佳读取信号值进行比较。将由光学记录装置使用的预定记录条件中的最佳一个确定为与最接近预定最佳信号值的存储信号之一相关联的条件。

37. 发明授权

US6055223A Optical memory apparatus 失效
标题翻译：光存储装置
公开(公告)号：US6055223A
公开(公告)日：2000-04-25
申请号：US8581
申请日：1998-01-16
申请人： Kenji Ohta , Yoshikazu Fujii , Tetuya Inui , Toshihisa Deguchi , Shigemi Maeda
发明人： Kenji Ohta , Yoshikazu Fujii , Tetuya Inui , Toshihisa Deguchi , Shigemi Maeda
IPC分类号： G11B7/007 , G11B7/013 , G11B7/09 , G11B7/24 , G11B11/10 , G11B11/105
CPC分类号： G11B11/10597 , G11B11/10563 , G11B11/10565 , G11B11/10578 , G11B11/10582 , G11B11/10584 , G11B7/0938 , G11B7/24 , G11B7/24085 , G11B7/007
摘要： An optical memory element includes a guide track groove portion and address signal pit portion for indicating the address of the guide track groove. The address signal pit portion has a pit width narrower than the groove width of the guide track groove portion.
摘要翻译：光学存储元件包括用于指示导轨槽的地址的导轨槽部分和地址信号凹坑部分。地址信号凹坑部具有比导轨槽部的槽宽窄的凹坑宽度。

38. 发明授权

US5434829A Information reproducing apparatus for properly synchronizing the reproducing of recorded information 失效
标题翻译：用于正确地同步记录信息的再现的信息再现装置
公开(公告)号：US5434829A
公开(公告)日：1995-07-18
申请号：US78003
申请日：1993-06-15
申请人： Shigemi Maeda , Tomiyuki Numata , Kunio Kojima
发明人： Shigemi Maeda , Tomiyuki Numata , Kunio Kojima
IPC分类号： G11B7/00 , G11B7/005 , G11B20/10 , G11B20/14
CPC分类号： G11B20/10 , G11B20/1403
摘要： An information reproducing apparatus has (1) a reference signal generating circuit for generating a first reference signal corresponding to reproduced signal of the main information; (2) a first switching circuit for selecting one of the reproduced signal and the first reference signal; and (3) a controller, which generates a selection instructing signal, for controlling such that the reproduced signal is selected during reproducing of the main information recorded area while the first reference signal is selected during reproducing of the main information unrecorded area. With the arrangement, when the main information unrecorded area is reproduced, the clock for carrying out the reproducing of main information is synchronized with the first reference signal which corresponds to the reproduced signal. So, when the reproducing area is changed from the main information unrecorded area to the main information recorded area, the synchronizing with the reproduced signal is carried out in a short time, thereby improving the reliability of the reproducing process.
摘要翻译：信息再现装置具有：（1）参考信号发生电路，用于产生对应于主信息的再现信号的第一参考信号; （2）用于选择再现信号和第一参考信号之一的第一切换电路; 以及（3）产生选择指示信号的控制器，用于在再现主信息未记录区域期间选择第一参考信号时在主信息记录区域的再现期间选择重放信号。利用这种布置，当主信息未记录区域被再现时，用于执行主信息再现的时钟与对应于再现信号的第一参考信号同步。因此，当再现区域从主信息未记录区域改变到主信息记录区域时，与再现信号同步在短时间内进行，从而提高再现处理的可靠性。

39. 发明授权

US5182741A Optical disk recording/reproducing device utilizing a constant angular velocity method with a constant linear velocity formatted optical disk 失效
标题翻译：使用具有恒定线性速度形成光盘的恒定角速度方法的光盘记录/再现装置
公开(公告)号：US5182741A
公开(公告)日：1993-01-26
申请号：US568483
申请日：1990-08-16
申请人： Shigemi Maeda , Toshihisa Deguchi , Shigeo Terashima
发明人： Shigemi Maeda , Toshihisa Deguchi , Shigeo Terashima
IPC分类号： G11B7/0037 , G11B7/0045 , G11B11/105 , G11B19/02 , G11B19/24 , G11B19/28
CPC分类号： G11B19/02 , G11B11/10504 , G11B11/10595 , G11B19/24 , G11B19/28 , G11B7/0037 , G11B7/0045
摘要： An optical disk recording/reproducing device for recording or reproducing information on or from an optical disk while rotatively driving the optical disk at a constant angular velocity. The disk has pre-recorded information cyclically formed along a track so as to provide rotation control at a constant linear velocity. The device, which includes a clock generating circuit for generating a clock signal for recording or reproducing in accordance with a recording frequency of the pre-recorded information derived from signals reproduced by an optical head, is designed to perform recording or reproducing operations with a recording frequency according to the clock signal. The device further includes a magnetic filed control circuit and a recording light power control circuit whereby a magnetic field and light power to be applied to the optical disk is varied according to the recording frequency during recording operations.

40. 发明授权

US5005165A Method for managing information on a storage media without losing information due to effects 失效
标题翻译：用于管理存储介质上的信息而不会因为影响而丢失信息的方法
公开(公告)号：US5005165A
公开(公告)日：1991-04-02
申请号：US284328
申请日：1988-12-14
申请人： Toshihiro Yamanaka , Shigemi Maeda , Nobuyuki Horie
发明人： Toshihiro Yamanaka , Shigemi Maeda , Nobuyuki Horie
IPC分类号： G11B20/10 , G11B20/12 , G11B20/18
CPC分类号： G11B20/1883 , G11B2220/20
摘要： A magneto-optic storage media is provided with two defect information blocks for storing information concerning a defect. At the time of reproduction, both the blocks are read, and it is determined whether or not the reading operation is normal. If the reading operations of both the blocks are normal, it is determined which of the respective numbers= of registrations of the information concerning a defect stored in both the blocks is larger so that the block in which the number of registrations is larger is utilized. Then, the defect information in the block which was not employed is updated and registered with the defect information. if the defect information is not registered, the block is switch so that an updating and registering operation can be executed again.

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