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    • 72. 发明授权
    • Optical magnetic disk with separate regions provided on it
    • 具有分开区域的光磁盘
    • US5247495A
    • 1993-09-21
    • US657819
    • 1991-02-20
    • Masahiro BirukawaNorio MiyatakeYasumori Hino
    • Masahiro BirukawaNorio MiyatakeYasumori Hino
    • G11B11/10G11B7/00G11B7/0055G11B7/007G11B7/30G11B11/105
    • G11B11/10597G11B11/10517G11B11/10528
    • A magneto-optical disc according to the present invention has separate regions located between mutually adjacent recording tracks. In the separate regions, magneto-optical signals are impossible to record or smaller than the recording tracks. Therefore, it is possible to maintain a low erasing power that is constant even when conditions such as off-tracking, defocusing and changes of operating temperature occur. The present invention provides a magneto-optical disc, further, which in a light modulating system restricts the recording domain so as to improve the number of times the disc can be rewritten, providing a magneto-optical disk that is highly compatible with different drives. Further, the magneto-optical disk according to the present invention is provided such that a residual signal is not caused if recording power during overwriting is lower than the previous recording power in a magnetic modulating system, further improving compatibility.
    • 根据本发明的磁光盘具有位于相互相邻的记录轨道之间的分离区域。 在单独的区域中,磁光信号不可能记录或小于记录轨道。 因此,即使在诸如偏离跟踪,散焦和工作温度的变化的条件出现的情况下,也可以保持不变的擦除功率。 本发明还提供一种磁光盘,其进一步在光调制系统中限制记录域,以便提高光盘可重写的次数,提供与不同驱动器高度兼容的磁光盘。 此外,根据本发明的磁光盘被提供为使得在重写期间的记录功率低于磁调制系统中的先前记录功率时不会引起残留信号,从而进一步提高兼容性。
    • 73. 发明授权
    • Magneto-optical disk unit compatible with different two types of
magneto-optical disks and a magnetic-field generator suitable thereof
    • 与不同的两种类型的磁光盘和适于其的磁场发生器兼容的磁光盘单元
    • US5202863A
    • 1993-04-13
    • US757461
    • 1991-09-10
    • Norio MiyatakeHidetsugu KawabataKiyoshi UchidaYasumori HinoTeruyuki TakizawaTohru Nakamura
    • Norio MiyatakeHidetsugu KawabataKiyoshi UchidaYasumori HinoTeruyuki TakizawaTohru Nakamura
    • G11B11/105G11B19/02G11B19/12
    • G11B19/12G11B11/10534G11B11/10552G11B11/1058G11B11/10597G11B19/02
    • A magneto-optical disk unit has a first magnetic-field generator for generating a magnetic field corresponding to a frequency in a recording signal frequency band and a second magnetic-field generator for generating DC magnetic fields of both north-seeking and south-seeking poles in a non-contact manner with a loaded magneto-optical disk. The first magnetic-field generator has a slider part for sliding over a loaded magneto-optical disk in a floating manner using an aerodynamic effect. The unit further has a transfer driver for moving the first and second magnetic-field generators in a direction parallel to the loaded magneto-optical disk and a rotary plate for vertically moving the first magnetic-field generator. The unit also has a disk judging circuit for judging whether the loaded magneto-optical disk is of a magnetic-field-modulation overwritable type (first type) or an erase-operation-required type (second type), and a controller for controlling the rotary plate to bring the first magnetic-field generator into contact with the loaded disk when this disk is of the first type and to keep it raised from the disk when this disk is of the second type. The second magnetic-field generator is used when the disk is judged to be of the second type.
    • 磁光盘单元具有用于产生对应于记录信号频带中的频率的磁场的第一磁场发生器和用于产生北向和北极两极的直流磁场的第二磁场发生器 以与负载的磁光盘非接触的方式。 第一磁场发生器具有用于使用空气动力学效应以浮动方式在加载的磁光盘上滑动的滑块部分。 该单元还具有用于使第一和第二磁场发生器沿平行于装载的磁光盘的方向移动的转移驱动器和用于垂直移动第一磁场发生器的旋转板。 该单元还具有用于判断装载的磁光盘是磁场调制可重写类型(第一类型)还是擦除操作需要类型(第二类型)的盘判断电路,以及控制器 旋转板,当该磁盘是第一类型时,使第一磁场发生器与装载的磁盘接触,并且当该磁盘是第二类型时将其保持从磁盘升起。 当盘被判断为第二种类型时,使用第二磁场发生器。
    • 74. 发明授权
    • Decoding apparatus and decoding method
    • 解码装置和解码方法
    • US09244760B2
    • 2016-01-26
    • US13824152
    • 2012-08-01
    • Keisuke FujimotoYasumori Hino
    • Keisuke FujimotoYasumori Hino
    • G11C29/00H03M13/00G06F11/10H03M13/11G11B20/18H03M13/41
    • G06F11/10G11B20/1833G11B2020/185G11B2220/2537H03M13/1111H03M13/1128H03M13/41
    • A control device inputs reliability information on the same data block a plurality of times into a reliability storage memory. A reliability generating device generates a reliability information by performing computation processing based on a stochastic computation by using reliability information generated in the previous cycle that has been saved in the reliability storage memory and reliability information generated in the present cycle, and saves the reliability information generated in the reliability storage memory when the decoding is performed by using reliability information on the data block the same as that in the previous cycle. A column processing computation device computes a column processing output value by using the reliability information generated and saved in the reliability storage memory and a row processing output value.
    • 控制装置将相同数据块上的可靠性信息多次输入到可靠性存储存储器中。 可靠性生成装置通过使用保存在可靠性存储存储器中的上一个循环中生成的可靠性信息和本循环中生成的可靠性信息,通过进行基于随机运算的计算处理来生成可靠性信息,并且保存生成的可靠性信息 在通过使用与前一周期相同的数据块上的可靠性信息来执行解码的可靠性存储存储器中。 列处理计算装置通过使用生成并保存在可靠性存储存储器中的可靠性信息和行处理输出值来计算列处理输出值。
    • 77. 发明授权
    • Method for inspecting optical information recording medium, inspection apparatus, optical information recording medium and recording method
    • 检查光信息记录介质的方法,检查装置,光信息记录介质和记录方法
    • US08335143B2
    • 2012-12-18
    • US13204384
    • 2011-08-05
    • Atsushi NakamuraKenji FujiuneYasumori Hino
    • Atsushi NakamuraKenji FujiuneYasumori Hino
    • G11B7/00
    • G11B20/10009G11B20/10046G11B20/1816G11B2220/218G11B2220/2541
    • A method for inspecting an optical information storage medium includes the steps of: irradiating the storage medium with a laser beam and rotating the medium by a constant linear velocity control technique by reference to the radial location at which the laser beam forms a spot on the medium; changing the rotational velocities according to the radial location on the medium between at least two linear velocities that include a first linear velocity Lv1 and a second linear velocity Lv2 higher than the first linear velocity Lv1; generating a focus error signal and/or a tracking error signal based on the light reflected from the medium; performing a focus control and/or a tracking control on the laser beam that irradiates the medium based on the focus and/or tracking error signal(s); and passing the branched outputs of control loops for the focus and/or tracking error signal(s) through predetermined types of frequency band-elimination filters for the focus and/or tracking error signal(s) to obtain residual errors of the focus and/or tracking error signal(s) and comparing the residual errors to predetermined reference values.
    • 一种用于检查光学信息存储介质的方法包括以下步骤:通过参考激光束在介质上形成点的径向位置,通过恒定的线速度控制技术照射存储介质和激光介质 ; 根据包括第一线速度Lv1和高于第一线速度Lv1的第二线速度Lv2的至少两个线性速度,根据介质上的径向位置改变旋转速度; 基于从介质反射的光产生聚焦误差信号和/或跟踪误差信号; 对基于焦点和/或跟踪误差信号照射介质的激光束进行聚焦控制和/或跟踪控制; 以及通过用于焦点和/或跟踪误差信号的预定类型的频带滤波器使用于聚焦和/或跟踪误差信号的控制回路的分支输出通过,以获得焦点和/ 或跟踪误差信号,并将剩余误差与预定参考值进行比较。