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    Method of reproducing information using a selected equalization coefficient for each signal
    11.
    发明授权
    Method of reproducing information using a selected equalization coefficient for each signal 有权
    使用所选择的每个信号的均衡系数再现信息的方法

    公开(公告)号：US06480447B1

    公开(公告)日：2002-11-12

    申请号：US09478343

    申请日：2000-01-06

    申请人： Kouichirou Wakabayashi ,  Hirofumi Sukeda

    发明人： Kouichirou Wakabayashi ,  Hirofumi Sukeda

    IPC分类号： G11B7005

    CPC分类号： G11B20/10009

    摘要： An information reproducing apparatus method includes the steps of radiating an optical spots to scan information marks recorded on tracks inside a predetermined information recording region, detecting an optical change of the information marks by this scanning operation, executing a signal processing for the reproducing signal so as to reduce inter-symbol interference of an interference amount that varies for each of the information marks, and reproducing the information corresponding to the information mark. The magnitude of the optical change due to the information mark is thereby detected, and a plurality of equalization coefficients used for an equalization processing are calculated for the magnitude of the optical change detected for each information mark. The inter-symbol interference is reduced on the basis of these equalization coefficients. In consequence, the inter-symbol interference can be reduced while the equalization coefficients are changed in accordance with the level of the reproducing signal.

    摘要翻译： 一种信息再现装置的方法包括以下步骤：发射光点以扫描记录在预定信息记录区域内的轨道上的信息标记，通过该扫描操作检测信息标记的光学变化，执行再现信号的信号处理，以便 以减少对于每个信息标记而变化的干扰量的符号间干扰，并且再现与信息标记相对应的信息。 由此检测出由于信息标记引起的光学变化的大小，并且针对每个信息标记检测到的光学变化的幅度来计算用于均衡处理的多个均衡系数。 基于这些均衡系数减小符号间干扰。 结果，可以根据再现信号的电平改变均衡系数，从而减小符号间干扰。

    Reproduction of optical information by one-beam optics with reduced crosstalk as recorded in multi-phases and multi-levels at staggered lattice points, and apparatus and recording medium therefor
    15.
    发明授权
    Reproduction of optical information by one-beam optics with reduced crosstalk as recorded in multi-phases and multi-levels at staggered lattice points, and apparatus and recording medium therefor 失效
    以交错格子点记录在多相和多级中记录的串扰减小的一光束光学器件再现光学信息，以及其装置和记录介质

    公开(公告)号：US5808988A

    公开(公告)日：1998-09-15

    申请号：US602569

    申请日：1996-02-14

    申请人： Takeshi Maeda ,  Kouichirou Wakabayashi ,  Hisataka Sugiyama

    发明人： Takeshi Maeda ,  Kouichirou Wakabayashi ,  Hisataka Sugiyama

    IPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B11/105 ,  G11B20/10 ,  G11B20/14 ,  G11B20/22 ,  G11B7/00

    CPC分类号： G11B20/10009 ,  G11B11/10515 ,  G11B11/10582 ,  G11B20/1496 ,  G11B7/005 ,  G11B7/00745 ,  G11B7/013 ,  G11B20/22

    摘要： Learning marks are recorded in a learning region preceding a data recording region of the track. The positions of information recording lattice points are staggered by one lattice point between two contiguous tracks. At reading of recorded information, a two-dimensional information leakage amount is detected by the reproduced signals from a learning mark preceding a target information recording lattice point on a track, and from the information recording lattice points immediately before and after the learning mark in question. The equalization coefficients are calculated from leakage amount thus obtained. The crosstalk present in a reproduced signal for the target lattice point is removed by using this equalization coefficients and a pair of reproduced signals from intermediate lattice points which are located immediately before and after the current lattice point and which are not used to record information marks. Inter-symbol interference left in the crosstalk-removed reproduced signal is further removed by use of the reproduced signals from a plurality of information recording lattice points which are located immediately before and after the target lattice point.

    摘要翻译： 学习标记被记录在轨道的数据记录区之前的学习区域中。 信息记录网格点的位置由两个相邻轨道之间的一个格点错开。 在读取所记录的信息时，二维信息泄漏量由来自轨道上的目标信息记录格点之前的学习标记的再现信号以及所述学习标记之前和之后的信息记录格点检测 。 从这样获得的泄漏量计算均衡系数。 通过使用来自位于当前格点之前和之后的中间格点的这种均衡系数和一对再现信号，并且不用于记录信息标记，去除存在于目标格点的再现信号中的串扰。 通过使用来自位于目标格点之前和之后的多个信息记录格子点的再现信号，进一步去除在去除串扰的重放信号中留下的符号间干扰。

    Optical information recording/reproducing method
    16.
    发明授权
    Optical information recording/reproducing method 失效
    光信息记录/再现方法

    公开(公告)号：US5491683A

    公开(公告)日：1996-02-13

    申请号：US360327

    申请日：1994-12-21

    申请人： Takeshi Maeda ,  Hisataka Sugiyama ,  Hirofumi Sukeda ,  Kouichirou Wakabayashi

    发明人： Takeshi Maeda ,  Hisataka Sugiyama ,  Hirofumi Sukeda ,  Kouichirou Wakabayashi

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/135 ,  G11B11/105

    CPC分类号： B82Y10/00 ,  G11B11/10504 ,  G11B11/10528 ,  G11B7/0045 ,  G11B7/1381 ,  G11B2007/0013

    摘要： An optical information recording/reproducing method includes that information is recorded on a rotary disk in an optically discriminative form, a light emitted from a light source is focused on the surface of the disk to form a light spot, the information is scanned with the light spot relative thereto in a rotating direction of the disk, and a reflection light or transmitting light from the disk is collected by an optical system to record or reproduce the information. An optically discriminative first information mark having a frequency higher than a spatial frequency resolvable by the optical system is recorded on the surface of the disk, an optically discriminative second information mark having a spatial frequency component higher than that resolvable by the optical system is overwrite-recorded on the first information mark, and a frequency component which is prepared from the first and second information marks and which is higher than the spatial frequency resolvable by the optical system is converted into a spatial frequency component detectable by the optical system.

    摘要翻译： 光信息记录/再现方法包括以光学上的区别形式将信息记录在转盘上，从光源发出的光聚焦在光盘表面上以形成光点，该信息用光 在盘的旋转方向上相对于其定位，并且通过光学系统收集来自盘的反射光或透射光以记录或再现信息。 具有高于由光学系统可分辨的空间频率的频率的光学鉴别第一信息标记被记录在盘的表面上，具有高于由光学系统可解析的空间频率分量的光学辨别性第二信息标记被覆盖 - 记录在第一信息标记上，并且从第一和第二信息标记准备并且高于由光学系统可解析的空间频率的频率分量被转换成由光学系统可检测的空间频率分量。

    Method of reproducing information with equalization coefficient for the reproduced information
    17.
    发明授权
    Method of reproducing information with equalization coefficient for the reproduced information 有权

    公开(公告)号：US07046595B2

    公开(公告)日：2006-05-16

    申请号：US10715387

    申请日：2003-11-19

    申请人： Kouichirou Wakabayashi ,  Hirofumi Sukeda

    发明人： Kouichirou Wakabayashi ,  Hirofumi Sukeda

    IPC分类号： G11B7/05

    CPC分类号： G11B20/10009

    摘要： A method of reproducing information by scanning information marks, disposed with a predetermined mark pitch therebetween and recorded on tracks inside a predetermined information recording region, by an optical spot. The method includes detecting the size of the optical change resulting from the information mark, calculating a plurality of equalization coefficients used for an equalization processing for the size of the optical change detected for each of the information marks, and reducing the inter-symbol interference on the basis of the equalization coefficients by the equalization processing. The equalization coefficient used for the equalization processing of the size of the optical change by a first information mark is greater than said equalization coefficient used for the equalization processing of the size of said optical change by a second information mark which is longer than the first information mark.

    Method of reproducing information with equalization for the reproduced information to reduce inter-symbol interference
    18.
    发明授权
    Method of reproducing information with equalization for the reproduced information to reduce inter-symbol interference 有权
    再现信息的再现信息的均衡方法，以减少符号间的干扰

    公开(公告)号：US06944105B2

    公开(公告)日：2005-09-13

    申请号：US10283143

    申请日：2002-10-30

    申请人： Kouichirou Wakabayashi ,  Hirofumi Sukeda

    发明人： Kouichirou Wakabayashi ,  Hirofumi Sukeda

    IPC分类号： G11B7/135 ,  G11B7/00 ,  G11B7/005 ,  G11B20/10

    CPC分类号： G11B20/10009

    摘要： A method of reproducing information by scanning information marks, disposed with a predetermined mark pitch therebetween and recorded on tracks inside a predetermined information recording region, by an optical spot. The method includes detecting the size of the optical change resulting from the information mark, calculating a plurality of equalization coefficients used for an equalization processing for the size of the optical change detected for each of the information marks, and reducing the inter-symbol interference on the basis of the equalization coefficients by the equalization processing. The equalization coefficient used for the equalization processing of the size of the optical change by a first information mark is greater than said equalization coefficient used for the equalization processing of the size of said optical change by a second information mark which is longer than the first information mark.

    摘要翻译： 通过扫描以预定的标记间距设置并通过光点记录在预定信息记录区域内的轨道上的信息标记来再现信息的方法。 该方法包括检测由信息标记产生的光学变化的大小，计算用于针对每个信息标记检测的光学变化的尺寸的均衡处理的多个均衡系数，并减少符号间干扰 通过均衡处理的均衡系数的基础。 用于通过第一信息标记对光学变化的尺寸的均衡处理的均衡系数大于用于通过比第一信息长的第二信息标记对所述光学变化的尺寸进行均衡处理的所述均衡系数 标记。