公开(公告)号：US07636287B2

公开(公告)日：2009-12-22

申请号：US10822374

申请日：2004-04-12

申请人： Shuichi Ohkubo ,  Hiromi Honma ,  Masatsugu Ogawa ,  Masaki Nakano ,  Toshiaki Iwanaga ,  Yutaka Kashihara ,  Yuji Nagai ,  Akihito Ogawa

发明人： Shuichi Ohkubo ,  Hiromi Honma ,  Masatsugu Ogawa ,  Masaki Nakano ,  Toshiaki Iwanaga ,  Yutaka Kashihara ,  Yuji Nagai ,  Akihito Ogawa

IPC分类号： G11B7/005 ,  G11B7/00

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10296 ,  G11B20/10481 ,  G11B2020/1288 ,  G11B2220/2541

摘要： Reproduced signals are equalized by the least square technique by using a predetermined number of data samples binarized by a Viterbi decoder. Even when data written on an optical disk is unknown, the data can be equalized in a stable manner and can be reproduced at a low error rate without instability factors such as divergence due to interference.

摘要翻译： 通过使用由维特比解码器二值化的预定数量的数据样本，通过最小二乘法来再现信号。 即使在光盘上写入的数据未知的情况下，数据也可以以稳定的方式进行均衡，并且能够以低错误率再现，而不会引起由于干扰引起的发散等不稳定因素。

公开(公告)号：US07184381B2

公开(公告)日：2007-02-27

申请号：US10736572

申请日：2003-12-17

申请人： Shuichi Ohkubo ,  Hiromi Honma ,  Masatsugu Ogawa ,  Masaki Nakano ,  Toshiaki Iwanaga ,  Yutaka Kashihara ,  Yuuji Nagai

发明人： Shuichi Ohkubo ,  Hiromi Honma ,  Masatsugu Ogawa ,  Masaki Nakano ,  Toshiaki Iwanaga ,  Yutaka Kashihara ,  Yuuji Nagai

IPC分类号： G11B5/09

CPC分类号： G11B20/10009 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10296 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/218

摘要： In order to evaluate the quality of a signal recorded on an optical recording medium, a target signal is obtained based on a predetermined data string and a predetermined partial response characteristic, and for each clock cycle, an equalization error is calculated that is a difference between the target signal and a signal reproduced each clock cycle. Further, the product of the equalization errors calculated at different times is obtained, and based on the obtained product, the quality of a signal is evaluated.

摘要翻译： 为了评估记录在光学记录介质上的信号的质量，基于预定数据串和预定的部分响应特性获得目标信号，并且对于每个时钟周期，计算均衡误差，该均衡误差是 目标信号和每个时钟周期再生的信号。 此外，获得在不同时间计算的均衡误差的乘积，并且基于获得的乘积来评估信号的质量。

公开(公告)号：US20050270939A1

公开(公告)日：2005-12-08

申请号：US11143996

申请日：2005-06-03

申请人： Yutaka Kashihara ,  Akihito Ogawa ,  Naoki Morishita ,  Masaki Nakano ,  Masatsugu Ogawa ,  Shuichi Ookubo ,  Toshiaki Iwanaga

发明人： Yutaka Kashihara ,  Akihito Ogawa ,  Naoki Morishita ,  Masaki Nakano ,  Masatsugu Ogawa ,  Shuichi Ookubo ,  Toshiaki Iwanaga

IPC分类号： G11B7/0045 ,  G11B5/09 ,  G11B7/004 ,  G11B7/125 ,  G11B7/24

CPC分类号： G11B7/00456 ,  G11B7/1263 ,  G11B7/1267 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10481 ,  G11B2220/2537

摘要： In an optical disk system using a PRML identification system, a method for deriving an optimum recording wave in a short period of time is provided. Parameters of the recording wave are adjusted by using an evaluation value obtained by a signal evaluation method which is suitable for the PRML identification system as an index. In this case, as a parameter adjusting method, a plurality of adjusting methods are utilized.

摘要翻译： 在使用PRML识别系统的光盘系统中，提供了用于在短时间内导出最佳记录波的方法。 通过使用通过适合于PRML识别系统的信号评估方法获得的评估值作为指标来调整记录波的参数。 在这种情况下，作为参数调整方法，利用多种调整方法。

公开(公告)号：US07471601B2

公开(公告)日：2008-12-30

申请号：US11143996

申请日：2005-06-03

申请人： Yutaka Kashihara ,  Akihito Ogawa ,  Naoki Morishita ,  Masaki Nakano ,  Masatsugu Ogawa ,  Shuichi Ookubo ,  Toshiaki Iwanaga

发明人： Yutaka Kashihara ,  Akihito Ogawa ,  Naoki Morishita ,  Masaki Nakano ,  Masatsugu Ogawa ,  Shuichi Ookubo ,  Toshiaki Iwanaga

IPC分类号： G11B7/00

CPC分类号： G11B7/00456 ,  G11B7/1263 ,  G11B7/1267 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10481 ,  G11B2220/2537

摘要： In an optical disk system using a PRML identification system, a method for deriving an optimum recording wave in a short period of time is provided. Parameters of the recording wave are adjusted by using an evaluation value obtained by a signal evaluation method which is suitable for the PRML identification system as an index. In this case, as a parameter adjusting method, a plurality of adjusting methods are utilized.

摘要翻译： 在使用PRML识别系统的光盘系统中，提供了用于在短时间内导出最佳记录波的方法。 通过使用通过适合于PRML识别系统的信号评估方法获得的评估值作为指标来调整记录波的参数。 在这种情况下，作为参数调整方法，利用多种调整方法。

公开(公告)号：US07428203B2

公开(公告)日：2008-09-23

申请号：US10763247

申请日：2004-01-26

申请人： Yutaka Kashihara ,  Yuji Nagai ,  Shuichi Ookubo ,  Masatsugu Ogawa ,  Masaki Nakano ,  Toshiaki Iwanaga

发明人： Yutaka Kashihara ,  Yuji Nagai ,  Shuichi Ookubo ,  Masatsugu Ogawa ,  Masaki Nakano ,  Toshiaki Iwanaga

IPC分类号： G11B20/18

CPC分类号： G11B20/10101 ,  G11B7/0062 ,  G11B20/10009 ,  G11B20/10055 ,  G11B20/10111 ,  G11B20/1816

摘要： Reproduction signals include patterns for which recognition errors are likely. With respect to such patterns, probable error patterns are prepared. Tables showing correct patterns and error patterns are prepared, and evaluation values accurately representing signal quality are calculated. In an apparatus using a PRML method, discrimination data and a plurality of predetermined bit sequence pairs are examined to detect matching. A bit sequence and corresponding two ideal responses are calculated. Euclidean distances between the two ideal responses and equalization signals are obtained, and the difference between the Euclidean distances is further obtained. A quality evaluation value of a reproduction signal is calculated based on a mean value, a standard deviation, an appearance probability of the predetermined bit sequence, and a Hamming distance between the predetermined bit sequence pairs.

摘要翻译： 繁殖信号包括识别错误可能的模式。 关于这种模式，准备可能的错误模式。 准备显示正确图案和错误图案的表格，并计算准确表示信号质量的评价值。 在使用PRML方法的装置中，检查鉴别数据和多个预定位序列对以检测匹配。 计算一个位序列和相应的两个理想响应。 获得两个理想响应和均衡信号之间的欧氏距离，并进一步获得欧氏距离之间的差异。 基于平均值，标准偏差，预定比特序列的出现概率以及预定比特序列对之间的汉明距离来计算再现信号的质量评估值。

公开(公告)号：US20100002554A1

公开(公告)日：2010-01-07

申请号：US12518150

申请日：2007-12-05

申请人： Masaki Nakano ,  Masatsugu Ogawa ,  Shuichi Ohkubo

发明人： Masaki Nakano ,  Masatsugu Ogawa ,  Shuichi Ohkubo

IPC分类号： G11B7/00

CPC分类号： G11B19/125 ,  G11B7/0053 ,  G11B7/00736 ,  G11B7/00745 ,  G11B2007/0006

摘要： An optical disk device includes an optical head unit, a drive means and a recording surface state determination means, and determines the type of an optical disk based on a state of the information recording surface. The information recording surface includes a management region on which management information is recorded and formed by a guiding groove or a prepit sequence and a data recording region on which a user data is recorded and on which a track formed by a guiding groove or a prepit sequence. The optical head unit irradiates a focused beam onto the information recording surface of an optical disk which rotates. The drive means drives to move the focused beam along a radial direction of the optical disk by driving the optical head unit. The recording surface state determination means determines a state of the information recording surface based on a reflected light of the focused beam. The optical disk device determines the type of the optical disk based on a state of the information recording surface in a determination region being set to straddle between a management region and the data recording region.

摘要翻译： 光盘装置包括光头单元，驱动装置和记录表面状态确定装置，并且基于信息记录表面的状态来确定光盘的类型。 信息记录表面包括管理区域，管理信息由导槽或预处理序列记录和形成，并且在其上记录用户数据的数据记录区域，并且由引导槽或预处理序列形成的轨道 。 光头单元将聚焦光束照射到旋转的光盘的信息记录表面上。 驱动装置通过驱动光头单元来驱动聚焦光束沿着光盘的径向方向移动。 记录表面状态确定装置基于聚焦光束的反射光来确定信息记录表面的状态。 光盘装置根据设置在管理区域和数据记录区域之间的确定区域中的信息记录表面的状态来确定光盘的类型。

公开(公告)号：US20100157749A1

公开(公告)日：2010-06-24

申请号：US12087880

申请日：2007-01-17

申请人： Masatsugu Ogawa ,  Shuichi Ohkubo

发明人： Masatsugu Ogawa ,  Shuichi Ohkubo

IPC分类号： G11B7/00 ,  G11B20/00

CPC分类号： G11B7/094 ,  G11B7/0945 ,  G11B20/10009 ,  G11B20/10111 ,  G11B20/1012 ,  G11B20/10481 ,  G11B2220/2537

摘要： In a track offset adjusting method of an information recording medium, data are recorded onto first and second tracks of an information recording medium. No data are recorded on at least one of tracks adjacent to each of the first and second tracks. After the data recording onto the first and second tracks, data are recorded onto the third track adjacent to the inner circumferential side of the first track and onto a fourth track adjacent to the outer circumferential side of the second track. Thereafter, reproduction signal qualities of the first and second tracks are calculated on the basis of reproduction signals obtained by reproducing the data recorded on said first and second tracks. The track offset is adjusted on the basis of the reproduction signal qualities of the first and second tracks.

摘要翻译： 在信息记录介质的磁道偏移调整方法中，将数据记录在信息记录介质的第一和第二磁迹上。 在与第一和第二轨道中的每一个相邻的轨道中的至少一个轨道上不记录数据。 在将数据记录到第一和第二轨道之后，将数据记录在与第一轨道的内周侧相邻的第三轨道上，并且记录到与第二轨道的外周侧相邻的第四轨道上。 此后，基于通过再现记录在所述第一和第二磁道上的数据而获得的再现信号来计算第一和第二磁道的再现信号质量。 基于第一和第二轨道的再现信号质量来调整轨道偏移。

公开(公告)号：US20080031116A1

公开(公告)日：2008-02-07

申请号：US11882493

申请日：2007-08-02

申请人： Masatsugu Ogawa ,  Yutaka Yamanaka ,  Shuichi Ohkubo

发明人： Masatsugu Ogawa ,  Yutaka Yamanaka ,  Shuichi Ohkubo

IPC分类号： G11B7/26 ,  G11B7/00

CPC分类号： G11B7/08505 ,  G11B7/00736 ,  G11B20/10 ,  G11B27/32 ,  G11B2007/0013 ,  G11B2020/10861 ,  G11B2020/10916 ,  G11B2020/1267 ,  G11B2020/1278 ,  G11B2220/216 ,  G11B2220/235 ,  G11B2220/237 ,  G11B2220/2579

摘要： A recording method of an information recording medium includes: (a) storing management information; (b) reading out the management information; and (c) recording. The information recording medium has two recording layers. A first recording layer is placed nearer to a source of a laser and a recording direction thereof is from the inner side to the outer side of the information recording medium. A recording direction of a second recording layer is from the outer side to the inner side. In the (a) storing, management information indicating a recording status of the information recording medium is recorded in a management information area of the information recording medium. In (b) reading out, the management information is read out from the management information area. In (c) recording, recording processing is performed by skipping a part of an area based on the management information.

摘要翻译： 信息记录介质的记录方法包括：（a）存储管理信息; （b）阅读管理资料; 和（c）记录。 信息记录介质具有两个记录层。 第一记录层被放置得更靠近激光源并且其记录方向是从信息记录介质的内侧到外侧。 第二记录层的记录方向是从外侧到内侧。 在（a）存储中，指示信息记录介质的记录状态的管理信息被记录在信息记录介质的管理信息区中。 在（b）读出中，从管理信息区域读出管理信息。 在（c）记录中，通过基于管理信息跳过一部分区域来执行记录处理。

公开(公告)号：US07151642B2

公开(公告)日：2006-12-19

申请号：US10974567

申请日：2004-10-27

申请人： Shuichi Ohkubo ,  Masatsugu Ogawa

发明人： Shuichi Ohkubo ,  Masatsugu Ogawa

IPC分类号： G11B5/035 ,  G11B5/09 ,  H03H7/30

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  H04L25/03038

摘要： An information playback apparatus includes a first FIR filter, ideal signal generator, weighted equalization error calculator, and coefficient calculator. The first FIR filter generates an equalized waveform by equalizing, to a partial response waveform, a playback data string obtained by playing back a recorded signal recorded on an information recording medium. The ideal signal generator generates a target waveform serving as an equalization target. The weighted equalization error calculator calculates a data string by performing convolution computation for an equalization error which is a difference between the equalized waveform and the target waveform, on the basis of one of the playback data string and the equalized waveform input from the first FIR filter and the target waveform input from the ideal signal generator. The coefficient calculator calculates a tap coefficient for the first FIR filter on the basis of the data string input from the weighted equalization error calculator, and outputs the tap coefficient to the first FIR filter. An information playback method is also disclosed.

摘要翻译： 信息重放装置包括第一FIR滤波器，理想信号发生器，加权均衡误差计算器和系数计算器。 第一FIR滤波器通过将通过回放记录在信息记录介质上的记录信号而获得的重放数据串相等于部分响应波形来生成均衡波形。 理想信号发生器产生用作均衡目标的目标波形。 加权均衡误差计算器基于从第一FIR滤波器输入的重放数据串和均衡波形之一执行均衡误差的均衡误差的卷积计算来计算数据串，该均衡误差是均衡波形和目标波形之间的差 以及从理想信号发生器输入的目标波形。 系数计算器基于从加权均衡误差计算器输入的数据串计算第一FIR滤波器的抽头系数，并将抽头系数输出到第一FIR滤波器。 还公开了一种信息重放方法。

公开(公告)号：US20050094304A1

公开(公告)日：2005-05-05

申请号：US10974567

申请日：2004-10-27

申请人： Shuichi Ohkubo ,  Masatsugu Ogawa

发明人： Shuichi Ohkubo ,  Masatsugu Ogawa

IPC分类号： G11B20/10 ,  G11B20/14 ,  G11B20/18 ,  H04L25/03 ,  H04L25/497 ,  G11B5/035

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  H04L25/03038

摘要： An information playback apparatus includes a first FIR filter, ideal signal generator, weighted equalization error calculator, and coefficient calculator. The first FIR filter generates an equalized waveform by equalizing, to a partial response waveform, a playback data string obtained by playing back a recorded signal recorded on an information recording medium. The ideal signal generator generates a target waveform serving as an equalization target. The weighted equalization error calculator calculates a data string by performing convolution computation for an equalization error which is a difference between the equalized waveform and the target waveform, on the basis of one of the playback data string and the equalized waveform input from the first FIR filter and the target waveform input from the ideal signal generator. The coefficient calculator calculates a tap coefficient for the first FIR filter on the basis of the data string input from the weighted equalization error calculator, and outputs the tap coefficient to the first FIR filter. An information playback method is also disclosed.

摘要翻译： 信息重放装置包括第一FIR滤波器，理想信号发生器，加权均衡误差计算器和系数计算器。 第一FIR滤波器通过将通过回放记录在信息记录介质上的记录信号而获得的重放数据串相等于部分响应波形来生成均衡波形。 理想信号发生器产生用作均衡目标的目标波形。 加权均衡误差计算器基于从第一FIR滤波器输入的重放数据串和均衡波形中的一个执行均衡误差的均衡误差的卷积计算来计算数据串，该均衡误差是均衡波形和目标波形之间的差 以及从理想信号发生器输入的目标波形。 系数计算器基于从加权均衡误差计算器输入的数据串计算第一FIR滤波器的抽头系数，并将抽头系数输出到第一FIR滤波器。 还公开了一种信息重放方法。