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：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：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：US20090059747A1

公开(公告)日：2009-03-05

申请号：US11817464

申请日：2006-03-14

申请人： Masaki Nakano ,  Masatsugu Ogawa ,  Shigeru Shimonou

发明人： Masaki Nakano ,  Masatsugu Ogawa ,  Shigeru Shimonou

IPC分类号： G11B20/00

CPC分类号： G11B7/1267 ,  G11B7/00718 ,  G11B7/0956

摘要： [PROBLEMS] To reduce the number of recording condition adjustment steps before information recording, simplify the recording condition adjustment procedure, and perform stable and accurate recoding condition adjustment of an information recording medium.[MEANS FOR SOLVING PROBLEMS] When recording information on a recording medium, the recording condition is optimized. Next, under the optimized recording condition, a signal is recorded in a prescribed area of the information recording medium. Next, by using the signal recorded under the optimized recording condition, a part of the recording condition for the next and later is adjusted. Thus, a part of the recording condition is adjusted by using the signal recorded under the optimized recording condition and accordingly, it is possible to rapidly perform the recording condition adjustment before information recording.

摘要翻译： [问题]为了减少信息记录前的记录条件调整步骤的数量，简化记录条件调整程序，并且执行信息记录介质的稳定和准确的记录条件调整。 解决问题的方法当在记录介质上记录信息时，优化记录条件。 接下来，在优化的记录条件下，信号被记录在信息记录介质的规定区域中。 接下来，通过使用在优化记录条件下记录的信号，调整下一个和稍后的记录条件的一部分。 因此，通过使用在优化的记录条件下记录的信号来调整记录条件的一部分，因此，可以在信息记录之前快速执行记录条件调整。

公开(公告)号：US20110271051A1

公开(公告)日：2011-11-03

申请号：US13143443

申请日：2010-01-20

申请人： Masaki Nakano ,  Masatsugu Ogawa

发明人： Masaki Nakano ,  Masatsugu Ogawa

IPC分类号： G06F12/08

CPC分类号： G06F3/0632 ,  G06F3/0611 ,  G06F3/0677 ,  G06F3/0686 ,  G11B27/002 ,  G11B2220/2537 ,  G11B2220/41

摘要： For the purpose of reducing the time for information processing in an array type disk device provided with a plurality of optical disk devices, when a beginning address is notified from any one of the optical disk devices to a main control device of the array type disk device, the main control device determines the beginning address notified first as a writing start address, without waiting for a notification of a beginning address from any other optical disk devices. Then, the main control device notifies the determined writing start address to the respective optical disk devices. Accordingly, even if search times for the writing start address are different among the optical disk devices, all the optical disk devices can start the writing of information based on which optical disk device has most quickly notified the beginning address.

摘要翻译： 为了减少设置有多个光盘装置的阵列式磁盘装置中的信息处理的时间，当从任何一个光盘装置通知起始地址到阵列式磁盘装置的主控装置时 ，主控制装置将首先通知的开始地址确定为写入开始地址，而不用等待来自任何其他光盘装置的起始地址的通知。 然后，主控制装置将确定的写入开始地址通知各光盘装置。 因此，即使在光盘装置中写入开始地址的搜索时间不同，所有的光盘装置都可以开始基于哪个光盘装置最快地通知起始地址的信息的写入。

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：US20100315914A1

公开(公告)日：2010-12-16

申请号：US12526120

申请日：2008-01-28

申请人： Masaki Nakano ,  Masatsugu Ogawa

发明人： Masaki Nakano ,  Masatsugu Ogawa

IPC分类号： G11B19/00

CPC分类号： G11B7/1267 ,  G11B7/0062

摘要： A light irradiation power adjusting method includes a first recording step, a first reproducing step, a first measuring step, a bias power determining step and a recording power determining step. In the first recording step, an adjustment pattern is recorded to an optical information recording medium while fixing a recording power to a predetermined first power value and while changing a bias power among a plurality of second power values within a predetermined range. In the first reproducing step, the recorded adjustment pattern is reproduced so as to generate a reproduction signal. In the first measuring step, asymmetry values corresponding to the plurality of second power values are measured. In the bias power determining step, an optimum bias power value is determined based on the asymmetry values. In the recording power determining step, an optimum recording power value is determined based on the optimum bias power value.

摘要翻译： 光照射功率调整方法包括第一记录步骤，第一再现步骤，第一测量步骤，偏置功率确定步骤和记录功率确定步骤。 在第一记录步骤中，在将记录功率固定到预定的第一功率值的同时，同时在预定范围内的多个第二功率值之间改变偏置功率，将调整模式记录到光学信息记录介质。 在第一再现步骤中，再现所记录的调整图案，以产生再现信号。 在第一测量步骤中，测量对应于多个第二功率值的不对称值。 在偏置功率确定步骤中，基于不对称值来确定最佳偏置功率值。 在记录功率确定步骤中，基于最佳偏置功率值来确定最佳记录功率值。

公开(公告)号：US20100039912A1

公开(公告)日：2010-02-18

申请号：US12439894

申请日：2007-09-11

申请人： Masaki Nakano ,  Masatsugu Ogawa ,  Masaru Nakamura

发明人： Masaki Nakano ,  Masatsugu Ogawa ,  Masaru Nakamura

IPC分类号： G11B27/36

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10296 ,  G11B2220/2537

摘要： An equalizer (22) performs a PR equalization of a reproduced signal waveform output from an A/D converter (21). A reference-waveform generation unit (42) generates a reference reproduced-waveform based on a recording data train estimated from the reproduced signal waveform by a recognition unit (30). An equalization-error calculation unit (43) calculates an equalization error between the reference reproduced-waveform and the reproduced signal waveform. A transient equalization-error detector (44) extracts equalization error information, as a transient equalization error, at the time instant at which the reference reproduced-waveform assumes a specific level, and at which the specific level-value and a level-value of the reference reproduced-waveform at one channel clock before or after the time instant satisfy therebetween a specific relative relationship. The extracted transient equalization error is used as an index showing the quality of the recorded mark.

摘要翻译： 均衡器（22）执行从A / D转换器（21）输出的再现信号波形的PR均衡。 参考波形生成单元（42）基于由再现信号波形由识别单元（30）估计的记录数据序列，生成基准再现波形。 均衡误差计算单元（43）计算参考再现波形和再现信号波形之间的均衡误差。 瞬时均衡误差检测器（44）在参考再现波形呈现特定电平的时刻提取作为瞬态均衡误差的均衡误差信息，并且在该均衡误差信息中，特定电平值和电平值 在时间之前或之后的一个通道时钟的参考再生波形满足其特定的相对关系。 提取的瞬态均衡误差用作显示记录标记质量的指标。