公开(公告)号：US08531932B2

公开(公告)日：2013-09-10

申请号：US12608099

申请日：2009-10-29

申请人： Yusuke Nakamura ,  Koichiro Nishimura ,  Hiroyuki Minemura ,  Takahiro Kurokawa

发明人： Yusuke Nakamura ,  Koichiro Nishimura ,  Hiroyuki Minemura ,  Takahiro Kurokawa

IPC分类号： G11B20/10

CPC分类号： G11B20/10009 ,  G11B7/1267 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10212 ,  G11B20/10296 ,  G11B20/10481 ,  G11B20/1816 ,  G11B20/182 ,  G11B20/22 ,  G11B20/225 ,  G11B2220/2541 ,  H03M13/41

摘要： In a optical disc system with constraint length equal to or greater than 5, under assumption that continuous 2T count included in a predetermined evaluation bit array is denoted by i and that length of evaluation bit array of interest is given by (5+2i), judgment is passed on whether binary bit arrays include the evaluation bit array. Previously prepared are the error vectors calculated on the basis of target signals corresponding to the evaluation bit arrays and the target signals derived from the binary bit arrays, and the selection of a desired error vector is performed depending on the result of the judgment. At the same time, an equalized error vector is calculated from the target signal derived from the binary bit array and the reproduced signal, and the inner product of the equalized error vector and the selected error vector is calculated.

摘要翻译： 在具有等于或大于5的约束长度的光盘系统中，假定包括在预定评估位阵列中的连续2T计数由i表示，并且感兴趣的评估位阵列的长度由（5 + 2i）给出， 传递二进制位数组是否包含评估位数组的判断。 先前准备的是基于对应于评估比特列的目标信号和从二进制位阵列导出的目标信号计算的误差向量，并且根据判断结果执行期望误差向量的选择。 同时，根据从二进制位阵列和再现信号得到的目标信号计算均衡误差向量，并且计算均衡误差向量和所选误差向量的内积。

公开(公告)号：US08483028B2

公开(公告)日：2013-07-09

申请号：US13516011

申请日：2010-03-02

申请人： Takahiro Kurokawa ,  Hiroyuki Minemura

发明人： Takahiro Kurokawa ,  Hiroyuki Minemura

IPC分类号： G11B7/00

CPC分类号： G11B7/00456 ,  G11B7/0062 ,  G11B7/126 ,  G11B20/10009 ,  G11B20/10212 ,  G11B20/10277 ,  G11B20/10407 ,  G11B2220/2541

摘要： Provided is a recording adjustment method capable of controlling an edge position of a mark with high accuracy. Based on the acquired read-out signal waveform, a starting position of a last pulse is adjusted such that a so-called L-SEAT shift value for an end edge of the mark becomes minimum.

摘要翻译： 提供了一种能够高精度地控制标记的边缘位置的记录调整方法。 基于所获取的读出信号波形，调整最后脉冲的开始位置，使得标记的结束边缘的所谓的L-SEAT移位值变为最小。

公开(公告)号：US08456974B2

公开(公告)日：2013-06-04

申请号：US13334215

申请日：2011-12-22

申请人： Soichiro Eto ,  Takahiro Kurokawa

发明人： Soichiro Eto ,  Takahiro Kurokawa

IPC分类号： G11B7/00

CPC分类号： G11B7/1267 ,  G11B7/0906 ,  G11B7/24038 ,  G11B2007/0013

摘要： The present invention achieves tracking servo using a recording signal on a grooveless optical disc. Trial writing signals are written by using multiple recording conditions, and a recommended recording condition having favorable qualities of a reproduction signal and a tracking error signal is determined based on the trial writing signals. Then, recording is performed by using the recommended recording condition. In addition, by using a recording condition determined based on an optimum power control performed prior to the recording, signals are recorded adjacent to each other in at least two tracks. Signals are recorded by using the determined recording condition under which a tracking error signal quality obtained from the recording signal matches a desired value of a tracking error signal quality of the medium.

摘要翻译： 本发明使用无槽光盘上的记录信号实现跟踪伺服。 通过使用多个记录条件来写入试写信号，并且基于试写信号来确定具有良好的再现信号和跟踪误差信号质量的推荐记录条件。 然后，使用推荐的记录条件进行记录。 此外，通过使用基于在记录之前执行的最佳功率控制确定的记录条件，在至少两个轨道中彼此相邻地记录信号。 通过使用确定的记录条件来记录信号，根据该记录条件，从记录信号获得的跟踪误差信号质量与介质的跟踪误差信号质量的期望值相匹配。

公开(公告)号：US08315147B2

公开(公告)日：2012-11-20

申请号：US12420845

申请日：2009-04-09

申请人： Akemi Hirotsune ,  Shigeharu Kimura ,  Takahiro Kurokawa

发明人： Akemi Hirotsune ,  Shigeharu Kimura ,  Takahiro Kurokawa

IPC分类号： G11B7/24

CPC分类号： G11B7/24038

摘要： In a multilayer optical recording medium having at least three recording layers, an influence of interlayer crosstalk due to unnecessary light is suppressed. Each of the recording layers includes an information recording area, and the recording layers other than the nearest recording layer and the farthest recording layer when viewed from a light incident side include a first annular area having uneven patterns formed thereon, and a second annular area having uneven patterns formed thereon, the first annular area being adjacent to an inner side of the information recording area, the second annular area being adjacent to an outer side of the information recording area.

摘要翻译： 在具有至少三个记录层的多层光学记录介质中，抑制了由于不必要的光引起的层间串扰的影响。 每个记录层包括信息记录区，并且当从光入射侧观察时，除了最近记录层和最远记录层之外的记录层包括其上形成有不均匀图案的第一环形区域和具有形成在其上的不均匀图案的第二环形区域， 形成在其上的不均匀图案，第一环形区域与信息记录区域的内侧相邻，第二环形区域与信息记录区域的外侧相邻。

公开(公告)号：US08154973B2

公开(公告)日：2012-04-10

申请号：US13210429

申请日：2011-08-16

申请人： Hiroyuki Minemura ,  Soichiro Eto ,  Takahiro Kurokawa ,  Shuichi Kusaba

发明人： Hiroyuki Minemura ,  Soichiro Eto ,  Takahiro Kurokawa ,  Shuichi Kusaba

IPC分类号： G11B5/09

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10212 ,  G11B20/10296 ,  G11B20/1816 ,  G11B20/182 ,  G11B2220/2541 ,  H03M13/39 ,  H03M13/6343

摘要： A highly efficient and reliable reproduced signal evaluation method and an optical disc drive using that method in which assuming that the number of 2T's appearing successively in a predetermined evaluation bitstream is i, the evaluation bitstream is divided into a main bitstream (5+2i) long and sub bitstreams at the ends of the main bitstream. The check process to determine whether a predetermined evaluation bitstream is included in the binarized bitstreams is replaced with a main bitstream agreement check. This can prevent an increase in the circuit size. At the same time, by separately summing up for each main bitstream the calculated results of Euclidean distance between the reproduced signal and the target signal corresponding to the evaluation bitstream, the size of an evaluation summing circuit can be reduced.

摘要翻译： 使用该方法的高效可靠的再现信号评估方法和光盘驱动器，其中假定在预定评估比特流中连续出现的2T的数量为i，则将评估比特流分成主比特流（5 + 2i）长 以及在主比特流的末端的子比特流。 用于确定在二进制化比特流中是否包括预定评估比特流的检查处理被主比特列协议检查替换。 这可以防止电路尺寸的增加。 同时，通过对每个主比特流单独地求和再现信号与对应于评估比特流的目标信号之间的欧氏距离的计算结果，可以减小评估求和电路的大小。

公开(公告)号：US08130610B2

公开(公告)日：2012-03-06

申请号：US12717981

申请日：2010-03-05

申请人： Takahiro Kurokawa

发明人： Takahiro Kurokawa

IPC分类号： G11B20/10

CPC分类号： G11B7/0062 ,  G11B7/00456

摘要： To compensate for edge shifts varying largely in accordance with preceding mark lengths. Provided are a method and a recorder in which a duration of a cooling pulse in each recording pulse string to form a mark having a length of nT is determined on the basis of an edge shift amount of a front edge of a mark whose preceding mark has a length of nT, where n is an integer and T is a channel bit length.

摘要翻译： 以补偿根据先前标记长度变化很大的边缘位移。 提供了一种方法和记录器，其中基于前面标记具有的标记的前边缘的边缘移位量来确定每个记录脉冲串中形成长度为nT的标记的冷却脉冲的持续时间 nT的长度，其中n是整数，T是信道位长度。

公开(公告)号：USRE43105E1

公开(公告)日：2012-01-17

申请号：US13064303

申请日：2011-03-17

申请人： Takahiro Kurokawa ,  Harukazu Miyamoto

发明人： Takahiro Kurokawa ,  Harukazu Miyamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/0906

摘要： An object of the present invention is to improve a conventional DPD method having a problem that a tracking servo becomes unstable due to a reduction in the accuracy of detecting a phase difference between short mark signals at an edge, in a case where the amplitudes of the short mark signals are very small, or where a readout signal contains large noise. To this end, the present invention provides a method for increasing the contribution ratio of long mark signals to generate a tracking error signal by causing a phase difference pulse to include information on a phase difference, and by causing the area of the pulse to be weighted according to the length of a mark/space adjacent to a concerned edge.

摘要翻译： 本发明的一个目的是改进传统的DPD方法，其中由于在检测边缘上的短标记信号之间的相位差的精度降低时跟踪伺服变得不稳定的问题， 短标记信号非常小，或者读出信号包含大的噪声。 为此，本发明提供了一种通过使相位差脉冲包括关于相位差的信息并且通过使得脉冲的面积被加权来增加长标记信号的贡献率以产生跟踪误差信号的方法 根据与相关边缘相邻的标记/空间的长度。

公开(公告)号：US08089841B2

公开(公告)日：2012-01-03

申请号：US12153222

申请日：2008-05-15

申请人： Akemi Hirotsune ,  Junko Ushiyama ,  Hiroyuki Minemura ,  Takahiro Kurokawa ,  Harukazu Miyamoto

发明人： Akemi Hirotsune ,  Junko Ushiyama ,  Hiroyuki Minemura ,  Takahiro Kurokawa ,  Harukazu Miyamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/005 ,  G11B7/24038 ,  G11B20/1217 ,  G11B20/22 ,  G11B2007/0013 ,  G11B2020/1298 ,  G11B2220/235 ,  G11B2220/2537

摘要： Regarding a signal recorded with a first frequency in a recording area on a specific first recording layer and a signal recorded with a second frequency different from the first frequency in a recording area on a second recording layer which might cause interlayer crosstalk in relation to the first recording layer, a reproducing signal measurement method for a multilayer optical recording medium having at least three recording layers includes reproducing the signal recorded in the recording area on the first recording layer, separating signals recorded respectively with the first and second frequencies, discriminating signal amplitude of the first frequency and a maximum value in signal amplitude of the second frequency, and calculating a signal amplitude ratio between them to measure interlayer crosstalk contained in the signal reproduced from the recording area on the first recording layer. Thus, the interlayer crosstalk quantity caused by unnecessary light can be measured quantitatively.

摘要翻译： 关于在特定第一记录层上的记录区域中以第一频率记录的信号和在第二记录层上的记录区域中以与第一频率不同的第二频率记录的信号，其可能引起与第一频率相关的层间串扰 记录层，用于具有至少三个记录层的多层光学记录介质的再现信号测量方法包括：再现记录在第一记录层上的记录区域中的信号，分离分别记录第一和第二频率的信号，区分信号幅度 第一频率和第二频率的信号幅度的最大值，并且计算它们之间的信号幅度比以测量从第一记录层上的记录区域再现的信号中包含的层间串扰。 因此，可以定量地测量由不必要的光引起的层间串扰量。

公开(公告)号：US08085640B2

公开(公告)日：2011-12-27

申请号：US12569021

申请日：2009-09-29

申请人： Hiroyuki Minemura ,  Takahiro Kurokawa

发明人： Hiroyuki Minemura ,  Takahiro Kurokawa

IPC分类号： G11B5/09

CPC分类号： G11B20/10009 ,  G11B7/0045 ,  G11B7/005 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10212 ,  G11B20/10296 ,  G11B20/10481 ,  G11B20/1816 ,  G11B20/182 ,  G11B20/22 ,  G11B20/225 ,  G11B2220/2541

摘要： A method for evaluating reproduced signal wherein when Euclidean distance is calculated by judging the coincidence between a binary bit array and a predetermined evaluation bit array in the evaluation of the quality of reproduced signal, the assumption is made that a continuous 2T count included in a predetermined evaluation bit array is denoted by i and that each evaluation bit array is composed of a main bit array having a bit length of (5+2i); and judgment on whether binary bit arrays include the predetermined evaluation bit array, is concentrated on the coincidence judgment of the main bit arrays.

摘要翻译： 一种用于评估再现信号的方法，其中通过在评估再现信号的质量中判断二进制位阵列和预定评估位阵列之间的一致性来计算欧几里得距离时，假设包括在预定的 评估位阵列由i表示，并且每个评估位阵列由具有位长度（5 + 2i）的主位阵列组成; 并且关于二进制位阵列是否包括预定的评估位阵列的判断集中在主位阵列的重合判断上。

公开(公告)号：US07978576B2

公开(公告)日：2011-07-12

申请号：US12760935

申请日：2010-04-15

申请人： Soichiro Eto ,  Koichi Watanabe ,  Takahiro Kurokawa

发明人： Soichiro Eto ,  Koichi Watanabe ,  Takahiro Kurokawa

IPC分类号： G11B15/52

CPC分类号： G11B7/0062 ,  G11B7/1267

摘要： A power adjustment method in which a modulation index is calculated from reproduced signals of patterns recorded by irradiating light onto an optical information recording medium with a recording power varied and an optimum power of irradiation light is set up using the modulation index. The power adjustment method includes calculating an optimum value PcO of a predetermined correction term Pc using a relation of a value obtained by subtracting the predetermined correction term Pc from the recording power and the modulation index, finding a value Pth of the recording power at which the modulation index becomes substantially zero in the relation of the value obtained by subtracting the optimum value PcO from the recording power and the modulation index, and setting up a value obtained by multiplying the value of Pth by a predetermined constant as a recording power of each of the recording patterns.

摘要翻译： 一种功率调整方法，其中根据通过将光照射到记录功率变化的光信息记录介质上记录的图案的再现信号来计算调制指数，并且使用调制指数建立照射光的最佳功率。 功率调整方法包括使用通过从记录功率减去预定校正项Pc和调制指数获得的值的关系来计算预定校正项Pc的最佳值PcO，找到记录功率的记录功率的值Pth， 调制指数在通过从记录功率减去最佳值PcO而获得的值与调制指数之间的关系基本上为零，并且将通过将Pth的值乘以预定常数获得的值作为每个的记录功率 录音模式。