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。

公开(公告)号：US07751288B2

公开(公告)日：2010-07-06

申请号：US11704352

申请日：2007-02-09

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 write power adjustment method and optical read/write apparatus for accurate optimum write power setup. Different levels of write power Pwm are used to perform a test write and calculate a modulation Mm corresponding to each level of write power Pwm. Different write power compensated values Pcn are used to calculate an evaluated value Smn=Mm×(Pwm−Pcn). Pcn that maximizes the linearity of the relationship between compensated write power (Pwm−Pcn) and evaluated value Smn is determined as an optimum write power compensated value PcO. Compensated write power PthO that provides a modulation of zero, that is, an evaluated value SmO of zero, when the relationship between compensated write power (Pwm−PcO) for PcO and evaluated value SmO is subjected to linear approximation is determined. PthO and optimum write power compensated value PcO are used to calculate a write power threshold Pth=PthO+PcO. A predetermined calculation is performed on Pth to determine optimum write power Popt. In contrast to a conventional write power adjustment method (κ method), the present invention makes it possible to accurately adjust for the optimum write power even when the optical disc's write power Pwm-to-evaluated value M×Pw relationship is not linear or its modulation M varies.

摘要翻译： 一种写入功率调整方法和光学读/写装置，用于精确的最佳写入功率设置。 使用不同级别的写入功率Pwm进行测试写入，并计算与写入功率Pwm对应的调制Mm。 使用不同的写功率补偿值Pcn来计算评估值Smn = Mm×（Pwm-Pcn）。 将补偿写入功率（Pwm-Pcn）与评估值Smn之间的关系的线性度最大化的Pcn被确定为最佳写入功率补偿值PcO。 确定当PcO的补偿写入功率（Pwm-PcO）与评估值SmO之间的关系经受线性近似时，提供零调制的补偿写入功率PthO，即评估值SmO为零。 PthO和最佳写功率补偿值PcO用于计算写功率阈值Pth = PthO + PcO。 在Pth上执行预定的计算以确定最佳写入功率Popt。 与传统的写入功率调整方法（＆kgr;方法）相反，即使当光盘的写入功率Pwm至评估值M×Pw关系不是线性时，本发明也可以精确地调整最佳写入功率， 其调制M变化。

公开(公告)号：US20100195459A1

公开(公告)日：2010-08-05

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： G11B19/00

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。

公开(公告)号：US20100195462A1

公开(公告)日：2010-08-05

申请号：US12568977

申请日：2009-09-29

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： G11B27/36

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：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：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：US08107339B2

公开(公告)日：2012-01-31

申请号：US12568977

申请日：2009-09-29

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： G11B27/36 ,  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.

公开(公告)号：US20120002526A1

公开(公告)日：2012-01-05

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： G11B27/36

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：US08050158B2

公开(公告)日：2011-11-01

申请号：US12569059

申请日：2009-09-29

申请人： Soichiro Eto ,  Koichi Watanabe ,  Harukazu Miyamoto

发明人： Soichiro Eto ,  Koichi Watanabe ,  Harukazu Miyamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/1267

摘要： A write power adjustment method makes it possible to set optimum write power with high precision. Trial writing is conducted by using write power Pw,m (where m is an integer) of a plurality of kinds, and a modulation M,m associated with each write power is calculated. Optimum asymptotic power Pasy-opt is calculated by performing predetermined computation by using reference asymptotic power Pasy-ref and reference write start power Pws-ref which are previously determined for each medium. An evaluated value S,m=M,m×(Pw,m−Pasy-opt) is calculated by using the optimum asymptotic power Pasy-opt. Write power Pw that makes the evaluated value S equal to zero when applying straight line approximation to a relation between the write power Pw,m and the evaluated value S,m is calculated as optimum write start power Pws-opt. And optimum write power Pw-opt is found by performing predetermined computation on the optimum write start power Pws-opt.

摘要翻译： 写入功率调整方法能够以高精度设置最佳写入功率。 通过使用多种写入功率Pw，m（其中m是整数）进行试写，并且计算与每个写入功率相关联的调制M，m。 通过使用预先为每种介质确定的参考渐近功率Pasy-ref和参考写入启动功率Pws-ref执行预定的计算来计算最佳渐近功率Pasy-opt。 通过使用最佳渐近幂Pasy-opt计算评价值S，m = M，m×（Pw，m-Pasy-opt）。 写入功率Pw，当将写入功率Pw，m与评估值S之间的关系应用直线近似时，使评估值S等于零，将m计算为最佳写入开始功率Pws-opt。 通过对最佳写入开始功率Pws-opt执行预定的计算，找到最佳写入功率Pw-opt。

公开(公告)号：US08472293B2

公开(公告)日：2013-06-25

申请号：US13515654

申请日：2010-03-02

申请人： Soichiro Eto ,  Koichi Watanabe ,  Harukazu Miyamoto

发明人： Soichiro Eto ,  Koichi Watanabe ,  Harukazu Miyamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/0045 ,  G11B7/1267 ,  G11B7/24038 ,  G11B2007/0013

摘要： In write power adjustment for an optical disc having a plurality of information storage layers, data of trial writing is varied by the influence of layers other than a target layer. It is difficult, therefore, to determine optimal write power. A modulation M[m] is obtained from a reproduction signal amplitude of a signal subjected to the trial writing performed with use of write powers Pw[m] (m being an integer) of a plurality of kinds. At least an optimum write power intercept Pint_opt is determined by fitting a relation between the Pw[m] and the M[m] by a modulation characteristic formula M=Masy×(1−(Pint−Pasy)/(Pw−Pasy)) having an asymptotic modulation Masy, a write power intercept Pint, and an asymptotic write power Pasy as parameters. Approximation accuracy by the fitting and/or quality of the trial writing signal are evaluated with use of at least the M[m], the modulation characteristic formula, and the Pint_opt. An optimum write power Pw_opt is calculated by performing a specified operation at least with use of the Pint_opt.

摘要翻译： 在具有多个信息存储层的光盘的写入功率调整中，试写的数据由目标层以外的层的影响而变化。 因此，很难确定最佳写入功率。 通过使用多种写入功率Pw [m]（m为整数）进行试写的信号的再现信号振幅，获得调制M [m]。 通过用调制特性公式M = Masy×（1-（Pint-Pasy）/（Pw-Pasy））拟合Pw [m]和M [m]之间的关系来确定至少最佳写功率截止Pint_opt 具有渐近调制Masy，写功率截取Pint，渐近写功率Pasy作为参数。 通过使用至少M [m]，调制特性公式和Pint_opt来评估试写信号的拟合和/或质量的近似精度。 至少通过使用Pint_opt执行指定的操作来计算最佳写入功率Pw_opt。