公开(公告)号：US07058878B2

公开(公告)日：2006-06-06

申请号：US10368416

申请日：2003-02-20

申请人： Toshikazu Kanaoka ,  Masakazu Taguchi ,  Akihiro Itakura

发明人： Toshikazu Kanaoka ,  Masakazu Taguchi ,  Akihiro Itakura

IPC分类号： H03M13/03

CPC分类号： H03M13/2957 ,  H03M13/6331

摘要： A data signal processing apparatus is capable of reproducing original data with a small number of repetition times of an iterative decoding process, which is realized by likelihood information operating means that generate updated likelihood information, carry out a predetermined operation on a plurality of pieces of likelihood information corresponding to the original data obtained by the iterative decoding process, and reproduce the original data.

公开(公告)号：US20090141384A1

公开(公告)日：2009-06-04

申请号：US12005196

申请日：2007-12-26

申请人： Akihiro Itakura ,  Toshikazu Kanaoka

发明人： Akihiro Itakura ,  Toshikazu Kanaoka

IPC分类号： G11B27/36

CPC分类号： G11B20/10009 ,  G11B5/09 ,  G11B5/4555 ,  G11B20/10203 ,  G11B2005/0029 ,  G11B2220/2516

摘要： A device inspects the performance of a perpendicular magnetic recording medium by separating the medium noise component of a perpendicular magnetic recording medium to decrease the error rate by accurately separating and detecting the medium noise component. Using correlation matrices, jitter noise and T50 noise which depend on the transition point of magnetization, and DC noise which is added to a DC component are separated and detected from the medium noise component of a perpendicular magnetic recording medium acquired from the reproducing waveform of a magnetic head. By adding a base matrix of the DC noise component to a linear separation expression for detecting the noise power from the medium noise component, the DC noise is detected using the least square method, separately from the other medium noise, which depends on the fluctuation of magnetization transition points.

摘要翻译： 设备通过分离垂直磁记录介质的介质噪声分量来检查垂直磁记录介质的性能，通过精确地分离和检测介质噪声分量来降低误码率。 使用相关矩阵，依赖于磁化转变点的抖动噪声和T50噪声以及加到直流分量上的直流噪声从从一个直流分量的再现波形获得的垂直磁记录介质的中等噪声分量中被分离和检测 磁头。 通过将DC噪声分量的基本矩阵添加到用于检测来自中等噪声分量的噪声功率的线性分离表达式，使用最小二乘法检测DC噪声，与其他中等噪声分开，这取决于波动 磁化转变点。

公开(公告)号：US20070205922A1

公开(公告)日：2007-09-06

申请号：US11484933

申请日：2006-07-12

申请人： Akihiro Itakura ,  Toshikazu Kanaoka ,  Toshio Ito

发明人： Akihiro Itakura ,  Toshikazu Kanaoka ,  Toshio Ito

IPC分类号： H03M7/00

CPC分类号： H03M5/145

摘要： An MTR encoder includes convolution units that perform convolution of input data using additional bits, MTR encoding units that MTR-encode data obtained by the convolution units, RDS calculating units and on-bit sequence checking units that calculate RDSs and counts the number of sequential on-bits of the data MTR-encoded by the MTR encoding units, respectively, and a selecting unit that selects optimum data based on the RDSs and the number of sequential on-bits.

摘要翻译： MTR编码器包括使用附加位执行输入数据的卷积的卷积单元，对由卷积单元获得的数据进行MTR编码的MTR编码单元，RDS计算单元和计算RDS的计数单元，并对序列数进行计数 分别由MTR编码单元MTR编码的数据的一行和选择单元，其基于RDS和顺序导通位数选择最佳数据。

公开(公告)号：US08000050B2

公开(公告)日：2011-08-16

申请号：US12413516

申请日：2009-03-28

申请人： Toshikazu Kanaoka ,  Akihiro Itakura

发明人： Toshikazu Kanaoka ,  Akihiro Itakura

IPC分类号： G11B5/09

CPC分类号： G11B5/59627 ,  G11B5/5965 ,  G11B20/10222 ,  G11B20/1217 ,  G11B20/1403 ,  G11B2020/1242 ,  G11B2020/1245 ,  G11B2020/1281 ,  G11B2020/1484 ,  G11B2220/2516

摘要： A magnetic storage control apparatus for controlling a magnetic storage apparatus that uses a recording medium having a plurality of reference signals on its track and having a data area between the reference signals. The apparatus includes: a measurement section that reproduces the reference signal in a predetermined track of the recording medium and measures, for each data area, the time for a head to scan the data area to obtain a measurement value; a calculation section that calculates a setting value concerning the frequency of a recording clock used in data recording based on the measurement values of a plurality of data areas obtained by the measurement section; and a generation section that generates the recording clock based on the measurement values obtained by the measurement section and setting value calculated by the calculation section.

摘要翻译： 一种磁存储控制装置，用于控制在其轨道上使用具有多个参考信号的记录介质并且具有参考信号之间的数据区的磁存储装置。 该装置包括：测量部分，其再现记录介质的预定轨道中的参考信号，并且针对每个数据区域测量头扫描数据区域以获得测量值的时间; 计算部，其基于由所述测量部获得的多个数据区域的测量值，计算与在数据记录中使用的记录时钟的频率有关的设定值; 以及生成部，其基于由测量部获得的测量值和由计算部计算出的设定值来生成记录时钟。

公开(公告)号：US20090244756A1

公开(公告)日：2009-10-01

申请号：US12409636

申请日：2009-03-24

申请人： Akihiro Itakura ,  Toshikazu Kanaoka

发明人： Akihiro Itakura ,  Toshikazu Kanaoka

IPC分类号： G11B27/36 ,  G11B15/18

CPC分类号： G11B5/59688 ,  G11B5/5526

摘要： A data storage apparatus includes: a medium for storing data having synchronization marks and data blocks, the synchronization mark and the data block being allocated alternately in the circumference direction of the medium; a head writing data into or reading out data from the medium; and a processor for executing a process including: reading out synchronization marks, measuring time for the head to pass through each of the data blocks based on signals read out from each of the synchronization marks in the circumference direction, generating write/read clock for each of the data blocks, which is continuously changing in speed, by calculating difference in time for the head to pass through the each one of the data blocks and its adjacent one of the blocks on the basis of the time measured, and writing data into or reading out data from the medium in synchronization with the write/read clock.

摘要翻译： 数据存储装置包括：用于存储具有同步标记和数据块的数据的介质，所述同步标记和所述数据块在所述介质的圆周方向上交替地分配; 将数据写入或从介质读出数据的头; 以及用于执行处理的处理器，包括：读出同步标记，根据从圆周方向上的每个同步标记读出的信号测量头部经过每个数据块的时间，为每个数据块生成写入/读取时钟 通过根据测量的时间计算头部经过数据块和其相邻块之一的每一个数据块的时间差，并将数据写入或 与写/读时钟同步从介质读出数据。

公开(公告)号：US08102615B2

公开(公告)日：2012-01-24

申请号：US12409636

申请日：2009-03-24

申请人： Akihiro Itakura ,  Toshikazu Kanaoka

发明人： Akihiro Itakura ,  Toshikazu Kanaoka

IPC分类号： G11B5/09

CPC分类号： G11B5/59688 ,  G11B5/5526

摘要： A data storage apparatus includes: a medium for storing data having synchronization marks and data blocks, the synchronization mark and the data block being allocated alternately in the circumference direction of the medium; a head writing data into or reading out data from the medium; and a processor for executing a process including: reading out synchronization marks, measuring time for the head to pass through each of the data blocks based on signals read out from each of the synchronization marks in the circumference direction, generating write/read clock for each of the data blocks, which is continuously changing in speed, by calculating difference in time for the head to pass through the each one of the data blocks and its adjacent one of the blocks on the basis of the time measured, and writing data into or reading out data from the medium in synchronization with the write/read clock.

摘要翻译： 数据存储装置包括：用于存储具有同步标记和数据块的数据的介质，所述同步标记和所述数据块在所述介质的圆周方向上交替地分配; 将数据写入或从介质读出数据的头; 以及用于执行处理的处理器，包括：读出同步标记，根据从圆周方向上的每个同步标记读出的信号测量头部经过每个数据块的时间，为每个数据块生成写入/读取时钟 通过根据测量的时间计算头部经过数据块和其相邻块之一的每一个数据块的时间差，并将数据写入或 与写/读时钟同步从介质读出数据。

公开(公告)号：US07388523B2

公开(公告)日：2008-06-17

申请号：US11484933

申请日：2006-07-12

申请人： Akihiro Itakura ,  Toshikazu Kanaoka ,  Toshio Ito

发明人： Akihiro Itakura ,  Toshikazu Kanaoka ,  Toshio Ito

IPC分类号： H03M5/00

CPC分类号： H03M5/145

摘要： An MTR encoder includes convolution units that perform convolution of input data using additional bits, MTR encoding units that MTR-encode data obtained by the convolution units, RDS calculating units and on-bit sequence checking units that calculate RDSs and counts the number of sequential on-bits of the data MTR-encoded by the MTR encoding units, respectively, and a selecting unit that selects optimum data based on the RDSs and the number of sequential on-bits.

摘要翻译： MTR编码器包括使用附加位执行输入数据的卷积的卷积单元，对由卷积单元获得的数据进行MTR编码的MTR编码单元，RDS计算单元和计算RDS的计数单元，并对序列数进行计数 分别由MTR编码单元MTR编码的数据的一行和选择单元，其基于RDS和顺序导通位数选择最佳数据。

公开(公告)号：US06724702B2

公开(公告)日：2004-04-20

申请号：US09997325

申请日：2001-11-29

申请人： Masakazu Taguchi ,  Akiyoshi Uchida ,  Toshikazu Kanaoka

发明人： Masakazu Taguchi ,  Akiyoshi Uchida ,  Toshikazu Kanaoka

IPC分类号： G11B700

CPC分类号： G11B20/10083 ,  G11B7/005 ,  G11B11/10515 ,  G11B11/10597 ,  G11B20/10009 ,  G11B20/10055 ,  G11B20/22

摘要： In an apparatus for reproducing recorded data, a crosstalk signal is generated by converting adjacent data recorded on an adjacent track into a waveform of said reproduction signal and the crostalk signal is deducted from the reproduction signal. Then, the reproduction signal in which the crosstalk signal is eliminated is decoded in accordance with the predetermined algorithm and reproduced.

摘要翻译： 在用于再现记录数据的装置中，通过将记录在相邻轨道上的相邻数据转换成所述再现信号的波形来产生串扰信号，并且从再现信号中减去串扰信号。 然后，根据预定算法解码消除了串扰信号的再现信号并再现。

公开(公告)号：US20060215527A1

公开(公告)日：2006-09-28

申请号：US11190589

申请日：2005-07-27

申请人： Akiyoshi Uchida ,  Toshikazu Kanaoka ,  Masakazu Taguchi

发明人： Akiyoshi Uchida ,  Toshikazu Kanaoka ,  Masakazu Taguchi

IPC分类号： G11B7/00

CPC分类号： G11B7/00736 ,  G11B7/0065 ,  G11B7/00781 ,  G11B7/24044

摘要： A holographic recording medium is a medium which records and reproduces data by irradiation with an information beam and a reference beam. This medium includes a user region for recording user data; and a calibration region for storing calibration data for calibrating an element which determines a recording and reproducing characteristic of a recording and reproducing apparatus for recording and reproducing data on/from the recording medium. The calibration data stored in the calibration region includes pattern information for measuring the element determining the recording and reproducing characteristic of the recording and reproducing apparatus.

摘要翻译： 全息记录介质是通过用信息光束和参考光束照射来记录和再现数据的介质。 该介质包括用于记录用户数据的用户区域; 以及校准区域，用于存储用于校准元件的校准数据，该元件确定用于在/从记录介质上记录和再现数据的记录和再现设备的记录和再现特性。 存储在校准区域中的校准数据包括用于测量确定记录和再现设备的记录和再现特性的元件的模式信息。

公开(公告)号：US20060203689A1

公开(公告)日：2006-09-14

申请号：US11188578

申请日：2005-07-25

申请人： Toshikazu Kanaoka ,  Masakazu Taguchi ,  Akiyoshi Uchida

发明人： Toshikazu Kanaoka ,  Masakazu Taguchi ,  Akiyoshi Uchida

IPC分类号： G11B7/00

CPC分类号： G11B7/0065 ,  G11B7/00781

摘要： A reproducing apparatus for an optical recording medium, comprising: a reference beam irradiator for irradiating an optical recording medium on which information is recorded by holography with a reference beam to generate a reproduction beam; a two-dimensional image pickup device capable of being partially read, which receives the reproduction beam; a partial reading controller for controlling partial reading of information on the two-dimensional image pickup device; and an information processor for performing a predetermined process by using the information to be partially read.

摘要翻译： 一种用于光学记录介质的再现装置，包括：参考光束照射器，用于照射具有参考光束的全息记录信息的光学记录介质以产生再现光束; 能够被部分读取的二维图像拾取装置，其接收再现光束; 用于控制二维图像拾取装置上的信息的部分读取的部分读取控制器; 以及信息处理器，用于通过使用要部分读取的信息来执行预定处理。