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1. 发明授权

US08724441B2 Encoding device, encoding method, recording device, recording method, optical recording medium, decoding device and decoding method 失效
标题翻译：编码装置，编码方法，记录装置，记录方法，光记录介质，解码装置和解码方法
公开(公告)号：US08724441B2
公开(公告)日：2014-05-13
申请号：US13097478
申请日：2011-04-29
申请人： Satoru Higashino
发明人： Satoru Higashino
IPC分类号： G11B20/14
CPC分类号： H03M7/14 , G11B7/00453 , G11B7/00781 , G11B7/24038 , G11B7/24044 , G11B20/10111 , G11B20/1012 , G11B20/10277 , G11B20/10296 , G11B20/1426 , G11B2007/0009 , G11B2007/0013 , G11B2020/1268 , G11B2020/1457 , G11B2220/2504
摘要： An encoding device for converting m-bit data words into n-bit (both n and m are integers and 2n≧2m×2) code words includes a first encoding table in which 2m code words selected from the 2n n-bit code words correspond to 2m m-bit data words, a second encoding table in which 2m code words, which do not overlap with the code words in the first encoding table, of the 2n n-bit code words correspond to 2m m-bit data words, and an encoding unit which selects and outputs a code word, in which an absolute value of a code string DSV is smaller, from code words corresponding to the input m-bit data words in the first encoding table and code words corresponding to the input m-bit data words in the second encoding table.
摘要翻译：用于将m位数据字转换为n位（n和m都是整数，2n≥2m×2）的编码装置包括第一编码表，其中从2n个n位代码字中选择的2m个代码字对应于到2m m位数据字，其中2n个n位码字中不与第一编码表中的码字重叠的2m码字的2m码字对应于2m m位数据字的第二编码表，以及从与第一编码表中的输入m位数据字对应的代码字和与输入的m-位对应的代码字中选择并输出代码串DSV的绝对值较小的代码字的编码单元，第二编码表中的位数据字。

2. 再颁专利

USRE44808E1 Optical disc drive, optical storage medium, optical storage medium inspection apparatus, and optical storage medium inspection method 有权
标题翻译：光盘驱动器，光存储介质，光存储介质检查装置和光存储介质检查方法
公开(公告)号：USRE44808E1
公开(公告)日：2014-03-18
申请号：US13736290
申请日：2013-01-08
申请人： Panasonic Corporation
发明人： Shin-ichi Kadowaki , Mamoru Shoji , Atsushi Nakamura , Takashi Ishida
IPC分类号： G11B7/00
CPC分类号： G01R31/31709 , G01N21/9506 , G01R31/312 , G11B7/00375 , G11B7/00456 , G11B7/00458 , G11B20/10009 , G11B20/10027 , G11B20/10055 , G11B20/10111 , G11B20/10296 , G11B20/10481 , G11B20/1217 , G11B20/1426 , G11B20/225 , G11B2020/1239 , G11B2020/1274 , G11B2020/1298 , G11B2220/2537
摘要： An optical disc drive having an optical pickup head emitting a light beam to an optical storage medium, detecting the light beam reflected from the optical storage medium, and outputting a signal based on the received reflected light, having a jitter measuring unit measuring jitter in signals output from the optical pickup head and having an evaluation unit determining from the measured jitter if the optical storage medium is good or defective. The jitter measuring unit measures jitter in a train of 3T or longer marks or spaces from an optical storage medium to which digital information is recorded as a train of marks or spaces of length kT based on a period T and an integer k of two or more.
摘要翻译：一种光盘驱动器，具有将光束发射到光存储介质的光拾取头，检测从光存储介质反射的光束，并输出基于接收到的反射光的信号，具有测量信号中的抖动的抖动测量单元从光拾取头输出，并且具有评估单元，如果光学存储介质良好或有缺陷，则从所测量的抖动确定。抖动测量单元测量基于周期T和两个或更多个整数k的记录数字信息作为长度kT的标记或空格的列的光存储介质的3T或更长的标记或间隔的列的抖动。

3. 发明授权

US08189445B2 Optical disk reproducing apparatus 有权
公开(公告)号：US08189445B2
公开(公告)日：2012-05-29
申请号：US13150758
申请日：2011-06-01
申请人： Yusuke Nakamura , Masakazu Ikeda
发明人： Yusuke Nakamura , Masakazu Ikeda
IPC分类号： G11B20/10
CPC分类号： G11B7/005 , G11B20/10009 , G11B20/10037 , G11B20/10046 , G11B20/10055 , G11B20/10111 , G11B20/1012 , G11B20/10212 , G11B20/1496 , G11B2220/213 , G11B2220/2579
摘要： The present invention relates to an optical disk reproducing apparatus, and provides a technology capable of supporting even a situation in which a reproduction signal characteristic is changed due to a factor other than recording density of an optical disk by using PRML of different constrained length and capable of improving reading accuracy. The optical disk reproducing apparatus includes a PRML circuit of first constrained length (for example, 4) and a PRML circuit of second constrained length (for example, 5). Equalization error values obtained during calculation of equalization learning in respective circuits are compared with each other in a determination circuit. Switching control of a switch is performed so that an output of one of the PRML circuits having a smaller equalization error value is selected.

4. 发明授权

US08098557B2 Signal evaluation method and signal evaluation apparatus 有权
标题翻译：信号评估方法及信号评估装置
公开(公告)号：US08098557B2
公开(公告)日：2012-01-17
申请号：US13034762
申请日：2011-02-25
申请人： Harumitsu Miyashita , Kohei Nakata , Yasumori Hino , Naohiro Kimura
发明人： Harumitsu Miyashita , Kohei Nakata , Yasumori Hino , Naohiro Kimura
IPC分类号： G11B7/00
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10111 , G11B20/1012 , G11B20/10212 , G11B20/10277 , G11B20/10296 , G11B20/10361 , G11B20/1037 , G11B20/10398 , G11B20/10472 , G11B20/10481 , G11B20/1816 , G11B20/182 , G11B20/225 , G11B2220/2541
摘要： A signal evaluation method according to the present invention is a method for evaluating a read signal, retrieved from an information recording medium, based on a binarized signal generated from the read signal by a PRML method. The method includes the steps of: detecting the patterns of multiple paths associated with the binarized signal and merging into the same state; getting the ideal value of a correct pattern associated with the binarized signal and that of an erroneous pattern that is similar to, but different from, the correct pattern; calculating the difference between a distance from the ideal value of the correct pattern to the read signal and a distance from that of the erroneous pattern to the read signal; calculating, based on the difference, an expected error rate for each predetermined group of patterns by the PRML method; and calculating a standard deviation that is associated with a total error rate, which is obtained by adding together the error rates of the predetermined groups of patterns, and that is used for evaluating the read signal.
摘要翻译：根据本发明的信号评估方法是一种用于根据通过PRML方法从读取信号产生的二值化信号来评估从信息记录介质检索的读取信号的方法。该方法包括以下步骤：检测与二值化信号相关联的多个路径的模式并合并成相同的状态; 获得与二值化信号相关联的正确模式的理想值以及类似于但不同于正确模式的错误模式的理想值; 计算从正确图案的理想值到读取信号的距离与从错误图案到读取信号的距离之间的差; 基于差异，通过PRML方法计算每个预定组模式的预期误码率; 以及计算与总误差率相关联的标准偏差，其通过将预定组图案的误差率相加并且用于评估读取信号而获得。

5. 发明授权

US08077817B2 Arrangement for adaptive bit recovery 有权
标题翻译：自适应位恢复的安排
公开(公告)号：US08077817B2
公开(公告)日：2011-12-13
申请号：US10590555
申请日：2005-02-26
申请人： Axel Kochale , Dirk Schmitt , Stefan Rapp
发明人： Axel Kochale , Dirk Schmitt , Stefan Rapp
IPC分类号： H04B1/10
CPC分类号： G11B20/10296 , G11B20/10009 , G11B20/10046 , G11B20/10111 , G11B20/10287 , G11B20/10481 , G11B2020/1288 , G11B2220/2541
摘要： The present invention relates to an arrangement for adaptive bit recovery, and to an apparatus for reading from and/or writing to recording media using such arrangement. According to the invention, an arrangement for adaptive bit recovery including an adaptive equalizer and an adaptive partial response maximum likelihood detector further includes an overflow control block for the adaptive equalizer for monitoring one or more of the adaptation coefficients and/or a state violation checker for monitoring the allowed states and indicating state violations as well as and a noise detector for detecting larger deviations of the target values.
摘要翻译：本发明涉及一种用于自适应位恢复的装置，以及一种使用这种布置从记录介质读取和/或写入装置。根据本发明，包括自适应均衡器和自适应部分响应最大似然检测器的自适应位恢复装置还包括用于自适应均衡器的用于监视一个或多个自适应系数的溢出控制块和/或状态违规检查器，用于监视允许状态和指示状态违规以及用于检测目标值的较大偏差的噪声检测器。

6. 发明授权

US08068399B2 Signal evaluation method and signal evaluation apparatus 有权
标题翻译：信号评估方法及信号评估装置
公开(公告)号：US08068399B2
公开(公告)日：2011-11-29
申请号：US12394281
申请日：2009-02-27
申请人： Harumitsu Miyashita , Kohei Nakata , Yasumori Hino , Naohiro Kimura
发明人： Harumitsu Miyashita , Kohei Nakata , Yasumori Hino , Naohiro Kimura
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10111 , G11B20/1012 , G11B20/10212 , G11B20/10277 , G11B20/10296 , G11B20/10361 , G11B20/1037 , G11B20/10398 , G11B20/10472 , G11B20/10481 , G11B20/1816 , G11B20/182 , G11B20/225 , G11B2220/2541
摘要： A signal evaluation method according to the present invention is a method for evaluating a read signal, retrieved from an information recording medium, based on a binarized signal generated from the read signal by a PRML method. The method includes the steps of: detecting the patterns of multiple paths associated with the binarized signal and merging into the same state; getting the ideal value of a correct pattern associated with the binarized signal and that of an erroneous pattern that is similar to, but different from, the correct pattern; calculating the difference between a distance from the ideal value of the correct pattern to the read signal and a distance from that of the erroneous pattern to the read signal; calculating, based on the difference, an expected error rate for each predetermined group of patterns by the PRML method; and calculating a standard deviation that is associated with a total error rate, which is obtained by adding together the error rates of the predetermined groups of patterns, and that is used for evaluating the read signal.
摘要翻译：根据本发明的信号评估方法是一种用于根据通过PRML方法从读取信号产生的二值化信号来评估从信息记录介质检索的读取信号的方法。该方法包括以下步骤：检测与二值化信号相关联的多个路径的模式并合并成相同的状态; 获得与二值化信号相关联的正确模式的理想值以及类似于但不同于正确模式的错误模式的理想值; 计算从正确图案的理想值到读取信号的距离与从错误图案到读取信号的距离之间的差; 基于差异，通过PRML方法计算每个预定组模式的预期误码率; 以及计算与总误差率相关联的标准偏差，其通过将预定组图案的误差率相加并且用于评估读取信号而获得。

7. 发明授权

US08059017B2 Code sequence generation method, modulation apparatus, modulation method, modulation program, demodulation apparatus, demodulation method, demodulation program and storage medium 失效
标题翻译：码序生成方法，调制装置，调制方式，调制程序，解调装置，解调方式，解调程序和存储介质
公开(公告)号：US08059017B2
公开(公告)日：2011-11-15
申请号：US11605583
申请日：2006-11-29
申请人： Satoru Higashino
发明人： Satoru Higashino
IPC分类号： H03M7/00
CPC分类号： H03M5/145 , G11B20/10083 , G11B20/10101 , G11B20/10111 , G11B20/1426
摘要： A modulation apparatus includes: a modulation section that modulates, in accordance with a correlation table where a data sequence with a predetermined number of bits is associated with a code sequence with a predetermined number of bits, the data sequence into the code sequence to allow a predetermined demodulation section to demodulate the code sequence into the data sequence in accordance with the correlation table, wherein the code sequence is, on NRZI method, a MSN code sequence where a null point of a frequency spectrum on a recording channel or communication channel of the code sequence is matched with a null point of a frequency spectrum of a PR equalized signal including the code sequence and a minimum run length is limited to be greater or equal to one.
摘要翻译：一种调制装置，包括：调制部，其根据相关表，其中具有预定位数的数据序列与预定位数的码序列相关联，将数据序列调制成码序列，以允许预定解调部分，用于根据相关表将码序列解调成数据序列，其中码序列是以NRZI方法的MSN码序列，其中在记录信道或通信信道上的频谱的零点代码序列与包括代码序列的PR均衡信号的频谱的零点匹配，并且最小游程长度被限制为大于或等于1。

8. 发明申请

US20110149704A1 SIGNAL EVALUATION METHOD AND SIGNAL EVALUATION APPARATUS 有权
标题翻译：信号评估方法和信号评估装置
公开(公告)号：US20110149704A1
公开(公告)日：2011-06-23
申请号：US13034762
申请日：2011-02-25
申请人： Harumitsu MIYASHITA , Kohei NAKATA , Yasumori HINO , Naohiro KIMURA
发明人： Harumitsu MIYASHITA , Kohei NAKATA , Yasumori HINO , Naohiro KIMURA
IPC分类号： G11B20/18 , G11B20/12 , G11B7/24 , G11B7/00
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10111 , G11B20/1012 , G11B20/10212 , G11B20/10277 , G11B20/10296 , G11B20/10361 , G11B20/1037 , G11B20/10398 , G11B20/10472 , G11B20/10481 , G11B20/1816 , G11B20/182 , G11B20/225 , G11B2220/2541
摘要： A signal evaluation method according to the present invention is a method for evaluating a read signal, retrieved from an information recording medium, based on a binarized signal generated from the read signal by a PRML method. The method includes the steps of: detecting the patterns of multiple paths associated with the binarized signal and merging into the same state; getting the ideal value of a correct pattern associated with the binarized signal and that of an erroneous pattern that is similar to, but different from, the correct pattern; calculating the difference between a distance from the ideal value of the correct pattern to the read signal and a distance from that of the erroneous pattern to the read signal; calculating, based on the difference, an expected error rate for each predetermined group of patterns by the PRML method; and calculating a standard deviation that is associated with a total error rate, which is obtained by adding together the error rates of the predetermined groups of patterns, and that is used for evaluating the read signal.
摘要翻译：根据本发明的信号评估方法是一种用于根据通过PRML方法从读取信号产生的二值化信号来评估从信息记录介质检索的读取信号的方法。该方法包括以下步骤：检测与二值化信号相关联的多个路径的模式并合并成相同的状态; 获得与二值化信号相关联的正确模式的理想值以及类似于但不同于正确模式的错误模式的理想值; 计算从正确图案的理想值到读取信号的距离与从错误图案到读取信号的距离之间的差; 基于差异，通过PRML方法计算每个预定组模式的预期误码率; 以及计算与总误差率相关联的标准偏差，其通过将预定组图案的误差率相加并且用于评估读取信号而获得。

9. 发明授权

US07852729B2 Optical disc apparatus with adjustable constraint length PRML 有权
标题翻译：具有可调约束长度PRML的光盘设备
公开(公告)号：US07852729B2
公开(公告)日：2010-12-14
申请号：US11092872
申请日：2005-03-30
申请人： Hiroyuki Minemura , Atsushi Kikugawa
发明人： Hiroyuki Minemura , Atsushi Kikugawa
IPC分类号： G11B27/30
CPC分类号： G11B20/10009 , G11B20/10055 , G11B20/10101 , G11B20/10111 , G11B20/1012 , G11B2007/0006 , G11B2020/10879
摘要： An optical disc apparatus implementing a PRML and capable of recording and reading a plurality of disc media with different recording densities, wherein read compatibility between drives is ensured without relying solely on the error correction capability of the ECC (error correction code). A phase comparator provided in a PLL compares each value of an input signal sequence with a designated threshold value in order to determine an edge. The optical disc apparatus can record and read a plurality of disc media with different recording densities while ensuring read compatibility.
摘要翻译：实现PRML并能够记录和读取具有不同记录密度的多个盘介质的光盘装置，其中确保驱动器之间的读取兼容性，而不依赖于ECC（纠错码）的纠错能力。 PLL中提供的相位比较器将输入信号序列的每个值与指定的阈值进行比较，以便确定边缘。光盘装置可以记录和读取具有不同记录密度的多个光盘介质，同时确保读取兼容性。

10. 发明授权

US07852728B2 Digital signal reproducing apparatus 有权
标题翻译：数字信号再现装置
公开(公告)号：US07852728B2
公开(公告)日：2010-12-14
申请号：US11995634
申请日：2006-07-20
申请人： Youichi Ogura , Tatsushi Hiraki , Yorikazu Takao
发明人： Youichi Ogura , Tatsushi Hiraki , Yorikazu Takao
IPC分类号： G11B7/00
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10083 , G11B20/10101 , G11B20/10111 , G11B20/10222 , G11B20/1403 , G11B2020/1287 , G11B2220/2562 , G11B2220/2575
摘要： A digital signal reproducing apparatus includes an analog to digital converter for sampling and quantizing a signal read from an optical recording medium in accordance with a reproduced clock having a frequency which is one-half of a channel bit frequency and outputting an obtained digital RF signal, an offset compensation circuit for reducing an offset component in an amplitude direction from the digital RF signal, and a simplified interpolation filter for reconstructing a signal indicating a predetermined pattern recorded in the optical recording medium from the output signal of the offset compensation circuit and outputting the reconstructed signal. A control operation is performed to reduce the magnitudes of respective values shown by first phase error information on a section with the predetermined pattern and by second phase error information on a section other than the section with the predetermined pattern.
摘要翻译：一种数字信号再生装置，具有模拟数字转换器，用于根据具有频率为通道位频率的二分之一的频率的再生时钟对从光记录介质读取的信号进行采样和量化，并输出所获得的数字RF信号，偏移补偿电路，用于减少来自数字RF信号的振幅方向上的偏移分量;以及简化内插滤波器，用于根据偏移补偿电路的输出信号重建指示记录在光学记录介质中的预定模式的信号，并输出重建信号。执行控制操作以减小具有预定模式的部分上的第一相位误差信息所示的各个值的大小以及除了具有预定模式的部分之外的部分的第二相位误差信息。

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