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31. 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。

32. 发明授权

US08566381B2 Systems and methods for sequence detection in data processing 有权
标题翻译：数据处理中序列检测的系统和方法
公开(公告)号：US08566381B2
公开(公告)日：2013-10-22
申请号：US12851475
申请日：2010-08-05
申请人： Viswanath Annampedu
发明人： Viswanath Annampedu
IPC分类号： G06F17/15
CPC分类号： G11B20/10009 , G11B20/10055 , G11B20/10277 , G11B20/10296 , H03M13/4161 , H04L25/03184
摘要： Various embodiments of the present invention provide systems and methods for sequence detection. As an example, a method for data detection is disclosed that includes: receiving a series of data samples at a detector circuit; multiplying a portion of the series of data samples by a first correlator value corresponding to a first binary transition to yield a first value; multiplying the portion of the series of data samples by a second correlator value corresponding to a second binary transition to yield a second value; adding the first value to a prior state value to yield a first interim value; adding the second value to the prior state value to yield a second interim value; and selecting the larger of the first interim value and the second interim value to yield a surviving interim value.
摘要翻译：本发明的各种实施例提供了用于序列检测的系统和方法。作为示例，公开了一种用于数据检测的方法，包括：在检测器电路处接收一系列数据样本; 将所述一系列数据样本的一部分乘以对应于第一二进制转换的第一相关器值以产生第一值; 将所述一系列数据样本的所述部分乘以对应于第二二进制转换的第二相关器值以产生第二值; 将所述第一值添加到先前状态值以产生第一中间值; 将所述第二值添加到所述先前状态值以产生第二临时值; 并且选择第一临时值和第二临时值中较大的一个以产生存活的临时值。

33. 发明申请

US20120201112A1 REPRODUCTION SIGNAL EVALUATION METHOD, REPRODUCTION SIGNAL EVALUATION UNIT, AND OPTICAL DISK DEVICE ADOPTING THE SAME 失效
标题翻译：生殖信号评估方法，生殖信号评估单元和采用该方法的光盘装置
公开(公告)号：US20120201112A1
公开(公告)日：2012-08-09
申请号：US13434995
申请日：2012-03-30
申请人： Harumitsu Miyashita , Yasumori Hino , Junya Shiraishi , Shoei Kobayashi
发明人： Harumitsu Miyashita , Yasumori Hino , Junya Shiraishi , Shoei Kobayashi
IPC分类号： G11B7/00
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10046 , G11B20/10055 , G11B20/1012 , G11B20/10212 , G11B20/10277 , G11B20/10296 , G11B20/10361 , G11B20/1037 , G11B20/10398 , G11B20/10425 , G11B20/10472 , G11B20/10481 , G11B20/1816 , G11B20/182 , G11B20/22 , G11B2220/2541
摘要： A reproduction signal evaluation method evaluates the quality of a reproduction signal reproduced from an information recording medium based on a binary signal generated from the reproduction signal using a PRML signal processing system. A pattern extraction step extracts, from the binary signal, a specific state transition pattern which has the possibility of causing a bit error; a step computes a differential metric based on the binary signal; an extraction step extracts the differential metric which is not greater than a predetermined signal processing threshold; a step determines a mean value of the differential metrics which are not greater than the signal processing threshold and extracted in the extraction step; a standard deviation computing step determines a standard deviation which corresponds to an error rate predicted from the mean value; and an evaluation step evaluates a quality of the reproduction signal using the standard deviation.
摘要翻译：再现信号评估方法基于使用PRML信号处理系统从再现信号生成的二进制信号来评估从信息记录介质再现的再现信号的质量。模式提取步骤从二进制信号中提取具有引起位错误的可能性的特定状态转换模式; 步骤基于二进制信号计算差分度量; 提取步骤提取不大于预定信号处理阈值的差分度量; 步骤确定不大于信号处理阈值并在提取步骤中提取的差分度量的平均值; 标准偏差计算步骤确定与从平均值预测的误差率对应的标准偏差; 并且评估步骤使用标准偏差来评估再现信号的质量。

34. 发明授权

US08159918B2 Reproduction signal evaluation method, reproduction signal evaluation unit, and optical disk device adopting the same 失效
标题翻译：再现信号评估方法，再现信号评估单元和采用该方法的光盘装置
公开(公告)号：US08159918B2
公开(公告)日：2012-04-17
申请号：US12496096
申请日：2009-07-01
申请人： Harumitsu Miyashita , Yasumori Hino , Junya Shiraishi , Shoei Kobayashi
发明人： Harumitsu Miyashita , Yasumori Hino , Junya Shiraishi , Shoei Kobayashi
IPC分类号： G11B7/00
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10046 , G11B20/10055 , G11B20/1012 , G11B20/10212 , G11B20/10277 , G11B20/10296 , G11B20/10361 , G11B20/1037 , G11B20/10398 , G11B20/10425 , G11B20/10472 , G11B20/10481 , G11B20/1816 , G11B20/182 , G11B20/22 , G11B2220/2541
摘要： A reproduction signal evaluation method evaluates the quality of a reproduction signal reproduced from an information recording medium based on a binary signal generated from the reproduction signal using a PRML signal processing system. The method includes a pattern extraction step of extracting, from the binary signal, a specific state transition pattern which has the possibility of causing a bit error; a step of computing a differential metric based on the binary signal; an extraction step of extracting the differential metric which is not greater than a predetermined signal processing threshold; a step of determining a mean value of the differential metrics which are not greater than the signal processing threshold and extracted in the extraction step; a standard deviation computing step of determining a standard deviation which corresponds to an error rate predicted from the mean value; and an evaluation step of evaluating a quality of the reproduction signal using the standard deviation.
摘要翻译：再现信号评估方法基于使用PRML信号处理系统从再现信号生成的二进制信号来评估从信息记录介质再现的再现信号的质量。该方法包括：模式提取步骤，从二进制信号中提取具有引起位错误的可能性的特定状态转换模式; 基于二进制信号计算差分度量的步骤; 提取步骤，提取不大于预定信号处理阈值的差分度量; 确定不大于信号处理阈值并在提取步骤中提取的差分度量的平均值的步骤; 标准偏差计算步骤，用于确定与从所述平均值预测的误差率对应的标准偏差; 以及评估步骤，使用标准偏差来评估再现信号的质量。

35. 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。

36. 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。

37. 发明授权

US08051366B2 Data reproducing apparatus and data reproducing method 有权
标题翻译：数据再现装置和数据再现方法
公开(公告)号：US08051366B2
公开(公告)日：2011-11-01
申请号：US12833812
申请日：2010-07-09
申请人： Nobuhiro Maeto
发明人： Nobuhiro Maeto
IPC分类号： H03M13/00
CPC分类号： H03M13/3738 , G11B20/10009 , G11B20/10046 , G11B20/10277 , G11B20/10296 , G11B20/10305 , G11B20/1037 , G11B20/10462 , G11B20/18 , G11B20/1879 , G11B2020/10972 , G11B2020/183 , G11B2220/2516 , H03M13/13 , H03M13/3715 , H03M13/41 , H03M13/6343
摘要： According to one embodiment, a data reproducing apparatus includes a reader, Viterbi decoder, metric difference calculator, an error correction decoder, and a detector. The reader reads data. The Viterbi decoder decodes the data read by the reader. The metric difference calculator calculates a metric difference between a maximum likelihood path and a competitive path, based on an output from the Viterbi decoder. The error correction decoder executes an error correction decoding for the output of the Viterbi decoder. The detector detects that an error detected by the error correction decoder is uncorrectable, and the metric difference detected by the metric difference calculator is larger than a predetermined value.
摘要翻译：根据一个实施例，数据再现装置包括读取器，维特比解码器，度量差计算器，纠错解码器和检测器。读者读取数据。维特比解码器解码读取器读取的数据。度量差分计算器基于来自维特比解码器的输出来计算最大似然路径和竞争路径之间的度量差。纠错解码器对维特比解码器的输出执行纠错解码。检测器检测到错误校正解码器检测到的错误是不可校正的，并且由度量差计算器检测到的度量差异大于预定值。

38. 发明授权

US08049982B1 Methods and apparatus for measuring servo address mark distance in a read channel using selective fine phase estimate 有权
标题翻译：使用选择性精细相位估计在读通道中测量伺服地址标记距离的方法和装置
公开(公告)号：US08049982B1
公开(公告)日：2011-11-01
申请号：US12847676
申请日：2010-07-30
申请人： Jeffrey P. Grundvig , Viswanath Annampedu , Xun Zhang
发明人： Jeffrey P. Grundvig , Viswanath Annampedu , Xun Zhang
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10037 , G11B20/10074 , G11B20/1024 , G11B20/10277 , G11B20/14 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , G11B2220/2516
摘要： Methods and apparatus are provided for measuring servo address mark distance in a read channel using selective fine phase estimates. A distance between servo address marks (SAMs) in servo data of a magnetic recording media can be computed by obtaining a count of a number of time intervals between SAM patterns; obtaining a plurality of fractional phase estimates; selecting at least one of the plurality of fractional phase estimates as a selected fractional phase estimate based on a selection criteria; and combining the count and the selected fractional phase estimate to compute the distance. The fractional phase estimates can include a first fractional phase estimate having a lower resolution and higher accuracy in the presence of frequency errors relative to a second fractional phase estimate and wherein the second fractional phase estimate has more resolution and lower accuracy in the presence of the frequency errors relative to the first fractional phase estimate. The selection criteria can comprise a frequency error threshold.
摘要翻译：提供了使用选择性精细相位估计来测量读取通道中的伺服地址标记距离的方法和装置。可以通过获得SAM图案之间的时间间隔数的计数来计算磁记录介质的伺服数据中的伺服地址标记（SAM）之间的距离; 获得多个分数阶段估计; 基于选择标准来选择所述多个分数阶段估计中的至少一个作为选择的分数阶段估计; 并结合计数和所选择的分数相位估计来计算距离。分数阶段估计可以包括在存在相对于第二分数阶段估计的频率误差的情况下具有较低分辨率和较高精度的第一分数相位估计，并且其中第二分数相位估计在频率存在的情况下具有更高的分辨率和更低的精度相对于第一分数阶段估计的误差。选择标准可以包括频率误差阈值。

39. 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。

40. 发明申请

US20100246686A1 METHOD FOR DECODING UNDER OPTICAL AND ELECTRONIC NOISE 有权
标题翻译：光电噪声解码方法
公开(公告)号：US20100246686A1
公开(公告)日：2010-09-30
申请号：US12414263
申请日：2009-03-30
申请人： Aria Pezeshk , John Anderson Fergus Ross
发明人： Aria Pezeshk , John Anderson Fergus Ross
IPC分类号： H04N11/02
CPC分类号： G11B20/10009 , G11B20/10277 , G11B20/105 , G11B20/18 , G11B20/24 , G11B2020/1453 , G11B2220/2504 , G11B2220/2537
摘要： The present techniques provide systems and methods for decoding an optical data signal in an optical system to retrieve source information while decreasing errors resulting from optical and electronic noise in the optical system. The techniques involve using decoding algorithms to estimate the a posteriori state probabilities and the a posteriori transition probabilities of the data encoding, and estimating bit state probabilities. The probability density function used to estimate bit states is parameterized by the expected optical and electronic noise in the optical system. Different optical and electronic noise variances, or different probability densities, may be stored in registers or look-up tables to be accessed by a decoder while decoding the optical data signal.
摘要翻译：本技术提供了用于解码光学系统中的光学数据信号的系统和方法，用于检索源信息，同时减少由光学系统中的光学和电子噪声引起的误差。这些技术涉及使用解码算法来估计后验状态概率和数据编码的后验转移概率，以及估计比特状态概率。用于估计位状态的概率密度函数由光学系统中预期的光学和电子噪声参数化。可以将不同的光学和电子噪声方差或不同的概率密度存储在寄存器或查找表中，以在解码光学数据信号的同时被解码器访问。

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