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51. 发明授权

US08045283B2 Amplitude-based approach for detection and classification of hard-disc defect regions 失效
标题翻译：基于幅度的硬盘缺陷区域检测和分类方法
公开(公告)号：US08045283B2
公开(公告)日：2011-10-25
申请号：US12729312
申请日：2010-03-23
申请人： Shaohua Yang , George Mathew , Yang Han , Zongwang Li , Yuan Xing Lee
发明人： Shaohua Yang , George Mathew , Yang Han , Zongwang Li , Yuan Xing Lee
IPC分类号： G11B27/36 , G11B5/02
CPC分类号： G11B20/1816 , G11B20/1883 , G11B2005/0018 , G11B2020/1823 , G11B2220/20 , G11B2220/2516
摘要： In a hard-disc drive, a defect region on the hard disc is classified as corresponding to either thermal asperity (TA) or media defect (MD) by generating two statistical measures. A first measure (e.g., α1) is based on (i) the magnitudes of one or both of signal values (e.g., equalizer input or output signal values) and the corresponding expected values of those signal values and (ii) the signs of one or both of the signal values and the expected signal values. A second measure (e.g., α2) is based on the magnitudes of one or both of the signal values and the expected signal values, but not the signs of either the signal values or the expected signal values. The two measures are then compared to determine whether the defect region corresponds to TA or MD.
摘要翻译：在硬盘驱动器中，通过产生两个统计测量值将硬盘上的缺陷区域分类为对应于热粗糙度（TA）或介质缺陷（MD）。第一测量（例如，α1）基于（i）信号值（例如，均衡器输入或输出信号值）中的一个或两个的大小以及那些信号值的相应期望值，以及（ii）一个或信号值和预期信号值两者。第二量度（例如，α2）基于信号值和预期信号值中的一个或两个的幅度，而不是信号值或期望信号值的符号。然后比较两个测量值以确定缺陷区域是否对应于TA或MD。

52. 发明申请

US20090235116A1 Systems and Methods for Regenerating Data from a Defective Medium 失效
标题翻译：从有缺陷的介质再生数据的系统和方法
公开(公告)号：US20090235116A1
公开(公告)日：2009-09-17
申请号：US12111902
申请日：2008-04-29
申请人： Weijun Tan , Shaohua Yang , George Mathew , Kelly Fitzpatrick , Hao Zhong , Yuan Xing Lee
发明人： Weijun Tan , Shaohua Yang , George Mathew , Kelly Fitzpatrick , Hao Zhong , Yuan Xing Lee
IPC分类号： G06F11/07
CPC分类号： G06F11/0793 , G06F11/0727 , G11B20/1816
摘要： Various embodiments of the present invention provide systems and methods for data regeneration. For example, a system for data regeneration is disclosed that includes a data input derived from the medium. A data detector and a data recovery system receive the data input. The data detector provides a first soft output, and the data recovery system provides a second soft output. The first soft output and the second soft output are provided to a multiplexer. A media defect detector performs a media defect detection process, and provides a defect flag that indicates whether the data input is derived form a defective portion of the medium. The defect flag is provided to the multiplexer where it is used to select whether the first soft output or the second soft output is provides as an extrinsic output.
摘要翻译：本发明的各种实施例提供了用于数据再生的系统和方法。例如，公开了一种用于数据再生的系统，其包括从介质导出的数据输入。数据检测器和数据恢复系统接收数据输入。数据检测器提供第一软输出，数据恢复系统提供第二软输出。第一软输出和第二软输出被提供给多路复用器。介质缺陷检测器执行介质缺陷检测处理，并且提供指示数据输入是否从介质的缺陷部分导出的缺陷标志。缺陷标志被提供给多路复用器，其中它用于选择第一软输出或第二软输出是作为外在输出提供。

53. 发明申请

US20110199699A1 FREQUENCY-BASED APPROACH FOR DETECTION AND CLASSIFICATION OF HARD-DISC DEFECT REGIONS 有权
标题翻译：基于频率的硬盘区缺陷检测和分类方法
公开(公告)号：US20110199699A1
公开(公告)日：2011-08-18
申请号：US12707820
申请日：2010-02-18
申请人： George Mathew , Yang Han , Shaohua Yang , Zongwang Li , Yuan Xing Lee
发明人： George Mathew , Yang Han , Shaohua Yang , Zongwang Li , Yuan Xing Lee
IPC分类号： G11B27/36
CPC分类号： G11B20/1816 , G11B19/041 , G11B27/36
摘要： In a hard-disc drive read channel, frequency-based measures are generated at two different data frequencies (e.g., 2T and DC) by applying a transform, such as a discrete Fourier transform (DFT), to signal values, such as ADC or equalizer output values, corresponding to, e.g., a 2T data pattern stored on the hard disc. The frequency-based measures are used to detect defect regions on the hard disc and/or to classify defect regions as being due to either thermal asperity (TA) or drop-out media defect (MD).
摘要翻译：在硬盘驱动读取通道中，通过将诸如离散付里叶变换（DFT）之类的变换应用于信号值（例如ADC或ADC），以两个不同的数据频率（例如，2T和DC）生成基于频率的测量均衡器输出值，对应于例如存储在硬盘上的2T数据模式。基于频率的测量用于检测硬盘上的缺陷区域和/或将缺陷区域分类为由于热粗糙度（TA）或脱落介质缺陷（MD）引起的。

54. 发明授权

US07929240B2 Systems and methods for adaptive MRA compensation 有权
标题翻译：用于自适应MRA补偿的系统和方法
公开(公告)号：US07929240B2
公开(公告)日：2011-04-19
申请号：US12337775
申请日：2008-12-18
申请人： George Mathew , Yuan Xing Lee , Harley Burger , Li Du
发明人： George Mathew , Yuan Xing Lee , Harley Burger , Li Du
IPC分类号： G11B5/03 , G11B5/035
CPC分类号： G11B20/10203 , G11B20/10194 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for reducing head distortion. For example, various embodiments of the present invention provide storage devices that include a storage medium, a read/write head assembly, and an adaptive distortion modification circuit. The storage medium includes information that may be sensed by the read/write head assembly that is disposed in relation to the storage medium. The adaptive distortion modification circuit receives the information sensed by the read/write head assembly and adaptively estimates and implements a distortion compensation factor in the analog domain. In some instances of the aforementioned embodiments, the read/write head assembly includes a magneto resistive head. In such instances, the distortion compensation factor is designed to compensate for non-linear distortion introduced by the magneto resistive head.
摘要翻译：本发明的各种实施例提供了减少磁头失真的系统和方法。例如，本发明的各种实施例提供了包括存储介质，读/写头组件和自适应失真修改电路的存储设备。存储介质包括可以由相对于存储介质设置的读/写头组件感测到的信息。自适应失真修改电路接收由读/写头组件感测的信息，并自适应地估计并实现模拟域中的失真补偿因子。在上述实施例的一些情况下，读/写头组件包括磁阻头。在这种情况下，失真补偿因子被设计为补偿由磁阻头引入的非线性失真。

55. 发明申请

US20100157464A1 Systems and Methods for Adaptive MRA Compensation 有权
标题翻译：自适应MRA补偿的系统和方法
公开(公告)号：US20100157464A1
公开(公告)日：2010-06-24
申请号：US12337775
申请日：2008-12-18
申请人： George Mathew , Yuan Xing Lee , Harley Burger , Li Du
发明人： George Mathew , Yuan Xing Lee , Harley Burger , Li Du
IPC分类号： G11B21/02 , G11B5/33
CPC分类号： G11B20/10203 , G11B20/10194 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for reducing head distortion. For example, various embodiments of the present invention provide storage devices that include a storage medium, a read/write head assembly, and an adaptive distortion modification circuit. The storage medium includes information that may be sensed by the read/write head assembly that is disposed in relation to the storage medium. The adaptive distortion modification circuit receives the information sensed by the read/write head assembly and adaptively estimates and implements a distortion compensation factor in the analog domain. In some instances of the aforementioned embodiments, the read/write head assembly includes a magneto resistive head. In such instances, the distortion compensation factor is designed to compensate for non-linear distortion introduced by the magneto resistive head.
摘要翻译：本发明的各种实施例提供了减少磁头失真的系统和方法。例如，本发明的各种实施例提供了包括存储介质，读/写头组件和自适应失真修改电路的存储设备。存储介质包括可以由相对于存储介质设置的读/写头组件感测到的信息。自适应失真修改电路接收由读/写头组件感测的信息，并自适应地估计并实现模拟域中的失真补偿因子。在上述实施例的一些情况下，读/写头组件包括磁阻头。在这种情况下，失真补偿因子被设计为补偿由磁阻头引入的非线性失真。

56. 发明申请

US20120284585A1 Systems and Methods for Queue Based Data Detection and Decoding 有权
标题翻译：基于队列数据检测和解码的系统和方法
公开(公告)号：US20120284585A1
公开(公告)日：2012-11-08
申请号：US13547940
申请日：2012-07-12
申请人： Shaohua Yang , Hao Zhong , Weijun Tan , Richard Rauschmayer , Yuan Xing Lee
发明人： Shaohua Yang , Hao Zhong , Weijun Tan , Richard Rauschmayer , Yuan Xing Lee
IPC分类号： H03M13/29 , G06F11/10
CPC分类号： H03M13/2987 , G11B20/18 , G11B2020/185 , G11B2220/2516 , H03M13/09 , H03M13/1102 , H03M13/1111 , H03M13/15 , H03M13/1515 , H03M13/27 , H03M13/3905 , H03M13/4146 , H03M13/6331 , H03M13/6337 , H04L1/005 , H04L1/0057 , H04L1/0065
摘要： Various embodiments of the present invention provide systems and methods for variable iteration data processing.
摘要翻译：本发明的各种实施例提供了用于可变迭代数据处理的系统和方法。

57. 发明授权

US08149527B2 Systems and methods for reducing attenuation of information derived from a defective medium 有权
标题翻译：用于减少从有缺陷介质得到的信息衰减的系统和方法
公开(公告)号：US08149527B2
公开(公告)日：2012-04-03
申请号：US12111889
申请日：2008-04-29
申请人： Weijun Tan , Hao Zhong , Yuan Xing Lee , Richard Rauschmayer , Shaohua Yang , Harley Burger , Kelly Fitzpatrick , Changyou Xu
发明人： Weijun Tan , Hao Zhong , Yuan Xing Lee , Richard Rauschmayer , Shaohua Yang , Harley Burger , Kelly Fitzpatrick , Changyou Xu
IPC分类号： G11B5/02 , G11B27/36 , G11B5/09
CPC分类号： G11B20/18 , G11B20/10009 , G11B20/10287 , G11B20/10296 , H03M13/3905 , H03M13/3961 , H03M13/4146 , H03M13/6343 , H03M13/658
摘要： Various embodiments of the present invention provide systems and methods for data regeneration. For example, a method for data regeneration is disclosed that includes receiving a data input derived from a medium, determining a media defect corresponding to the data input, and determining an attenuation factor associated with the defective medium. Based at least in part on the determination that the medium is defective, amplifying the data input by a derivative of the attenuation factor to regenerate the data.
摘要翻译：本发明的各种实施例提供了用于数据再生的系统和方法。例如，公开了一种用于数据再生的方法，包括接收从介质导出的数据输入，确定与数据输入相对应的介质缺陷，以及确定与缺陷介质相关联的衰减因子。至少部分地基于介质有缺陷的确定，通过衰减因子的导数来放大输入的数据以再生数据。

58. 发明申请

US20110167227A1 Systems and Methods for Updating Detector Parameters in a Data Processing Circuit 有权
标题翻译：用于更新数据处理电路中检测器参数的系统和方法
公开(公告)号：US20110167227A1
公开(公告)日：2011-07-07
申请号：US12651956
申请日：2010-01-04
申请人： Shaohua Yang , Jonseung Park , Changyou Xu , Madhusudan Kalluri , Yuan Xing Lee , Kapil Gaba
发明人： Shaohua Yang , Jonseung Park , Changyou Xu , Madhusudan Kalluri , Yuan Xing Lee , Kapil Gaba
IPC分类号： G06F12/00 , G06F11/28
CPC分类号： H03M13/1111 , G11B2220/2516 , H03M13/3723
摘要： Various embodiments of the present invention provide systems and methods for updating detector parameters in a data processing circuit. For example, a data processing circuit is disclosed that includes a first detector circuit, a second detector circuit, and a calibration circuit. The first detector circuit is operable to receive a first data set and to apply a data detection algorithm to the first data set, and the second detector circuit is operable to receive a second data set and to apply the data detection algorithm to the second data set. The calibration circuit is operable to calculate a data detection parameter based upon a third data set. The data detection parameter is used by the first detector circuit in applying the data detection algorithm to the first data set during a period that the data detection parameter is used by the second detector circuit in applying the data detection algorithm to the second data set.
摘要翻译：本发明的各种实施例提供用于在数据处理电路中更新检测器参数的系统和方法。例如，公开了一种包括第一检测器电路，第二检测器电路和校准电路的数据处理电路。第一检测器电路可操作以接收第一数据集并将数据检测算法应用于第一数据集，并且第二检测器电路可操作以接收第二数据集并将数据检测算法应用于第二数据集。校准电路可操作以基于第三数据集计算数据检测参数。数据检测参数由第一检测器电路在将数据检测算法应用于第二数据集时由第二检测器电路使用的时段期间将数据检测算法应用于第一数据集使用。

59. 发明申请

US20110060973A1 Systems and Methods for Stepped Data Retry in a Storage System 有权
标题翻译：存储系统中步进数据重试的系统和方法
公开(公告)号：US20110060973A1
公开(公告)日：2011-03-10
申请号：US12556145
申请日：2009-09-09
申请人： Shaohua Yang , Weijun Tan , Yuan Xing Lee
发明人： Shaohua Yang , Weijun Tan , Yuan Xing Lee
IPC分类号： G06F11/07 , G06F12/02
CPC分类号： G11B20/1879 , G11B20/10527 , G11B2020/1062 , G11B2020/10694 , G11B2020/10851 , G11B2020/183 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for data processing retries. As an example, a data processing retry circuit is discussed that includes a stepped erasure window register, and an erasure flag set circuit. The stepped erasure window register includes: an erasure flag location, an erasure flag length, and a step size. The erasure flag set circuit is operable to assert a first erasure flag beginning at the erasure flag location and having the erasure flag length at a first time. In addition, the erasure flag set circuit is operable to assert a second erasure flag beginning at the erasure flag location plus the step size, and having the erasure flag length at a second time.
摘要翻译：本发明的各种实施例提供了用于数据处理重试的系统和方法。作为示例，讨论了包括阶梯式擦除窗口寄存器和擦除标志设置电路的数据处理重试电路。阶梯式擦除窗口寄存器包括：擦除标志位置，擦除标志长度和步长。擦除标志设置电路可操作来断言在擦除标志位置开始的第一擦除标志，并且在第一时间具有擦除标志长度。此外，擦除标志设置电路可操作来断言从擦除标志位置开始的第二擦除标志加上步长，并且第二次具有擦除标志长度。

60. 发明申请

US20100322048A1 Systems and Methods for Codec Usage Control During Storage Pre-read 有权
标题翻译：存储预读期间编码器使用控制的系统和方法
公开(公告)号：US20100322048A1
公开(公告)日：2010-12-23
申请号：US12487638
申请日：2009-06-18
申请人： Shaohua Yang , Yuan Xing Lee , Changyou Xu , Richard Rauschmayer , Harley Burger , Kapil Gaba
发明人： Shaohua Yang , Yuan Xing Lee , Changyou Xu , Richard Rauschmayer , Harley Burger , Kapil Gaba
IPC分类号： G11B20/00
CPC分类号： G11B20/10527 , G11B20/10194 , G11B2020/10694 , G11B2020/10805 , G11B2220/2516 , H03M13/1102 , H03M13/2957 , H03M13/6343
摘要： Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing circuit is disclosed that includes an increased iteration enable signal, a first detector circuit, a second detector circuit, and a data decoding circuit. The first detector circuit receives a data set and performs a data detection on the data set to provide a detected data set. The data decoding circuit receives a derivative of the detected data set and performs a decoding process to provide a decoded data set. The decoded data set is provided to the second detector circuit based at least in part on an assertion level of the increased iteration enable signal.
摘要翻译：本发明的各种实施例提供了用于数据处理的系统和方法。例如，公开了一种数据处理电路，其包括增加的迭代使能信号，第一检测器电路，第二检测器电路和数据解码电路。第一检测器电路接收数据组并对数据集执行数据检测以提供检测数据集。数据解码电路接收检测数据组的导数，并进行解码处理，提供解码数据组。解码数据集至少部分地基于增加的迭代使能信号的断言电平被提供给第二检测器电路。

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