AMPLITUDE-BASED APPROACH FOR DETECTION AND CLASSIFICATION OF HARD-DISC DEFECT REGIONS
    51.
    发明申请
    AMPLITUDE-BASED APPROACH FOR DETECTION AND CLASSIFICATION OF HARD-DISC DEFECT REGIONS 失效
    用于检测和分类硬盘区缺陷区域的基于幅度的方法

    公开(公告)号:US20110235490A1

    公开(公告)日:2011-09-29

    申请号:US12729312

    申请日:2010-03-23

    IPC分类号: G11B27/36

    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., ∝1) 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., ∝2) 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) 一个或两个信号值和预期信号值。 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。

    Amplitude-based approach for detection and classification of hard-disc defect regions
    52.
    发明授权
    Amplitude-based approach for detection and classification of hard-disc defect regions 失效
    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

    IPC分类号: G11B27/36 G11B5/02

    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。

    Systems and methods for error correction using irregular low density parity check codes
    53.
    发明授权
    Systems and methods for error correction using irregular low density parity check codes 有权
    使用不规则低密度奇偶校验码进行纠错的系统和方法

    公开(公告)号:US08443250B2

    公开(公告)日:2013-05-14

    申请号:US12901816

    申请日:2010-10-11

    IPC分类号: H03M13/00

    摘要: Various embodiments of the present invention provide systems and methods for generating a code format. One method discussed includes: receiving a first matrix having a row width and a column height that is greater than one; incorporating a circulant into a first column of the first matrix; testing the first column for trapping sets, wherein at least one trapping set is identified; selecting a value to mitigate the identified trapping set; and augmenting the first matrix with a second matrix to yield a composite matrix. The second matrix has the selected value in the first column, and wherein the identified trapping set is mitigated.

    摘要翻译: 本发明的各种实施例提供了用于生成代码格式的系统和方法。 所讨论的一种方法包括:接收具有大于1的行宽度和列高度的第一矩阵; 将循环体结合到第一基质的第一柱中; 测试用于捕集组的第一列,其中识别至少一个捕集组; 选择一个值以减轻所识别的捕获集合; 以及用第二矩阵增加第一矩阵以产生复合矩阵。 第二矩阵在第一列中具有所选择的值,并且其中所识别的捕获集合被减轻。

    Systems and Methods for Error Correction Using Irregular Low Density Parity Check Codes
    55.
    发明申请
    Systems and Methods for Error Correction Using Irregular Low Density Parity Check Codes 有权
    使用不规则低密度奇偶校验码进行纠错的系统和方法

    公开(公告)号:US20120089883A1

    公开(公告)日:2012-04-12

    申请号:US12901816

    申请日:2010-10-11

    IPC分类号: H03M13/11 G06F11/10

    摘要: Various embodiments of the present invention provide systems and methods for generating a code format. One method discussed includes: receiving a first matrix having a row width and a column height that is greater than one; incorporating a circulant into a first column of the first matrix; testing the first column for trapping sets, wherein at least one trapping set is identified; selecting a value to mitigate the identified trapping set; and augmenting the first matrix with a second matrix to yield a composite matrix. The second matrix has the selected value in the first column, and wherein the identified trapping set is mitigated.

    摘要翻译: 本发明的各种实施例提供了用于生成代码格式的系统和方法。 所讨论的一种方法包括:接收具有大于1的行宽度和列高度的第一矩阵; 将循环体结合到第一基质的第一柱中; 测试用于捕集组的第一列,其中识别至少一个捕集组; 选择一个值以减轻所识别的捕获集合; 以及用第二矩阵增加第一矩阵以产生复合矩阵。 第二矩阵在第一列中具有所选择的值,并且其中所识别的捕获集合被减轻。

    FREQUENCY-BASED APPROACH FOR DETECTION AND CLASSIFICATION OF HARD-DISC DEFECT REGIONS
    56.
    发明申请
    FREQUENCY-BASED APPROACH FOR DETECTION AND CLASSIFICATION OF HARD-DISC DEFECT REGIONS 有权
    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

    IPC分类号: 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。

    Systems and Methods for Quasi-Cyclic LDPC Code Production and Decoding
    57.
    发明申请
    Systems and Methods for Quasi-Cyclic LDPC Code Production and Decoding 有权
    准循环LDPC码生成和解码的系统和方法

    公开(公告)号:US20110029835A1

    公开(公告)日:2011-02-03

    申请号:US12512257

    申请日:2009-07-30

    IPC分类号: H03M13/05 G06F11/10

    摘要: Various embodiments of the present invention provide systems and methods for generating a parity check matrix used in data processing. As an example, a method for generating a parity check matrix including selecting a non-affiliated variable node; identifying a check node of the lowest degree; connecting a first edge of the non-affiliated variable node to the identified check node; and connecting one or more additional edges of the non-affiliated variable node to check nodes in accordance with a quasi-cyclic constraint associated with a circulant is disclosed.

    摘要翻译: 本发明的各种实施例提供用于生成在数据处理中使用的奇偶校验矩阵的系统和方法。 作为示例,生成奇偶校验矩阵的方法,包括选择非附属变量节点; 识别最低度的校验节点; 将非关联变量节点的第一边缘连接到所识别的校验节点; 并且公开了根据与循环体相关联的准循环约束将非附属变量节点的一个或多个附加边缘连接到校验节点。

    Variable Sector Size Interleaver
    58.
    发明申请
    Variable Sector Size Interleaver 审中-公开
    可变扇区大小交织器

    公开(公告)号:US20130139023A1

    公开(公告)日:2013-05-30

    申请号:US13305551

    申请日:2011-11-28

    IPC分类号: G06F12/06 G06F11/10 H03M13/05

    摘要: Various embodiments of the present invention are related to methods and apparatuses for interleaving data, and more particularly to methods and apparatuses for interleaving variably sized blocks of data. For example, in one embodiment an apparatus includes a data partitioner operable to partition the block of data into a real data portion and a missing bits portion. The real data portion is adapted to contain data bits from the variably sized block of data and the missing bits portion is adapted to be filled with a variable number of the data bits. The apparatus also includes at least one local interleaver operable to apply a permutation across each of a plurality of sub-portions of the real data portion and the missing bits portion, and a global interleaver operable to apply a global permutation across the real data portion.

    摘要翻译: 本发明的各种实施例涉及用于交织数据的方法和装置,更具体地涉及用于交织可变大小的数据块的方法和装置。 例如,在一个实施例中,装置包括可操作以将数据块划分成实数据部分和丢失位部分的数据分割器。 实数据部分适于包含来自可变大小的数据块的数据位,并且丢失位部分适于用可变数目的数据位填充。 该装置还包括至少一个本地交织器,其可操作以对实数据部分和丢失比特部分的多个子部分中的每一个应用置换,以及全局交织器,其可操作以跨实际数据部分应用全局置换。

    Systems and Methods for Power Monitoring in a Variable Data Processing System
    59.
    发明申请
    Systems and Methods for Power Monitoring in a Variable Data Processing System 审中-公开
    可变数据处理系统中功率监控的系统和方法

    公开(公告)号:US20120330584A1

    公开(公告)日:2012-12-27

    申请号:US13167760

    申请日:2011-06-24

    IPC分类号: G06F19/00

    摘要: Various embodiments of the present invention provide systems and methods for data processing. As an example, a data processing circuit is discussed that includes: a data detector circuit, a data decoder circuit, and a power monitor circuit. The data detector circuit is operable to apply a data detection algorithm to a data input and a decoded output to yield a detected output. The data decoder circuit is operable to apply a data decoding algorithm to the detected output to yield the decoded output. The power monitor circuit is operable to receive a first power status signal from the data detector circuit and a second power status from the data decoder circuit, and to calculate a power usage of a combination of at least the data detector circuit and the data decoder circuit. In such a system, a number of global iterations through a combination of the data decoder circuit and the data detector circuit is variable and both of the first power status signal and the second power status signal varies at least in part as a function of the number of global iterations.

    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。 作为示例,讨论了包括数据检测器电路,数据解码器电路和功率监视电路的数据处理电路。 数据检测器电路可操作以将数据检测算法应用于数据输入和解码输出,以产生检测到的输出。 数据解码器电路可操作以将数据解码算法应用于所检测的输出以产生解码的输出。 功率监控电路可操作以从数据检测器电路接收第一电源状态信号和来自数据解码器电路的第二电源状态,并且计算至少数据检测器电路和数据解码器电路的组合的功率使用 。 在这种系统中,通过数据解码器电路和数据检测器电路的组合的多个全局迭代是可变的,并且第一电力状态信号和第二电力状态信号两者至少部分地作为数字的函数而变化 的全局迭代。

    Frequency-based approach for detection and classification of hard-disc defect regions
    60.
    发明授权
    Frequency-based approach for detection and classification of hard-disc defect regions 有权
    基于频率的硬盘缺陷区域检测和分类方法

    公开(公告)号:US08031420B2

    公开(公告)日:2011-10-04

    申请号:US12707820

    申请日:2010-02-18

    IPC分类号: G11B27/36 G11B5/02

    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。