Frequency-based approach for detection and classification of hard-disc defect regions
    31.
    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。

    Systems and Methods for Determining Noise Components in a Signal Set
    32.
    发明申请
    Systems and Methods for Determining Noise Components in a Signal Set 有权
    用于确定信号组噪声分量的系统和方法

    公开(公告)号:US20110164669A1

    公开(公告)日:2011-07-07

    申请号:US12652201

    申请日:2010-01-05

    IPC分类号: H04B17/00

    CPC分类号: G11B20/10046 H04B17/345

    摘要: Various embodiments of the present invention provide systems and methods for estimating noise components in a received signal set. For example, one embodiment of the present invention provides a noise estimation circuit that includes a data detector circuit and a noise component calculation circuit. The data detector circuit receives a series of data samples and provides a detected output, and the noise component calculation circuit provides an electronics noise power output and a media noise power output each calculated based at least in part on the detected output and the series of data samples.

    摘要翻译: 本发明的各种实施例提供了用于估计接收信号组中的噪声分量的系统和方法。 例如,本发明的一个实施例提供了一种包括数据检测器电路和噪声分量计算电路的噪声估计电路。 数据检测器电路接收一系列数据样本并提供检测的输出,并且噪声分量计算电路提供电子噪声功率输出和媒体噪声功率输出,每个至少部分地基于所检测的输出和数据系列计算 样品。

    Systems and Methods for Storage Channel Testing
    33.
    发明申请
    Systems and Methods for Storage Channel Testing 有权
    存储通道测试的系统和方法

    公开(公告)号:US20100265608A1

    公开(公告)日:2010-10-21

    申请号:US12425757

    申请日:2009-04-17

    IPC分类号: G11B27/36

    CPC分类号: G11B20/182 G11B2220/2516

    摘要: Various embodiments of the present invention provide systems and methods for validating elements of storage devices. A an example, various embodiments of the present invention provide semiconductor devices that include a write path circuit, a read path circuit and a validation circuit. The write path circuit is operable to receive a data input and to convert the data input into write data suitable for storage to a storage medium. The read path circuit is operable to receive read data and to convert the read data into a data output. The validation circuit is operable to: receive the write data, augment the write data with a first noise sequence to yield a first augmented data series; and augment a derivative of the first augmented data series with a second noise sequence to yield the read data.

    摘要翻译: 本发明的各种实施例提供用于验证存储设备的元件的系统和方法。 作为示例,本发明的各种实施例提供包括写入路径电路,读取路径电路和验证电路的半导体器件。 写入路径电路可操作用于接收数据输入并将数据输入转换成适合于存储的写数据到存储介质。 读路径电路可操作以接收读数据并将读数据转换为数据输出。 验证电路可操作用于:接收写数据,用第一噪声序列增加写数据以产生第一增强数据序列; 并且用第二噪声序列来增加第一增强数据序列的导数以产生读取的数据。

    Systems and Methods for Using Intrinsic Data for Regenerating Data from a Defective Medium
    34.
    发明申请
    Systems and Methods for Using Intrinsic Data for Regenerating Data from a Defective Medium 有权
    使用内在数据从有缺陷的介质再生数据的系统和方法

    公开(公告)号:US20090235146A1

    公开(公告)日:2009-09-17

    申请号:US12111867

    申请日:2008-04-29

    IPC分类号: H03M13/45 G06F11/08

    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。

    Systems and methods for determining noise components in a signal set
    35.
    发明授权
    Systems and methods for determining noise components in a signal set 有权
    用于确定信号组中噪声分量的系统和方法

    公开(公告)号:US08743936B2

    公开(公告)日:2014-06-03

    申请号:US12652201

    申请日:2010-01-05

    IPC分类号: H04B17/00 H04Q1/20

    CPC分类号: G11B20/10046 H04B17/345

    摘要: Various embodiments of the present invention provide systems and methods for estimating noise components in a received signal set. For example, one embodiment of the present invention provides a noise estimation circuit that includes a data detector circuit and a noise component calculation circuit. The data detector circuit receives a series of data samples and provides a detected output, and the noise component calculation circuit provides an electronics noise power output and a media noise power output each calculated based at least in part on the detected output and the series of data samples.

    摘要翻译: 本发明的各种实施例提供了用于估计接收信号组中的噪声分量的系统和方法。 例如,本发明的一个实施例提供了一种包括数据检测器电路和噪声分量计算电路的噪声估计电路。 数据检测器电路接收一系列数据样本并提供检测的输出,并且噪声分量计算电路提供电子噪声功率输出和媒体噪声功率输出,每个至少部分地基于所检测的输出和数据系列计算 样品。

    Systems and methods for data recovery using enhanced sync mark location
    36.
    发明授权
    Systems and methods for data recovery using enhanced sync mark location 有权
    使用增强的同步标记位置进行数据恢复的系统和方法

    公开(公告)号:US08345369B2

    公开(公告)日:2013-01-01

    申请号:US12887317

    申请日:2010-09-21

    IPC分类号: G11B5/09

    摘要: Various embodiments of the present invention provide systems and methods for identifying a reproducible location on a storage medium. As an example, a circuit is discussed that includes a data storage circuit, a pattern comparison circuit, and a threshold comparison circuit. The data storage circuit is operable to store a first set of data samples corresponding to a region of interest. The pattern comparison circuit is operable to compare a subset of the first set of data samples with a subset of a second set of data samples corresponding to the region of interest. The pattern comparison circuit is operable to yield a match value corresponding to a degree of similarity between the first set of data samples with the subset of a second set of data samples. The threshold comparison circuit is operable to indicate an anchor point based at least in part on the magnitude of the match value relative to a threshold value.

    摘要翻译: 本发明的各种实施例提供用于识别存储介质上的可再现位置的系统和方法。 作为示例,讨论了包括数据存储电路,模式比较电路和阈值比较电路的电路。 数据存储电路可操作以存储对应于感兴趣区域的第一组数据样本。 模式比较电路可操作以将第一组数据样本的子集与对应于感兴趣区域的第二组数据样本的子集进行比较。 模式比较电路可操作以产生与第一组数据样本与第二组数据样本的子集之间的相似度对应的匹配值。 阈值比较电路可操作以至少部分地基于相对于阈值的匹配值的大小来指示锚定点。

    Systems and Methods for Sync Mark Detection
    37.
    发明申请
    Systems and Methods for Sync Mark Detection 有权
    用于同步标记检测的系统和方法

    公开(公告)号:US20120236428A1

    公开(公告)日:2012-09-20

    申请号:US13050048

    申请日:2011-03-17

    IPC分类号: G11B5/09 G01R25/00 G06F19/00

    CPC分类号: G11B5/59616

    摘要: Various embodiments of the present invention provide systems and methods for data processing. As an example, a data processing circuit is disclosed that includes an equalizer circuit and a data detection circuit. The equalizer circuit is operable to filter a series of samples based at least in part on a filter coefficient and to provide a corresponding series of filtered samples. The data detection circuit includes: a core data detector circuit and a coefficient determination circuit. The core data detector circuit is operable to perform a data detection process on the series of filtered samples and to provide a most likely path and a next most likely path. The coefficient determination circuit operable to update the filter coefficient based at least in part on the most likely path and the next most likely path.

    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,公开了包括均衡器电路和数据检测电路的数据处理电路。 均衡器电路可操作以至少部分地基于滤波器系数对一系列样本进行滤波,并提供相应的一系列滤波样本。 数据检测电路包括:核心数据检测器电路和系数确定电路。 核心数据检测器电路可操作以对一系列经滤波的样本执行数据检测处理,并提供最可能的路径和下一个最可能的路径。 系数确定电路可操作以至少部分地基于最可能的路径和下一个最可能的路径来更新滤波器系数。

    AMPLITUDE-BASED APPROACH FOR DETECTION AND CLASSIFICATION OF HARD-DISC DEFECT REGIONS
    38.
    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。

    Systems and Methods for Data Recovery
    39.
    发明申请
    Systems and Methods for Data Recovery 审中-公开
    数据恢复的系统和方法

    公开(公告)号:US20110205653A1

    公开(公告)日:2011-08-25

    申请号:US12712136

    申请日:2010-02-24

    IPC分类号: G11B27/36

    摘要: Various embodiments of the present invention provide systems and methods for identifying a reproducible location on a storage medium. As an example, a circuit is described that include a media defect detector and an anchor fixing circuit. The media defect detector is operable to identify a media defect, and the anchor fixing circuit is operable to identify a location relative to the media defect. The location is reproducible.

    摘要翻译: 本发明的各种实施例提供用于识别存储介质上的可再现位置的系统和方法。 作为示例,描述了包括介质缺陷检测器和锚固定电路的电路。 介质缺陷检测器可操作以识别介质缺陷,并且锚固定电路可操作以识别相对于介质缺陷的位置。 该位置是可重现的。

    FREQUENCY-BASED APPROACH FOR DETECTION AND CLASSIFICATION OF HARD-DISC DEFECT REGIONS
    40.
    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。