Methods and apparatus for selective data retention decoding in a hard disk drive
    2.
    发明授权
    Methods and apparatus for selective data retention decoding in a hard disk drive 有权
    用于在硬盘驱动器中进行选择性数据保存解码的方法和装置

    公开(公告)号:US08225183B2

    公开(公告)日:2012-07-17

    申请号:US12241919

    申请日:2008-09-30

    IPC分类号: H03M13/00

    摘要: Methods and apparatus are provided for improved physical re-read operations in a hard disk drive. The disclosed methods and apparatus selectively retain data in a hard disk drive. A signal is read in an iterative read channel by assigning a reliability metric to each of a plurality of segments in a read signal; repeating the assigning step for a plurality of read operations; and selectively retaining the segments based on the assigned reliability metric. The read signal can be obtained by positioning a transducer over a storage media. The reliability metric may be based on soft bit decisions; log likelihood ratios or a noise estimation of a given segment.

    摘要翻译: 提供了用于改进硬盘驱动器中物理重读操作的方法和装置。 所公开的方法和设备选择性地将数据保留在硬盘驱动器中。 通过将读取信号中的多个段中的每一个分配可靠度度量,在迭代读取通道中读取信号; 重复多个读取操作的分配步骤; 并且基于所分配的可靠性度量选择性地保留段。 可以通过将传感器定位在存储介质上来获得读取信号。 可靠性度量可以基于软比特决策; 对数似然比或给定段的噪声估计。

    Methods and Apparatus for Selective Data Retention Decoding in a Hard Disk Drive
    3.
    发明申请
    Methods and Apparatus for Selective Data Retention Decoding in a Hard Disk Drive 有权
    用于硬盘驱动器中选择性数据保留解码的方法和装置

    公开(公告)号:US20100083075A1

    公开(公告)日:2010-04-01

    申请号:US12241919

    申请日:2008-09-30

    IPC分类号: H03M13/05 G06F11/14

    摘要: Methods and apparatus are provided for improved physical re-read operations in a hard disk drive. The disclosed methods and apparatus selectively retain data in a hard disk drive. A signal is read in an iterative read channel by assigning a reliability metric to each of a plurality of segments in a read signal; repeating the assigning step for a plurality of read operations; and selectively retaining the segments based on the assigned reliability metric. The read signal can be obtained by positioning a transducer over a storage media. The reliability metric may be based on soft bit decisions; log likelihood ratios or a noise estimation of a given segment.

    摘要翻译: 提供了用于改进硬盘驱动器中物理重读操作的方法和装置。 所公开的方法和设备选择性地将数据保留在硬盘驱动器中。 通过将读取信号中的多个段中的每一个分配可靠度度量,在迭代读取通道中读取信号; 重复多个读取操作的分配步骤; 并且基于所分配的可靠性度量选择性地保留段。 可以通过将传感器定位在存储介质上来获得读取信号。 可靠性度量可以基于软比特决策; 对数似然比或给定段的噪声估计。

    Systems and methods for determining noise components in a signal set
    4.
    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 Determining Noise Components in a Signal Set
    5.
    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
    6.
    发明授权
    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:US07990642B2

    公开(公告)日:2011-08-02

    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。 验证电路可操作以:接收写入数据,用第一噪声序列增加写入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 utilizing circulant parity in a data processing system
    7.
    发明授权
    Systems and methods for utilizing circulant parity in a data processing system 有权
    在数据处理系统中利用循环奇偶校验的系统和方法

    公开(公告)号:US08458553B2

    公开(公告)日:2013-06-04

    申请号:US12510885

    申请日:2009-07-28

    IPC分类号: H03M13/00

    摘要: Various embodiments of the present invention provide systems and methods for data processing. For example, a method for data processing is disclosed that includes receiving a codeword that has at least a first circulant with a plurality of data bits and a first circulant parity bit, a second circulant with a plurality of data bits and a second circulant parity bit, and one or more codeword parity bits. The methods further include decoding the codeword using the one or more codeword parity bits to access the first circulant and the second circulant, performing a first circulant parity check on the first circulant, and performing a second circulant parity check on the second circulant.

    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,公开了一种用于数据处理的方法,其包括:接收具有至少第一循环的码字,其具有多个数据位和第一循环奇偶校验位,第二循环具有多个数据位和第二循环奇偶校验位 ,以及一个或多个码字奇偶校验位。 所述方法还包括使用所述一个或多个码字奇偶校验比特来解码所述码字,以访问所述第一循环和所述第二循环,对所述第一循环执行第一循环奇偶校验,以及对所述第二循环执行第二循环奇偶校验。

    Interleaver and de-interleaver for iterative code systems
    9.
    发明授权
    Interleaver and de-interleaver for iterative code systems 失效
    用于迭代代码系统的交织器和解交织器

    公开(公告)号:US08205123B2

    公开(公告)日:2012-06-19

    申请号:US12315601

    申请日:2008-12-04

    IPC分类号: H03M13/27

    摘要: In exemplary embodiments, a skewed interleaving function for iterative code systems is described. The skewed interleaving function provides a skewed row and column memory partition and a layered structure for re-arranging data samples read from, for example, a first channel detector. An iterative decoder, such as an iterative decoder based on a low-density parity-check code (LDPC), might employ an element to de-skew the data from the interleaved memory partition before performing iterative decoding of the data, and then re-skew the information before passing decoded samples to the de-interleaver. The de-interleaver re-arranges the iterative decoded data samples in accordance with an inverse of the interleaver function before passing the decoded data samples to, for example, a second channel detector.

    摘要翻译: 在示例性实施例中,描述了用于迭代代码系统的偏斜交错功能。 倾斜交错功能提供了一个倾斜的行和列存储器分区以及用于重新排列从例如第一通道检测器读取的数据样本的分层结构。 诸如基于低密度奇偶校验码(LDPC)的迭代解码器的迭代解码器可以在执行数据的迭代解码之前采用去除来自交错存储器分区的数据的元素, 在将解码的样本传递到解交织器之前,将信息偏移。 解交织器在将解码的数据样本传递到例如第二信道检测器之前,根据交织器功能的反向重新排列迭代解码的数据样本。

    Amplitude-based approach for detection and classification of hard-disc defect regions
    10.
    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。