Interleaver and de-interleaver for iterative code systems
    51.
    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。

    Detection of hard-disc defect regions using soft decisions
    52.
    发明授权
    Detection of hard-disc defect regions using soft decisions 有权
    使用软判决检测硬盘缺陷区域

    公开(公告)号:US08089713B2

    公开(公告)日:2012-01-03

    申请号:US12731381

    申请日:2010-03-25

    IPC分类号: G11B27/36 H03M13/03

    摘要: In a hard-disc drive, a defect region on the hard disc is detected by generating two statistical measures (e.g., β1(k) and β2(k)) based on signal values (e.g., x[n] or y[n]) and soft-decision values (e.g., L[n]) corresponding to the signal values. The measures are compared to detect the location of the defect region of the hard drive. Using the soft-decision values reduces fluctuations in a ratio of the statistical measures compared to a ratio formed from statistical measures that are not based on soft-decision values, resulting in a more-reliable test for detecting defect regions.

    摘要翻译: 在硬盘驱动器中,通过基于信号值(例如,x [n]或x(n))生成两个统计度量(例如,&bgr; 1(k)和&bgr; 2(k))来检测硬盘上的缺陷区域 y [n])和软判决值(例如,L [n])。 比较措施来检测硬盘驱动器缺陷区域的位置。 使用软判决值可减少统计度量与由不基于软判决值的统计测量形成的比率的比率的波动,导致检测缺陷区域的更可靠的测试。

    Systems and Methods for Hard Decision Assisted Decoding
    53.
    发明申请
    Systems and Methods for Hard Decision Assisted Decoding 有权
    硬判决辅助解码的系统和方法

    公开(公告)号:US20100275096A1

    公开(公告)日:2010-10-28

    申请号:US12430927

    申请日:2009-04-28

    IPC分类号: H03M13/00 G06F11/00

    摘要: Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing system is disclosed that includes a processing loop circuit having a data detector and a soft decision decoder. The data detector provides a detected output, and the soft decision decoder applies a soft decoding algorithm to a derivative of the detected output to yield a soft decision output and a first hard decision output. The systems further include a queuing buffer and a hard decision decoder. The queuing buffer is operable to store the soft decision output, and the hard decision decoder accesses the soft decision output and applies a hard decoding algorithm to yield a second hard decision output. The data detector is operable to perform a data detection on a derivative of the soft decision output if the soft decision decoder and the hard decision decoder fail to converge

    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,公开了一种包括具有数据检测器和软判决解码器的处理环路电路的数据处理系统。 数据检测器提供检测输出,软判决解码器将软解码算法应用于检测输出的导数,以产生软决策输出和第一硬决策输出。 该系统还包括排队缓冲器和硬判决解码器。 排队缓冲器可操作以存储软判决输出,并且硬判决解码器访问软决策输出并应用硬解码算法以产生第二硬决策输出。 如果软判决解码器和硬判决解码器不能收敛,则数据检测器可操作以对软决策输出的导数执行数据检测

    Systems and Methods for Regenerating Data from a Defective Medium
    54.
    发明申请
    Systems and Methods for Regenerating Data from a Defective Medium 失效
    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

    IPC分类号: G06F11/07

    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 calibration coasting in a data processing system
    55.
    发明授权
    Systems and methods for calibration coasting in a data processing system 有权
    用于在数据处理系统中校准滑行的系统和方法

    公开(公告)号:US09129653B2

    公开(公告)日:2015-09-08

    申请号:US13452722

    申请日:2012-04-20

    IPC分类号: G01B5/28 G11B20/18

    摘要: The present inventions are related to systems and methods for data processing, and more particularly to systems and methods for coasting one or more calibration loops based upon identification of a probability of data inaccuracies. One embodiment is a data processing system that includes: a defect detector circuit operable to identify a defect region during a first pass processing of a received data set; a defect location buffer operable to maintain an indication of the defect region in the received data set; and a calibration circuit operable to adaptively update a calibration output during a second pass processing of the received data set, where updating the calibration output is disabled for one or more samples of the received data set corresponding to the indication of the defect region.

    摘要翻译: 本发明涉及用于数据处理的系统和方法,更具体地涉及用于基于识别数据不准确概率来滑动一个或多个校准循环的系统和方法。 一个实施例是一种数据处理系统,其包括:缺陷检测器电路,用于在接收数据集的第一遍处理期间识别缺陷区域; 缺陷位置缓冲器,其可操作以维持接收数据集中缺陷区域的指示; 以及校准电路,其可操作以在所述接收数据集的第二遍处理期间自适应地更新校准输出,其中对与所述缺陷区域的指示相对应的所接收的数据集的一个或多个样本的更新校准输出被禁用。

    Systems and methods for multilevel media defect detection
    56.
    发明授权
    Systems and methods for multilevel media defect detection 有权
    多层次介质缺陷检测的系统和方法

    公开(公告)号:US08745439B2

    公开(公告)日:2014-06-03

    申请号:US12425626

    申请日:2009-04-17

    IPC分类号: G06F11/10

    摘要: Various embodiments of the present invention provide systems and methods for deriving data from a defective media region. As an example, a method for deriving data from a defective media region is disclosed that includes providing a storage medium and performing a media defect detection that indicates a defective region on the storage medium. A first data decode is performed on data corresponding to the defective region. The first data decode yields a first output. It is determined that the first output failed to converge and based at least in part on the failure of the first output to converge, a second data decode is performed on the data corresponding to the defective region. The second data decode includes zeroing out any soft data corresponding to the defective region and providing a second output.

    摘要翻译: 本发明的各种实施例提供了用于从缺陷介质区域导出数据的系统和方法。 作为示例,公开了一种用于从缺陷介质区域导出数据的方法,其包括提供存储介质并执行指示存储介质上的缺陷区域的介质缺陷检测。 对与缺陷区域对应的数据执行第一数据解码。 第一个数据解码产生第一个输出。 确定第一输出不能收敛并且至少部分地基于第一输出的失败而收敛,对对应于该缺陷区域的数据执行第二数据解码。 第二数据解码包括将与缺陷区域对应的任何软数据清零并提供第二输出。

    Systems and methods for phase dependent data detection in iterative decoding
    58.
    发明授权
    Systems and methods for phase dependent data detection in iterative decoding 有权
    迭代解码中相位数据检测的系统和方法

    公开(公告)号:US08250431B2

    公开(公告)日:2012-08-21

    申请号:US12512235

    申请日:2009-07-30

    IPC分类号: H03M13/00

    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 a first data detection circuit that applies a phase dependent data detection algorithm to a data set such that a first output of the first data detection circuit varies depending upon a phase of the data set presented to the first data detection circuit. A first phase of the data set is presented to the first data detection circuit. The circuits further include a decoder circuit that applies a decoding algorithm to the first output to yield a decoded output, and a phase shift circuit that phase shifts the decoded output such that a second phase of the data set is provided as a phase shifted output. A second detection circuit applies a phase dependent data detection algorithm to the phase shifted output such that a second output of the second data detection circuit varies from the first output at least in part due to a different phase of the data set presented to the second data detection circuit.

    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,其包括第一数据检测电路,该第一数据检测电路将相关数据检测算法应用于数据组,使得第一数据检测电路的第一输出根据所呈现的数据集的相位而变化 第一数据检测电路。 将数据集的第一阶段呈现给第一数据检测电路。 这些电路还包括对第一输出应用解码算法以产生解码输出的解码器电路,以及相位移动电路,使得解码输出相移,使得提供数据组的第二相作为相移输出。 第二检测电路将相位相关数据检测算法应用于相移输出,使得第二数据检测电路的第二输出至少部分地由于呈现给第二数据的数据集的相位而从第一输出变化 检测电路。

    Systems and methods for enhanced flaw scan in a data processing device
    59.
    发明授权
    Systems and methods for enhanced flaw scan in a data processing device 有权
    用于在数据处理设备中增强缺陷扫描的系统和方法

    公开(公告)号:US08176400B2

    公开(公告)日:2012-05-08

    申请号:US12556180

    申请日:2009-09-09

    IPC分类号: H03M13/00

    CPC分类号: H04L1/0057 H04L1/0045

    摘要: Various embodiments of the present invention provide systems and methods for flaw scan in a data processing system. As one example, a data processing system is disclosed that includes a data detector circuit, a bit sign inverting circuit, and an LDPC decoder circuit. The data detector circuit receives a verification data set that is an invalid LDPC codeword, and applies a data detection algorithm to the verification data set to yield a detected output. The bit sign inverting circuit modifies the sign of one or more elements of a first derivative of the detected output to yield a second derivative of the detected output. The second derivative of the detected output is an expected valid LDPC codeword. The LDPC decoder circuit applies a decoding algorithm to the second derivative of the detected output to yield a decoded output.

    摘要翻译: 本发明的各种实施例提供了在数据处理系统中的缺陷扫描的系统和方法。 作为一个示例,公开了包括数据检测器电路,位符号反相电路和LDPC解码器电路的数据处理系统。 数据检测器电路接收作为无效LDPC码字的验证数据集,并将数据检测算法应用于验证数据集以产生检测到的输出。 位符号反相电路修改检测输出的一阶导数的一个或多个元素的符号,以产生检测到的输出的二阶导数。 所检测的输出的二阶导数是期望的有效LDPC码字。 LDPC解码器电路将解码算法应用于检测输出的二阶导数,以产生解码输出。

    Systems and methods for filter based media defect detection
    60.
    发明授权
    Systems and methods for filter based media defect detection 有权
    基于过滤器的介质缺陷检测的系统和方法

    公开(公告)号:US08121224B2

    公开(公告)日:2012-02-21

    申请号:US12111268

    申请日:2008-04-29

    IPC分类号: H04L27/06

    CPC分类号: H04L25/067 G01R31/31932

    摘要: Various embodiments of the present invention provide systems and methods for media defect detection. For example, a data receiving system is disclosed that includes a data signal provided from a medium that may include a defective portion. An absolute value circuit receives the data signal and provides an output corresponding to an absolute value of the data signal. The output corresponding to the absolute value of the data signal is input to a filter that filters it and provides a filtered output. In some cases, the filter is a digital filter operable to integrate the absolute value of the data signal. A comparator receives the output from the filter and compares it with a threshold value. The result of the comparison indicates a defect status of the medium.

    摘要翻译: 本发明的各种实施例提供了用于介质缺陷检测的系统和方法。 例如,公开了一种数据接收系统,其包括从可能包括缺陷部分的介质提供的数据信号。 绝对值电路接收数据信号并提供对应于数据信号的绝对值的输出。 与数据信号的绝对值相对应的输出被输入到过滤器并提供滤波输出的滤波器。 在某些情况下,滤波器是可以对数据信号的绝对值进行积分的数字滤波器。 比较器从滤波器接收输出并将其与阈值进行比较。 比较结果表明介质的缺陷状态。