Systems and methods for retry sync mark detection
    52.
    发明授权
    Systems and methods for retry sync mark detection 有权
    用于重试同步标记检测的系统和方法

    公开(公告)号:US08566378B2

    公开(公告)日:2013-10-22

    申请号:US12894221

    申请日:2010-09-30

    IPC分类号: G06F17/10

    摘要: Various embodiments of the present invention provide systems and methods for sync mark detection. As an example, a sync mark detection circuit is discussed that includes a storage circuit, a plurality of noise predictive filter circuits, and a controller circuit. The storage circuit is operable to store a data input as a stored input. The plurality of noise predictive filters are operable to receive a processing input. At least one of the noise predictive filters is selectably modifiable to either increase the probability of finding a sync mark in the processing input or to maintain a baseline probability of finding the sync mark in the processing input. The controller circuit is operable to determine an operational mode that may be a standard operational mode, a bit flipping mode, or a filter modification mode.

    摘要翻译: 本发明的各种实施例提供用于同步标记检测的系统和方法。 作为示例,讨论了包括存储电路,多个噪声预测滤波器电路和控制器电路的同步标记检测电路。 存储电路可操作以将数据输入存储为存储的输入。 多个噪声预测滤波器可操作以接收处理输入。 噪声预测滤波器中的至少一个可选地可修改以增加在处理输入中找到同步标记的概率,或者维持在处理输入中找到同步标记的基线概率。 控制器电路可操作以确定可以是标准操作模式,位翻转模式或滤波器修改模式的操作模式。

    Systems and methods for utilizing circulant parity in a data processing system
    53.
    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。

    Systems and Methods for Late Stage Precoding
    54.
    发明申请
    Systems and Methods for Late Stage Precoding 审中-公开
    晚期预编码系统与方法

    公开(公告)号:US20130111294A1

    公开(公告)日:2013-05-02

    申请号:US13284819

    申请日:2011-10-28

    IPC分类号: H03M13/29 G06F11/10

    摘要: Various embodiments of the present invention provide systems, devices and methods for data processing. As an example, a data processing device is discussed that include a data encoding system and a data decoding system. The data encoding system is operable to receive a data input, and to: apply a maximum transition run length encoding to the data input to yield a run length limited output; apply a low density parity check encoding algorithm to the run length limited output to yield a number of original parity bits; apply a precode algorithm to the original parity bits to yield precoded parity bits; and combine the precoded parity bits and a derivative of the run length limited output to yield an output data set.

    摘要翻译: 本发明的各种实施例提供用于数据处理的系统,设备和方法。 作为示例,讨论了包括数据编码系统和数据解码系统的数据处理装置。 数据编码系统可操作以接收数据输入,并且:对数据输入应用最大转换行程长度编码以产生行长限制输出; 将低密度奇偶校验编码算法应用于运行长度限制输出以产生多个原始奇偶校验位; 对原始奇偶校验位应用预编码算法以产生预编码奇偶校验位; 并将预编码的奇偶校验位和游程长度限制输出的导数组合以产生输出数据集。

    Interleaver and de-interleaver for iterative code systems
    55.
    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
    56.
    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
    57.
    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
    58.
    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
    59.
    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。

    Dynamic Y-buffer size adjustment for retained sector reprocessing
    60.
    发明授权
    Dynamic Y-buffer size adjustment for retained sector reprocessing 有权
    用于保留扇区再处理的动态Y缓冲区大小调整

    公开(公告)号:US09098105B2

    公开(公告)日:2015-08-04

    申请号:US13593648

    申请日:2012-08-24

    IPC分类号: G06F3/00 G11B20/10

    CPC分类号: G06F3/00 G11B20/10527

    摘要: Aspects of the disclosure pertain to a system and method for providing dynamic y-buffer size adjustment for retained sector reprocessing (RSR). The system and method implement dynamic y-buffer size adjustment for RSR for promoting improved Sector Failure Rate (SFR) performance of the system. The system is a read channel system.

    摘要翻译: 本公开的方面涉及用于为保留的扇区再处理(RSR)提供动态y缓冲器大小调整的系统和方法。 系统和方法为RSR实现动态y缓冲区大小调整,以促进系统的扇区故障率(SFR)性能的提高。 该系统是读通道系统。