Systems and methods for data detection using distance based tuning
    11.
    发明授权
    Systems and methods for data detection using distance based tuning 有权
    使用基于距离调谐的数据检测系统和方法

    公开(公告)号:US08699167B2

    公开(公告)日:2014-04-15

    申请号:US13310028

    申请日:2011-12-02

    CPC分类号: H04L25/03254 H04L25/0305

    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。

    Systems and methods for retry sync mark detection
    13.
    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 enhanced media defect detection
    14.
    发明授权
    Systems and methods for enhanced media defect detection 有权
    增强介质缺陷检测的系统和方法

    公开(公告)号:US08516348B2

    公开(公告)日:2013-08-20

    申请号:US13495922

    申请日:2012-06-13

    IPC分类号: H03M13/00

    摘要: Various embodiments of the present invention provide systems and methods for detecting storage medium defects. As one example, a media defect detection system is disclosed that includes a data detector circuit that applies a detection algorithm to the data input and provides a hard output and a soft output. A first circuit combines a first derivative of the hard output with a derivative of the data input to yield a first combined signal. A second circuit combines a second derivative of the hard output with a derivative of the first combined signal to yield a second combined signal. A third circuit combines a derivative of the soft output with the second combined signal and a threshold value to yield a defect signal.

    摘要翻译: 本发明的各种实施例提供了用于检测存储介质缺陷的系统和方法。 作为一个示例,公开了一种媒体缺陷检测系统,其包括将检测算法应用于数据输入并提供硬输出和软输出的数据检测器电路。 第一电路将硬输出的一阶导数与数据输入的导数组合以产生第一组合信号。 第二电路将硬输出的二阶导数与第一组合信号的导数组合以产生第二组合信号。 第三电路将软输出的导数与第二组合信号和阈值组合以产生缺陷信号。

    Systems and methods for utilizing circulant parity in a data processing system
    15.
    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
    16.
    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。

    METHOD FOR DETECTING SHORT BURST ERRORS IN LDPC SYSTEM
    17.
    发明申请
    METHOD FOR DETECTING SHORT BURST ERRORS IN LDPC SYSTEM 有权
    用于检测LDPC系统中短路脉冲误差的方法

    公开(公告)号:US20120226958A1

    公开(公告)日:2012-09-06

    申请号:US13469746

    申请日:2012-05-11

    IPC分类号: H03M13/11 G06F11/10

    CPC分类号: H03M13/1128 H03M13/17

    摘要: The present invention is a device for detecting short burst errors. The device includes a first signal input, wherein the first signal input is configured to receive a first signal. The device includes a second signal input, wherein the second signal input is configured to receive a second signal. The device includes a logic gate, wherein the logic gat is operable for receiving the first signal vial the first signal input, receiving the second signal via the second signal input, and generating a logic output gate signal based on the received first signal and the second signal. Furthermore, the device includes a filter, wherein the filter is configured for receiving the logic output gate signal from the logic gate and generates a filter output signal based upon the received logic output gate signal, wherein the filter output signal is operable for flagging errors.

    摘要翻译: 本发明是用于检测短脉冲串错误的装置。 该设备包括第一信号输入,其中第一信号输入被配置为接收第一信号。 该设备包括第二信号输入,其中第二信号输入被配置为接收第二信号。 该装置包括逻辑门,其中逻辑门可操作用于接收第一信号输入端,第一信号输入端经由第二信号输入端接收第二信号,并根据接收的第一信号和第二信号产生逻辑输出门信号 信号。 此外,该器件包括滤波器,其中滤波器被配置为从逻辑门接收逻辑输出门信号,并且基于接收的逻辑输出门信号产生滤波器输出信号,其中滤波器输出信号可用于标记误差。

    Interleaver and de-interleaver for iterative code systems
    18.
    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
    19.
    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
    20.
    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