Systems and methods for utilizing circulant parity in a data processing system
    81.
    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
    82.
    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
    83.
    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。

    Systems and methods for low latency media defect detection
    84.
    发明授权
    Systems and methods for low latency media defect detection 有权
    用于低延迟介质缺陷检测的系统和方法

    公开(公告)号:US08139457B2

    公开(公告)日:2012-03-20

    申请号:US12236148

    申请日:2008-09-23

    IPC分类号: G11B20/18

    摘要: Various embodiments of the present invention provide systems and methods for media defect detection. For example, a media defect detection systems is disclosed that includes a data input derived from a medium, a fast envelope calculation circuit that receives the data input and provides a fast decay envelope value based on the data input, a slow envelope calculation circuit that receives the data input and provides a slow decay envelope value based on the data input, and a media defect detection circuit. The media defect detection circuit receives the slow decay envelope value and the fast decay envelope value, calculates a ratio value of the fast decay envelope value to the slow decay envelope value, and asserts a defect output based at least in part on the comparison of the ratio value to a defect threshold value.

    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,公开了一种媒体缺陷检测系统,其包括从介质导出的数据输入,快速包络计算电路,其接收数据输入并且基于数据输入提供快速衰减包络值;慢包络计算电路,其接收 数据输入并基于数据输入提供慢衰减包络值,以及介质缺陷检测电路。 媒体缺陷检测电路接收慢衰减包络值和快速衰减包络值,计算快速衰减包络值与慢衰减包络值的比值,并至少部分地基于比较来确定缺陷输出 比值到缺陷阈值。

    Detection of hard-disc defect regions using soft decisions
    85.
    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 Tri-Column Code Based Error Reduction
    86.
    发明申请
    Systems and Methods for Tri-Column Code Based Error Reduction 有权
    基于三列代码的错误减少的系统和方法

    公开(公告)号:US20100275099A1

    公开(公告)日:2010-10-28

    申请号:US12833959

    申请日:2010-07-10

    申请人: Weijun Tan

    发明人: Weijun Tan

    IPC分类号: H03M13/29 G06F11/10

    摘要: Various systems and methods for tri-column code based error reduction are disclosed herein. For example, a digital information system is disclosed that includes channel detector. Such a channel detector receives an encoded data set and provides an output representing the encoded data set. The exemplary system further includes a decoder that receives the first output and is operable to perform three slope parity checks on the received first output. In turn, the decoder provides another output representing the encoded data set.

    摘要翻译: 本文公开了用于基于三列码的错误减少的各种系统和方法。 例如,公开了包括信道检测器的数字信息系统。 这样的信道检测器接收编码数据集并提供表示编码数据集的输出。 该示例性系统还包括解码器,其接收第一输出并且可操作以对所接收的第一输出执行三个斜率奇偶校验。 反过来,解码器提供表示编码数据集的另一输出。

    Systems and Methods for Hard Decision Assisted Decoding
    87.
    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 code based error reduction
    88.
    发明授权
    Systems and methods for code based error reduction 有权
    基于代码的错误减少的系统和方法

    公开(公告)号:US07802163B2

    公开(公告)日:2010-09-21

    申请号:US11461283

    申请日:2006-07-31

    申请人: Weijun Tan

    发明人: Weijun Tan

    IPC分类号: H03M13/00

    摘要: Various systems and methods for code based error reduction. For example, in one digital information system including a channel detector and a decoder, the channel detector receives an encoded data set and is operable to perform a column parity check. The channel detector provides an output representing the encoded data set. The decoder receives the output from the channel detector and is operable to perform two checks. The two checks may be one of: two pseudo-random parity checks, a pseudo-random parity check and a slope parity check, and two slope parity checks. In addition, the decoder provides another output representing the encoded data set.

    摘要翻译: 用于基于代码的错误减少的各种系统和方法。 例如,在包括信道检测器和解码器的一个数字信息系统中,信道检测器接收编码数据集并且可操作以执行列奇偶校验。 信道检测器提供表示编码数据集的输出。 解码器接收来自信道检测器的输出,并可操作以执行两次检查。 两个检查可以是以下之一:两个伪随机奇偶校验,伪随机奇偶校验和斜率奇偶校验,以及两个斜率奇偶校验。 此外,解码器提供表示编码数据集的另一输出。

    Systems and methods for tri-column code based error reduction
    89.
    发明授权
    Systems and methods for tri-column code based error reduction 有权
    基于三列代码的错误减少的系统和方法

    公开(公告)号:US07779331B2

    公开(公告)日:2010-08-17

    申请号:US11461198

    申请日:2006-07-31

    申请人: Weijun Tan

    发明人: Weijun Tan

    IPC分类号: H03M13/00 G06F11/00

    摘要: Various systems and methods for tri-column code based error reduction are disclosed herein. For example, a digital information system is disclosed that includes channel detector. Such a channel detector receives an encoded data set and provides an output representing the encoded data set. The exemplary system further includes a decoder that receives the first output and is operable to perform three slope parity checks on the received first output. In turn, the decoder provides another output representing the encoded data set.

    摘要翻译: 本文公开了用于基于三列码的错误减少的各种系统和方法。 例如,公开了包括信道检测器的数字信息系统。 这样的信道检测器接收编码数据集并提供表示编码数据集的输出。 该示例性系统还包括解码器,其接收第一输出并且可操作以对所接收的第一输出执行三个斜率奇偶校验。 反过来,解码器提供表示编码数据集的另一输出。

    Systems and Methods for Reduced Complexity Data Processing
    90.
    发明申请
    Systems and Methods for Reduced Complexity Data Processing 审中-公开
    降低复杂性数据处理的系统和方法

    公开(公告)号:US20100185914A1

    公开(公告)日:2010-07-22

    申请号:US12527241

    申请日:2007-09-28

    申请人: Weijun Tan Hao Zhong

    发明人: Weijun Tan Hao Zhong

    IPC分类号: H03M13/27 G06F11/10 H03M13/05

    摘要: Various embodiments of the present invention provide systems and methods for processing information. For example, a decoding system is disclosed that includes a de-interleaver. The de-interleaver is operable to receive an interleaved codeword that includes two or more reduced codewords interleaved together. Further, the de-interleaver is operable to provide a representation of the two or more reduced codewords. The systems also include a decoder that is operable to decode the two or more reduced codewords. In some instances of the aforementioned embodiments, the decoder is an LDPC decoder that is tailored to the size of one or both of the two or more reduced codewords.

    摘要翻译: 本发明的各种实施例提供了用于处理信息的系统和方法。 例如,公开了包括解交织器的解码系统。 解交织器可操作以接收包含交织在一起的两个或更多个缩减码字的交错码字。 此外,解交织器可操作以提供两个或更多个缩减码字的表示。 该系统还包括可解码两个或更多个缩减码字的解码器。 在上述实施例的一些实例中,解码器是针对两个或更多个缩减码字中的一个或两个的大小而定制的LDPC解码器。