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111 条记录 (耗时 0.02 秒)

    Systems and Methods for Media Defect Detection
    91.
    发明申请
    Systems and Methods for Media Defect Detection 有权
    介质缺陷检测系统与方法

    公开(公告)号：US20100042877A1

    公开(公告)日：2010-02-18

    申请号：US12527296

    申请日：2007-10-01

    申请人： Weijun Tan

    发明人： Weijun Tan

    IPC分类号： G06F11/00 ,  G06F11/07 ,  G06F11/10 ,  H03M13/41

    CPC分类号： G06F11/0751 ,  G11B20/1816 ,  H04L1/0051 ,  H04L1/0055

    摘要： Various embodiments of the present invention provide systems and methods for media defect detection. For example, a data transfer system is disclosed that includes a data detector, a defect detector and a gating circuit. The data detector provides a soft output, and the defect detector is operable to receive the soft output and the data signal, and to assert a defect indication based at least in part on the soft output and the data signal. The gating circuit is operable to modify the soft output of the detector whenever the defect indication is asserted.

    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，公开了一种数据传输系统，其包括数据检测器，缺陷检测器和门控电路。 数据检测器提供软输出，并且缺陷检测器可操作以接收软输出和数据信号，并且至少部分地基于软输出和数据信号来断言缺陷指示。 门控电路可操作以在故障指示被断言时修改检测器的软输出。

    Systems and Methods for Regenerating Data from a Defective Medium
    92.
    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

    申请人： Weijun Tan ,  Shaohua Yang ,  George Mathew ,  Kelly Fitzpatrick ,  Hao Zhong ,  Yuan Xing Lee

    发明人： Weijun Tan ,  Shaohua Yang ,  George Mathew ,  Kelly Fitzpatrick ,  Hao Zhong ,  Yuan Xing Lee

    IPC分类号： G06F11/07

    CPC分类号： G06F11/0793 ,  G06F11/0727 ,  G11B20/1816

    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 Code Dependency Reduction
    93.
    发明申请
    Systems and Methods for Code Dependency Reduction 有权
    代码依赖减少的系统和方法

    公开(公告)号：US20080065970A1

    公开(公告)日：2008-03-13

    申请号：US11461026

    申请日：2006-07-31

    申请人： Weijun Tan

    发明人： Weijun Tan

    IPC分类号： G06F11/00 ,  H03M13/00

    CPC分类号： G11B20/1833 ,  G11B2220/2516 ,  H03M13/1102 ,  H03M13/4146

    摘要： Various systems and methods for code dependency reduction are disclosed herein. For example, one method includes receiving an un-encoded data set that is represented as an array of columns and rows. In addition, two groups of data bits traversing the un-encoded data set at respective angles are formed. Based at least in part on the aforementioned groups of data sets, an angle at which a third group of data bits will traverse the un-encoded data set is identified, and a third group of data bits traversing the un-encoded data set at the third angle is formed.

    摘要翻译： 本文公开了用于代码依赖性降低的各种系统和方法。 例如，一种方法包括接收被表示为列和行的数组的未编码数据集。 此外，形成以各个角度遍历未编码数据集的两组数据位。 至少部分地基于上述数据组群，识别第三组数据位将穿过未编码数据集的角度，并且在第三组数据位中遍历未编码数据集 形成第三角度。

    Systems and methods for low latency media defect detection
    94.
    发明授权
    Systems and methods for low latency media defect detection 有权

    公开(公告)号：US08875005B2

    公开(公告)日：2014-10-28

    申请号：US13368599

    申请日：2012-02-08

    申请人： Yang Cao ,  Scott M. Dziak ,  Nayak Ratnakar Aravind ,  Richard Rauschmayer ,  Weijun Tan

    发明人： Yang Cao ,  Scott M. Dziak ,  Nayak Ratnakar Aravind ,  Richard Rauschmayer ,  Weijun Tan

    IPC分类号： G06F11/00

    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.

    Systems and methods for data detection including dynamic scaling
    96.
    发明授权
    Systems and methods for data detection including dynamic scaling 有权
    用于数据检测的系统和方法，包括动态缩放

    公开(公告)号：US08683306B2

    公开(公告)日：2014-03-25

    申请号：US12651547

    申请日：2010-01-04

    申请人： Shaohua Yang ,  Weijun Tan ,  Zongwang Li ,  Kiran Gunnam

    发明人： Shaohua Yang ,  Weijun Tan ,  Zongwang Li ,  Kiran Gunnam

    IPC分类号： H03M13/03

    CPC分类号： H03M13/1105 ,  H03M13/2957 ,  H03M13/3961 ,  H03M13/6325 ,  H03M13/658 ,  H04L1/005 ,  H04L1/0057

    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 channel detector circuit. The channel detector circuit includes a branch metric calculator circuit that is operable to receive a number of violated checks from a preceding stage, and to scale an intrinsic branch metric using a scalar selected based at least in part on the number of violated checks to yield a scaled intrinsic branch metric.

    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，公开了一种包括信道检测器电路的数据处理系统。 信道检测器电路包括分支度量计算器电路，其可操作以从前一级接收多个违反的检查，并且使用至少部分地基于违反检查的数量选择的标量来缩放固有分支度量，以产生 缩放的内在分支度量。

    Systems and methods for hard decision assisted decoding
    99.
    发明授权
    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：US08443267B2

    公开(公告)日：2013-05-14

    申请号：US12430927

    申请日：2009-04-28

    申请人： Hao Zhong ,  Shaohua Yang ,  Weijun Tan ,  Changyou Xu ,  Yuan Xing Lee

    发明人： Hao Zhong ,  Shaohua Yang ,  Weijun Tan ,  Changyou Xu ,  Yuan Xing Lee

    IPC分类号： G06F11/00

    CPC分类号： H03M13/1111 ,  H03M13/1108 ,  H03M13/1128 ,  H03M13/3715 ,  H03M13/6331

    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。