Defect detector for holographic storage systems
    31.
    发明授权
    Defect detector for holographic storage systems 有权
    全息存储系统缺陷探测器

    公开(公告)号:US08301976B1

    公开(公告)日:2012-10-30

    申请号:US11954823

    申请日:2007-12-12

    IPC分类号: G06F11/00

    摘要: A system including a data detection module, a reconstruction filter module, a first correlation module, and a second correlation module, The data detection module detects data bits from input signals. The reconstruction filter module generates reconstructed signals using the data bits. The first correlation module correlates the input signals and the reconstructed signals and generates first correlation values. The second correlation module self-correlates the reconstructed signals and generates second correlation values. In response to at least one of the input signals and the reconstructed signals including a B-bit floating number having a sign bit, at least one of the first correlation module and the second correlation module generates the first correlation values and the second correlation values based on the sign bit and K most significant bits (MSBs) of the B-bit floating number, where 0

    摘要翻译: 一种包括数据检测模块,重构滤波器模块,第一相关模块和第二相关模块的系统。数据检测模块从输入信号检测数据位。 重构滤波器模块使用数据位产生重构信号。 第一相关模块将输入信号和重构信号相关并产生第一相关值。 第二相关模块将重构信号自相关并产生第二相关值。 响应于包括具有符号位的B位浮动数的输入信号和重构信号中的至少一个,第一相关模块和第二相关模块中的至少一个产生第一相关值和第二相关值 在B位浮点数的符号位和K个最高有效位(MSB)上,其中0

    Method for detecting short burst errors in LDPC system
    32.
    发明授权
    Method for detecting short burst errors in LDPC system 有权
    用于检测LDPC系统中短脉冲串错误的方法

    公开(公告)号:US08341495B2

    公开(公告)日:2012-12-25

    申请号:US13469746

    申请日:2012-05-11

    IPC分类号: H03M13/00 H03M13/03

    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 gate is operable for receiving the first signal via 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。 该器件包括逻辑门,其中逻辑门可操作用于经由第一信号输入接收第一信号,经由第二信号输入接收第二信号,并且基于接收到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。

    Using short burst error detector in a queue-based system
    33.
    发明授权
    Using short burst error detector in a queue-based system 有权
    在基于队列的系统中使用短脉冲串错误检测器

    公开(公告)号:US08176399B2

    公开(公告)日:2012-05-08

    申请号:US12380237

    申请日:2009-02-25

    IPC分类号: H03M13/03

    摘要: A system, method, and device for detecting short burst errors in a queue-based system is disclosed. A first detector performs a data detection on a first input data set at a first time and on a second input data set at a second time. A second detector performs a data re-detection on input data sets. A decoder decodes derivations of the outputs of the first and second detector. A short burst error detector may perform a short burst error detection on decoded data and erase any detected errors. An output data buffer stores and orders the decoded data for output.

    摘要翻译: 公开了一种用于检测基于队列的系统中的短脉冲串错误的系统,方法和装置。 第一检测器在第一时间对第一输入数据集合和第二输入数据集进行数据检测。 第二检测器对输入数据集执行数据重新检测。 解码器解码第一和第二检测器的输出的导数。 短脉冲串错误检测器可对解码数据执行短脉冲串错误检测,并擦除任何检测到的错误。 输出数据缓冲器存储并排序解码数据进行输出。

    Systems and methods for media defect detection utilizing correlated DFIR and LLR data
    34.
    发明授权
    Systems and methods for media defect detection utilizing correlated DFIR and LLR data 有权
    使用相关的DFIR和LLR数据进行媒体缺陷检测的系统和方法

    公开(公告)号:US07849385B2

    公开(公告)日:2010-12-07

    申请号:US12111255

    申请日:2008-04-29

    IPC分类号: H03M13/00

    CPC分类号: G11B20/1816

    摘要: The present invention provides systems and methods for detecting a media defect. A circuit providing a hard output and a soft output is used with the hard output and the soft output being combined and the product compared with a threshold. Based at least in part on the comparison, a media defect may be identified.

    摘要翻译: 本发明提供了用于检测介质缺陷的系统和方法。 提供硬输出和软输出的电路与硬输出和软输出组合使用,并将产品与阈值进行比较。 至少部分地基于比较,可以识别媒体缺陷。

    Systems and Methods for Media Defect Detection Utilizing Correlated DFIR and LLR Data
    35.
    发明申请
    Systems and Methods for Media Defect Detection Utilizing Correlated DFIR and LLR Data 有权
    使用相关DFIR和LLR数据的介质缺陷检测系统和方法

    公开(公告)号:US20090271670A1

    公开(公告)日:2009-10-29

    申请号:US12111255

    申请日:2008-04-29

    IPC分类号: G11C29/08 G06F11/263

    CPC分类号: G11B20/1816

    摘要: Various embodiments of the present invention provide systems and methods for media defect detection. For example, a method for detecting a media defect is disclosed. The method includes deriving a data input from a medium and performing a MAP detection on the data input. The MAP detection provides an NRZ output and an LLR output corresponding to the data input. A product of the NRZ output is correlated with a product of the LLR output to produce a correlated output. The correlated output is compared with a threshold value, and a media defect output is asserted based at least in part on the result of the comparison of the correlated output with the 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,公开了一种用于检测介质缺陷的方法。 该方法包括从介质导出数据输入并对数据输入执行MAP检测。 MAP检测提供与数据输入相对应的NRZ输出和LLR输出。 NRZ输出的乘积与LLR输出的乘积相关,以产生相关输出。 将相关输出与阈值进行比较,并且至少部分地基于相关输出与阈值的比较的结果来确定介质缺陷输出。

    Systems and methods for enhanced media defect detection
    36.
    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:US08219892B2

    公开(公告)日:2012-07-10

    申请号:US12399713

    申请日:2009-03-06

    IPC分类号: G06F11/00

    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。

    Method for detecting short burst errors in LDPC system
    37.
    发明授权
    Method for detecting short burst errors in LDPC system 有权
    用于检测LDPC系统中短脉冲串错误的方法

    公开(公告)号:US08201051B2

    公开(公告)日:2012-06-12

    申请号:US12287959

    申请日:2008-10-15

    IPC分类号: H03M13/00

    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 gate 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,并根据接收到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。

    Systems and Methods for Determining Noise Components in a Signal Set
    38.
    发明申请
    Systems and Methods for Determining Noise Components in a Signal Set 有权
    用于确定信号组噪声分量的系统和方法

    公开(公告)号:US20110164669A1

    公开(公告)日:2011-07-07

    申请号:US12652201

    申请日:2010-01-05

    IPC分类号: H04B17/00

    CPC分类号: G11B20/10046 H04B17/345

    摘要: Various embodiments of the present invention provide systems and methods for estimating noise components in a received signal set. For example, one embodiment of the present invention provides a noise estimation circuit that includes a data detector circuit and a noise component calculation circuit. The data detector circuit receives a series of data samples and provides a detected output, and the noise component calculation circuit provides an electronics noise power output and a media noise power output each calculated based at least in part on the detected output and the series of data samples.

    摘要翻译: 本发明的各种实施例提供了用于估计接收信号组中的噪声分量的系统和方法。 例如,本发明的一个实施例提供了一种包括数据检测器电路和噪声分量计算电路的噪声估计电路。 数据检测器电路接收一系列数据样本并提供检测的输出,并且噪声分量计算电路提供电子噪声功率输出和媒体噪声功率输出,每个至少部分地基于所检测的输出和数据系列计算 样品。

    Methods and Apparatus for Selective Data Retention Decoding in a Hard Disk Drive
    39.
    发明申请
    Methods and Apparatus for Selective Data Retention Decoding in a Hard Disk Drive 有权
    用于硬盘驱动器中选择性数据保留解码的方法和装置

    公开(公告)号:US20100083075A1

    公开(公告)日:2010-04-01

    申请号:US12241919

    申请日:2008-09-30

    IPC分类号: H03M13/05 G06F11/14

    摘要: Methods and apparatus are provided for improved physical re-read operations in a hard disk drive. The disclosed methods and apparatus selectively retain data in a hard disk drive. A signal is read in an iterative read channel by assigning a reliability metric to each of a plurality of segments in a read signal; repeating the assigning step for a plurality of read operations; and selectively retaining the segments based on the assigned reliability metric. The read signal can be obtained by positioning a transducer over a storage media. The reliability metric may be based on soft bit decisions; log likelihood ratios or a noise estimation of a given segment.

    摘要翻译: 提供了用于改进硬盘驱动器中物理重读操作的方法和装置。 所公开的方法和设备选择性地将数据保留在硬盘驱动器中。 通过将读取信号中的多个段中的每一个分配可靠度度量,在迭代读取通道中读取信号; 重复多个读取操作的分配步骤; 并且基于所分配的可靠性度量选择性地保留段。 可以通过将传感器定位在存储介质上来获得读取信号。 可靠性度量可以基于软比特决策; 对数似然比或给定段的噪声估计。

    Using short burst error detector in a queue-based system
    40.
    发明申请
    Using short burst error detector in a queue-based system 有权
    在基于队列的系统中使用短脉冲串错误检测器

    公开(公告)号:US20090276689A1

    公开(公告)日:2009-11-05

    申请号:US12380237

    申请日:2009-02-25

    IPC分类号: G06F11/07

    摘要: A system, method, and device for detecting short burst errors in a queue-based system is disclosed. A first detector performs a data detection on a first input data set at a first time and on a second input data set at a second time. A second detector performs a data re-detection on input data sets. A decoder decodes derivations of the outputs of the first and second detector. A short burst error detector may perform a short burst error detection on decoded data and erase any detected errors. An output data buffer stores and orders the decoded data for output.

    摘要翻译: 公开了一种用于检测基于队列的系统中的短脉冲串错误的系统,方法和装置。 第一检测器在第一时间对第一输入数据集合和第二输入数据集进行数据检测。 第二检测器对输入数据集执行数据重新检测。 解码器解码第一和第二检测器的输出的导数。 短脉冲串错误检测器可对解码数据执行短脉冲串错误检测,并擦除任何检测到的错误。 输出数据缓冲器存储并排序解码数据进行输出。