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21.发明申请METHOD FOR AN EQUALIZER COMPUTATION IN A MEDIA SYSTEM USING A DATA SET SEPARATOR SEQUENCE 有权使用数据集分离器序列在媒体系统中均衡器计算的方法公开(公告)号：US20110200090A1
公开(公告)日：2011-08-18
申请号：US13096811
申请日：2011-04-28
IPC分类号： H03K5/159
CPC分类号： G11B5/09 , G11B20/10009 , G11B20/10046 , G11B20/10481 , G11B2005/0013 , G11B2220/90
摘要： An equalizer coefficients generator receives a DSS sequence and a DSS readback sequence, which is a function of a channel processing of the DSS sequence by a read channel. The generator generates a coefficient cyclic equalizer vector as a function of the DSS sequence and the DSS readback sequence. The generator further generates an error signal as a function of a comparison of the DSS sequence and an equalization of the DSS readback sequence based on the coefficient cyclic equalizer vector. An unacceptable error signal indicates a need to adjust the coefficient cyclic equalizer vector to yield an acceptable comparison of the DSS sequence and an equalization of the DSS readback sequence based on the coefficient cyclic equalizer vector.
摘要翻译： 均衡器系数发生器接收DSS序列和DSS回读序列，DSS序列是通过读通道的DSS序列的信道处理的函数。 发生器产生作为DSS序列和DSS回读序列的函数的系数循环均衡器向量。 发生器还根据系数循环均衡器矢量，作为DSS序列与DSS回读序列的均衡的比较的函数产生误差信号。 不可接受的误差信号指示需要调整系数循环均衡器向量以产生DSS序列的可接受比较和基于系数循环均衡器向量的DSS回读序列的均衡。
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22.发明授权Method for an equalizer computation in a media system using a data set separator sequence 有权在使用数据集分隔符序列的媒体系统中进行均衡器计算的方法公开(公告)号：US07982997B2
公开(公告)日：2011-07-19
申请号：US12251373
申请日：2008-10-14
IPC分类号： G11B5/035
CPC分类号： G11B5/09 , G11B20/10009 , G11B20/10046 , G11B20/10481 , G11B2005/0013 , G11B2220/90
摘要： Provided is a method for receiving a DSS sequence and a DSS readback sequence, which is a function of a channel processing of the DSS sequence by a read channel. A coefficient cyclic equalizer vector is generated as a function of the DSS sequence and the DSS readback sequence. An error signal is generated as a function of a comparison of the DSS sequence and an equalization of the DSS readback sequence based on the coefficient cyclic equalizer vector. An unacceptable error signal indicates a need to adjust the coefficient cyclic equalizer vector to yield an acceptable comparison of the DSS sequence and an equalization of the DSS readback sequence based on the coefficient cyclic equalizer vector.
摘要翻译： 提供了一种用于接收DSS序列和DSS回读序列的方法，DSS序列是通过读取信道对DSS序列的信道处理的函数。 作为DSS序列和DSS回读序列的函数产生系数循环均衡器向量。 根据系数循环均衡器向量，作为DSS序列与DSS回读序列的均衡的比较的函数产生误差信号。 不可接受的误差信号指示需要调整系数循环均衡器向量以产生DSS序列的可接受比较和基于系数循环均衡器向量的DSS回读序列的均衡。
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公开(公告)号：US20100232047A1
公开(公告)日：2010-09-16
申请号：US12720711
申请日：2010-03-10
CPC分类号： G11B20/1202 , G11B20/1833 , G11B20/1866 , G11B2020/1836 , G11B2020/1853 , G11B2220/93
摘要： Methods and apparatus for interleaving data in a multitrack tape drive and for writing data on a multitrack tape in the tape drive. One method includes: partitioning the data into m(2n+k) data blocks, where each data block has a logical array of rows and columns of data bytes; error-correction coding a row and a column of the logical array to produce an encoded block; assigning the coded row to a respective location in a logical interleave array having L rows and 2n+k columns of locations; and writing a sequence of assigned coded rows simultaneously in respective data tracks on the multitrack tape. The coded row is assigned such that the minimum Euclidean distance on the multitrack tape between the coded rows is maximized. The apparatus includes units for performing the methods and the computer program product includes a program code means for causing a computer to perform the methods.
摘要翻译： 用于在多轨磁带驱动器中交织数据并在磁带驱动器中的多轨磁带上写入数据的方法和装置。 一种方法包括：将数据划分为m（2n + k）个数据块，其中每个数据块具有数据字节的行和列的逻辑阵列; 对逻辑阵列的行和列进行纠错编码以产生编码块; 将编码行分配给具有L行和2n + k列位置的逻辑交错阵列中的相应位置; 以及在多轨磁带上的相应数据轨道中同时写入分配的编码行序列。 分配编码行使得编码行之间的多轨磁带上的最小欧几里得距离最大化。 所述装置包括用于执行所述方法的单元，并且所述计算机程序产品包括用于使计算机执行所述方法的程序代码装置。
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24.发明授权Method and apparatus for implementing soft-input/soft-output iterative detectors/decoders 失效用于实现软输入/软输出迭代检测器/解码器的方法和装置公开(公告)号：US06901119B2
公开(公告)日：2005-05-31
申请号：US09792325
申请日：2001-02-22
申请人： Roy Daron Cideciyan , Jonathan Darrel Coker , Ajay Dholakia , Evangelos S. Eleftheriou , Richard Leo Galbraith , Thomas Mittelholzer , David James Stanek
发明人： Roy Daron Cideciyan , Jonathan Darrel Coker , Ajay Dholakia , Evangelos S. Eleftheriou , Richard Leo Galbraith , Thomas Mittelholzer , David James Stanek
CPC分类号： H03M13/3905 , G11B20/10046 , G11B20/10055 , G11B20/10212 , G11B20/10287 , G11B20/10296 , G11B20/18 , H03M13/1102 , H03M13/2957 , H03M13/3961 , H03M13/4107 , H03M13/45 , H03M13/6331 , H03M13/6343 , H03M13/6502
摘要： A method and apparatus are provided for implementing soft-input soft-output iterative detectors/decoders. Soft-input information is added directly to incoming channel samples. Input signals comprising the received incoming channel samples with the added soft-input information are detected using a detector trellis. Branch metric terms are transformed to shift all time varying terms with the added soft-input information and some constant terms after an add compare select (ACS) unit. The shifted time varying terms with the added soft-input information and the shifted constant terms are added directly to state metric terms. The soft-input information is added directly to incoming channel samples and the computation of branch metrics is not affected. This allows optimization of a dual-max detector and soft-input soft-output Viterbi detector architectures to minimize hardware complexity and power consumption.
摘要翻译： 提供了一种用于实现软输入软输出迭代检测器/解码器的方法和装置。 软输入信息直接添加到输入信道样本。 使用检测器网格来检测包括所接收的输入信道样本与附加的软输入信息的输入信号。 转换分支度量项，以在添加的比较选择（ACS）单元之后用所添加的软输入信息和一些常数项来移位所有时变项。 随着添加的软输入信息和移位常数项的移位的时变项直接添加到状态度量项。 软输入信息直接添加到输入信道样本，并且分支度量的计算不受影响。 这允许优化双最大检测器和软输入软输出维特比检测器架构，以最小化硬件复杂性和功耗。
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公开(公告)号：US20110246864A1
公开(公告)日：2011-10-06
申请号：US12750350
申请日：2010-03-30
IPC分类号： G06F11/07
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10379 , G11B20/10509 , G11B2220/2516
摘要： According to one embodiment, a data detection system includes a coefficient-and-variance engine for selecting which infinite impulse response (IIR) filter and prediction error variance to process and store at any time, and a maximum-likelihood sequence detector. The coefficient-and-variance engine comprises a filter bank storing a plurality of IIR filters that represent a plurality of data-dependent noise whitening or noise prediction filters; a least-mean square (LMS) engine for adapting each IIR filter to actual noise conditions: a variance hank storing a plurality of prediction error variance values; and a data-dependent prediction error variance computation unit which updates the plurality of prediction error variance values. The maximum-likelihood sequence detector includes a metric computation unit that employs the plurality of IIR filters in the filter bank and the plurality of prediction error variances in the variance bank to adaptively compute detector branch metrics. Other systems and methods are also described in other embodiments.
摘要翻译： 根据一个实施例，数据检测系统包括用于选择在任何时间处理和存储的无限脉冲响应（IIR）滤波器和预测误差方差的系数和方差引擎和最大似然序列检测器。 系数和方差引擎包括存储多个表示多个数据相关噪声白化或噪声预测滤波器的IIR滤波器的滤波器组; 用于使每个IIR滤波器适应于实际噪声条件的最小均方（LMS）引擎：存储多个预测误差方差值的方差汉克; 以及数据相关预测误差方差计算单元，其更新所述多个预测误差方差值。 最大似然序列检测器包括在滤波器组中采用多个IIR滤波器的度量计算单元，并且方差库中的多个预测误差方差自适应地计算检测器分支度量。 其他系统和方法也在其他实施例中描述。
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26.发明授权公开(公告)号：US07864467B2
公开(公告)日：2011-01-04
申请号：US12027258
申请日：2008-02-06
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10037 , G11B20/24 , G11B2220/2516
摘要： Method, apparatus and computer program product adjust gain in a read channel of a magnetic media data storage device. A digital signal sample having a data-dependent noise component is received. A gain value, stored in a location in a gain table, is selected in a data-dependent manner. The gain of the signal sample is adjusted in response to the selected gain value. A bit pattern is detected from the gain-adjusted signal sample and a data output signal is output based upon the detected bit pattern.
摘要翻译： 方法，装置和计算机程序产品调整磁介质数据存储装置的读通道中的增益。 接收具有数据相关噪声分量的数字信号采样。 以数据相关的方式选择存储在增益表中的位置的增益值。 响应于所选择的增益值来调整信号采样的增益。 从增益调整信号采样中检测位模式，并且基于检测到的位模式输出数据输出信号。
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27.发明授权公开(公告)号：US07684139B2
公开(公告)日：2010-03-23
申请号：US12166136
申请日：2008-07-01
IPC分类号： G11B5/035
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10046 , G11B20/10055
摘要： A read channel and method using that read channel are disclosed. The read channel comprises an analog to digital converter which asynchronously samples at a fixed rate an analog signal formed by reading a data track, where that data track was written to a data storage medium at a symbol rate and an interpolator interconnected with the analog to digital converter. The read channel further comprises a fractionally-spaced equalizer, where the interpolator provides an interpolated signal to the fractionally-spaced equalizer at an interpolation rate, where that interpolation rate is greater than the symbol rate. The fractionally-spaced equalizer forms a synchronous equalized signal. The read channel further comprises a gain control module interconnected with the fractionally-spaced equalizer, and a sequence detector interconnected with the gain control module.
摘要翻译： 公开了使用该读通道的读通道和方法。 读通道包括模数转换器，其以固定速率异步采样通过读取数据轨道形成的模拟信号，其中数据轨道以符号速率写入数据存储介质，并且与模数转换器互连的内插器 转换器。 读通道还包括分数间隔的均衡器，其中内插器以内插速率向分数间隔的均衡器提供内插信号，其中该内插速率大于符号率。 分数间隔均衡器形成同步均衡信号。 读通道还包括与分数间隔均衡器互连的增益控制模块，以及与增益控制模块互连的序列检测器。
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28.发明申请公开(公告)号：US20090195909A1
公开(公告)日：2009-08-06
申请号：US12027258
申请日：2008-02-06
IPC分类号： G11B21/02
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10037 , G11B20/24 , G11B2220/2516
摘要： Method, apparatus and computer program product adjust gain in a read channel of a magnetic media data storage device. A digital signal sample having a data-dependent noise component is received. A gain value, stored in a location in a gain table, is selected in a data-dependent manner. The gain of the signal sample is adjusted in response to the selected gain value. A bit pattern is detected from the gain-adjusted signal sample and a data output signal is output based upon the detected bit pattern.
摘要翻译： 方法，装置和计算机程序产品调整磁介质数据存储装置的读通道中的增益。 接收具有数据相关噪声分量的数字信号采样。 以数据相关的方式选择存储在增益表中的位置的增益值。 响应于所选择的增益值来调整信号采样的增益。 从增益调整信号采样中检测位模式，并且基于检测到的位模式输出数据输出信号。
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29.发明授权Method for a cyclic dibit response estimation in a media system using a data set separator sequence 失效在使用数据集分隔符序列的媒体系统中进行循环双位响应估计的方法公开(公告)号：US07428116B2
公开(公告)日：2008-09-23
申请号：US11122680
申请日：2005-05-05
IPC分类号： G11B5/035
CPC分类号： G11B20/10 , G11B20/10009 , G11B20/10046
摘要： A dibit response estimation generator receives a DSS sequence and a DSS readback sequence, which is a function of a channel processing of the DSS sequence by a read channel. The generator generates a cyclic dibit response vector as a function of the DSS sequence and the DSS readback sequence. The generator further generates an error signal as a function of a comparison of the DSS readback sequence and a filtering of the DSS sequence based on the cyclic dibit response vector. An unacceptable error signal indicates a need to adjust the cyclic dibit response vector to yield an acceptable comparison of the DSS readback sequence and the filtering of the DSS sequence based on the cyclic dibit response vector.
摘要翻译： 双向响应估计生成器接收DSS序列和DSS回读序列，DSS序列是通过读取通道的DSS序列的信道处理的函数。 发生器产生作为DSS序列和DSS回读序列的函数的循环双位响应向量。 发生器还根据DSS回读序列的比较和基于循环双位响应向量的DSS序列的滤波产生误差信号。 不可接受的误差信号表示需要调整循环双位响应向量，以产生DSS回读序列的可接受比较和基于循环双位响应向量的DSS序列的过滤。
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30.发明授权Data-dependent noise-predictive maximum likelihood detection (DD-NPML) for magnetic recording 有权用于磁记录的数据相关噪声预测最大似然检测（DD-NPML）公开(公告)号：US08670199B2
公开(公告)日：2014-03-11
申请号：US12753586
申请日：2010-04-02
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10074 , G11B20/10175 , G11B20/10287 , G11B2220/90
摘要： In one embodiment, a method includes applying one or more whitening filters to an input stream of digitized samples from a magnetic data channel to produce a filtered sequence, performing one or more branch metric calculations to the filtered sequence to produce a branch metric, and applying a multi-state data-dependent noise-predictive maximum likelihood (DD-NPML) detector to the branch metric to produce an output stream. In another embodiment, a multi-channel data storage system includes a head for reading data from a storage medium, logic for applying one or more whitening filters to an input stream of digitized samples from a magnetic data channel to produce a filtered sequence, logic for performing one or more branch metric calculations to the filtered sequence to produce a branch metric, and logic for applying a multi-state DD-NPML detector to the branch metric to produce an output stream. Other systems and methods are described as well.
摘要翻译： 在一个实施例中，一种方法包括将一个或多个白化滤波器应用于来自磁数据信道的数字化样本的输入流，以产生经滤波的序列，对经滤波的序列执行一个或多个分支度量计算以产生分支度量，以及应用 用于产生输出流的分支度量的多状态数据相关噪声预测最大似然（DD-NPML）检测器。 在另一个实施例中，多通道数据存储系统包括用于从存储介质读取数据的头，用于将一个或多个白化滤波器应用于来自磁数据通道的数字化采样的输入流以产生滤波序列的逻辑，用于 对经滤波的序列执行一个或多个分支度量计算以产生分支度量，以及将多状态DD-NPML检测器应用于分支度量以产生输出流的逻辑。 还描述了其他系统和方法。
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