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    COMPOSITE DATA RECOVERY PROCEDURE
    1.
    发明公开
    COMPOSITE DATA RECOVERY PROCEDURE 审中-公开

    公开(公告)号：US20230178109A1

    公开(公告)日：2023-06-08

    申请号：US17542875

    申请日：2021-12-06

    申请人： Seagate Technology LLC

    发明人： Ara Patapoutian ,  Jason Charles Jury

    IPC分类号： G11B20/18

    CPC分类号： G11B20/1876 ,  G11B20/1803

    摘要： A method of recovering data from one or more failed data sectors includes estimating a reader offset position from a first or a second read attempt of the one or more failed data sectors at a current set of channel parameters and basing the estimated reader offset position on, at least in part, a position error signal generated during the first or second read attempt. At least one read is performed on the one or more failed data sectors at the estimated reader offset position to obtain one or more samples. The one or more samples are processed to obtain a processed sample. Iterative outer code recovery is performed on the processed sample.

    Averaging signals to improve signal interpretation
    2.
    发明授权
    Averaging signals to improve signal interpretation 有权
    平均信号以改善信号解读

    公开(公告)号：US08359527B1

    公开(公告)日：2013-01-22

    申请号：US13445712

    申请日：2012-04-12

    申请人： Hongxin Song ,  Zining Wu

    发明人： Hongxin Song ,  Zining Wu

    IPC分类号： H03M13/03

    CPC分类号： H03M13/3738 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10175 ,  G11B20/10277 ,  G11B20/10305 ,  G11B20/1037 ,  G11B20/10527 ,  G11B20/18 ,  G11B20/1816 ,  G11B20/1876 ,  G11B20/24 ,  G11B2020/10694 ,  G11B2020/183 ,  G11B2220/2516 ,  H03M5/145 ,  H03M13/3784 ,  H03M13/4138

    摘要： Systems and techniques to interpret signals on a noisy channel. A described system includes a filter, buffer, detector, controller, and averager. The buffer can store a group of signals, including a filtered digital signal and previous signal(s). The controller can determine whether first discrete values are adequately indicated and initiate a retry mode when the first discrete values are not adequately indicated. The averager can produce a new signal, in the retry mode, based on an average of at least a portion of the group of signals. The detector can interpret the new signal as second discrete values. The controller can determine whether the second discrete values are adequately indicated based on a measurement of differences between hard decisions indicated by the new signal and hard decisions indicated by the filtered digital signal. The controller can selectively exclude a signal of the group of signals from the average.

    摘要翻译： 在嘈杂频道上解码信号的系统和技术。 所描述的系统包括滤波器，缓冲器，检测器，控制器和平均器。 缓冲器可以存储一组信号，包括经滤波的数字信号和先前的信号。 控制器可以确定第一离散值是否被充分地指示，并且当第一个离散值没有充分地指示时，控制器可以启动重试模式。 平均器可以在重试模式下基于该组信号的至少一部分的平均值产生新的信号。 检测器可以将新信号解释为第二离散值。 控制器可以基于由新信号指示的硬判决与经滤波的数字信号指示的硬判决之间的差异的测量来确定第二离散值是否被充分地指示。 控制器可以从平均值中选择性地排除信号组的信号。

    Averaging signals to improve signal interpretation
    3.
    发明授权
    Averaging signals to improve signal interpretation 有权
    平均信号以改善信号解读

    公开(公告)号：US08161361B1

    公开(公告)日：2012-04-17

    申请号：US10600419

    申请日：2003-06-20

    申请人： Hongxin Song ,  Zining Wu

    发明人： Hongxin Song ,  Zining Wu

    IPC分类号： H03M13/03

    CPC分类号： H03M13/3738 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10175 ,  G11B20/10277 ,  G11B20/10305 ,  G11B20/1037 ,  G11B20/10527 ,  G11B20/18 ,  G11B20/1816 ,  G11B20/1876 ,  G11B20/24 ,  G11B2020/10694 ,  G11B2020/183 ,  G11B2220/2516 ,  H03M5/145 ,  H03M13/3784 ,  H03M13/4138

    摘要： Systems and techniques to interpret signals on a noisy channel. In general, in one implementation, the technique includes: interpreting an input signal as discrete values, and in response to an inadequate signal, averaging multiple signals to improve interpretation of the input signal. The input signal can be a read signal from a storage medium, such as those found in disk drives. A read channel can include a buffer and an averaging circuit capable of different signal averaging approaches in a retry mode, including making signal averaging decisions based on a signal quality measure. Buffering read signals can be done in alternative locations in the read channel and can involve buffering of many prior read signals and/or buffering of an averaged read signal.

    摘要翻译： 在嘈杂频道上解码信号的系统和技术。 通常，在一个实现中，该技术包括：将输入信号解释为离散值，并且响应于不足的信号，对多个信号进行平均以改善输入信号的解释。 输入信号可以是来自存储介质的读取信号，例如在磁盘驱动器中发现的信号。 读通道可以包括缓冲器和能够在重试模式下具有不同信号平均方法的平均电路，包括基于信号质量测量进行信号平均判定。 缓冲读取信号可以在读通道中的替代位置进行，并且可以涉及缓冲许多先前的读取信号和/或缓冲平均的读取信号。

    RETRY AND RE-READ FOR WRITE SYNCHRONIZATION
    4.
    发明申请
    RETRY AND RE-READ FOR WRITE SYNCHRONIZATION 有权
    重写和重新读取以进行写同步

    公开(公告)号：US20090009901A1

    公开(公告)日：2009-01-08

    申请号：US11773213

    申请日：2007-07-03

    申请人： Jason Seth Goldberg ,  Mehmet Fatih Erden

    发明人： Jason Seth Goldberg ,  Mehmet Fatih Erden

    IPC分类号： G11B5/09

    CPC分类号： G11B20/12 ,  G11B5/09 ,  G11B5/746 ,  G11B20/1833 ,  G11B20/1876 ,  G11B2220/252

    摘要： A method of detecting a cycle slip in a data string read from a bit patterned media and adjusting the data string to compensate for the cycle slip is disclosed. A system including a writeable data storage medium and a compensator configured to adjust data read from the data storage medium to compensate for a cycle slip during the writing of the data onto the storage medium is also disclosed.

    摘要翻译： 公开了一种检测从位图形介质读取的数据串中的周期滑移并调整数据串以补偿周期滑移的方法。 还公开了一种包括可写数据存储介质和补偿器的系统，其被配置为在将数据写入存储介质期间调整从数据存储介质读取的数据以补偿周期滑移。

    Read channel operable to calibrate a coefficient of a filter, such as an FIR filter, disposed before an interpolated-timing-recovery circuit, and related integrated circuit, system, and method
    5.
    发明申请
    Read channel operable to calibrate a coefficient of a filter, such as an FIR filter, disposed before an interpolated-timing-recovery circuit, and related integrated circuit, system, and method 有权
    用于校准布置在内插定时恢复电路之前的诸如FIR滤波器的滤波器的系数的读取通道，以及相关的集成电路，系统和方法

    公开(公告)号：US20070250556A1

    公开(公告)日：2007-10-25

    申请号：US11711479

    申请日：2007-02-26

    申请人： Hakan Ozdemir ,  Jonathan Ashley

    发明人： Hakan Ozdemir ,  Jonathan Ashley

    IPC分类号： G06F17/17

    CPC分类号： G11B20/10009 ,  G11B20/10027 ,  G11B20/10046 ,  G11B20/10222 ,  G11B20/10296 ,  G11B20/10481 ,  G11B20/1876

    摘要： An embodiment of a read channel includes a filter, an interpolator, a recovery circuit, an error detector, a reverse interpolator, and a filter calibrator. The filter is operable to receive a raw sample of a signal and a coefficient-correction value, generate a filtered sample from the raw sample and a pre-established coefficient, and change the coefficient in response to the coefficient-correction value. The interpolator is operable to interpolate the filtered sample, and the recovery circuit is operable to generate a data symbol from the interpolated sample. The error detector is operable to generate an ideal sample from the data symbol and to generate a difference between the ideal sample and the interpolated sample, and the reverse interpolator is operable to reverse interpolate the difference. The filter calibrator is operable to receive the raw sample and to generate the coefficient-correction value from the raw sample and the reverse-interpolated difference.

    摘要翻译： 读通道的实施例包括滤波器，内插器，恢复电路，误差检测器，反向内插器和滤波器校准器。 滤波器可操作以接收信号的原始样本和系数校正值，从原始样本生成滤波后的样本和预先建立的系数，并响应于系数校正值改变系数。 内插器可操作地内插经滤波的样本，并且恢复电路可操作以从内插样本生成数据符号。 误差检测器可操作以从数据符号产生理想的采样，并产生理想采样与内插采样之间的差值，并且反向内插器可操作以反向内插差值。 过滤器校准器可操作以接收原始样品并从原始样品和反向插值差产生系数校正值。

    Compressing method and apparatus, expanding method and apparatus, compression and expansion system, recorded medium, program
    10.
    发明申请
    Compressing method and apparatus, expanding method and apparatus, compression and expansion system, recorded medium, program 审中-公开
    压缩方法和装置，扩展方法和装置，压缩和扩展系统，记录介质，程序

    公开(公告)号：US20050143981A1

    公开(公告)日：2005-06-30

    申请号：US10048549

    申请日：2001-05-22

    申请人： Yukio Koyanagi

    发明人： Yukio Koyanagi

    IPC分类号： H03M7/30 ,  H03M13/00 ,  G10L19/14

    CPC分类号： H03M13/6312 ,  G11B20/1876 ,  H03M7/30 ,  H03M13/00

    摘要： Data to be compressed is sampled at a time interval of a sampled point where an error is at a desired value or smaller between a data value on a straight line for connecting two pieces of sampled data and a sampled data value corresponding to the data value, and a pair of discrete amplitude data D1, D6, . . . , on each sample point and timing data indicative of a time interval between sample points is obtained as compressed data. Hence, from a large number of pieces of sampled data D1, D2, . . . , included in data to be compressed, only a pair of amplitude data and timing data can be obtained as compressed data on a sample point where an error from original data is not large even when linear interpolation is performed during expansion. Thus, it is possible to remarkably improve the quality of reproduced data while achieving high compressibility.

    摘要翻译： 将要压缩的数据以连续两个采样数据的直线上的数据值与对应于数据值的采样数据值之间的误差处于期望值或更小的采样点的时间间隔进行采样， 和一对离散振幅数据D 1，D 6，...。 。 。 在每个采样点和指示采样点之间的时间间隔的定时数据被获得作为压缩数据。 因此，从大量的采样数据D 1，D 2，... 。 。 包含在要压缩的数据中，即使在扩展期间进行线性插值的情况下，也可以仅从原始数据的误差不大的采样点获得作为压缩数据的一对振幅数据和定时数据。 因此，可以显着提高再现数据的质量，同时实现高压缩性。