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1. 发明授权

US08949701B2 Systems and methods for low latency media defect detection 有权
标题翻译：用于低延迟介质缺陷检测的系统和方法
公开(公告)号：US08949701B2
公开(公告)日：2015-02-03
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
CPC分类号： G11B20/10509 , G11B20/10046 , G11B20/10268 , G11B20/10472 , G11B20/1816 , G11B27/36 , G11B2220/2516 , H04L27/0002
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。

2. 发明授权

US08755257B2 Method and apparatus for detecting land pre-pits 失效
标题翻译：用于检测土地预制坑的方法和装置
公开(公告)号：US08755257B2
公开(公告)日：2014-06-17
申请号：US13439464
申请日：2012-04-04
申请人： Mats Oberg , Jingfeng Liu
发明人： Mats Oberg , Jingfeng Liu
IPC分类号： G11B7/00
CPC分类号： G11B7/0053 , G11B7/00736 , G11B7/00745 , G11B20/10037 , G11B20/10268 , G11B20/10342 , G11B20/10462 , G11B20/10509 , G11B20/1217 , G11B2020/1239 , G11B2020/1274 , G11B2020/1287 , G11B2220/2562
摘要： Aspects of the disclosure provide a method for detecting land pre-pits. The method includes detecting, based on a land pre-pit threshold, a land pre-pit data stream from a signal responsive to land pre-pits on an optical medium, comparing a characteristic of the detected land pre-pit data stream in a specific number of wobble periods with a pre-determined land pre-pit characteristic in the specific number of wobble periods, and adjusting the land pre-pit threshold based on the comparison.
摘要翻译：本公开的方面提供了一种用于检测土地预制坑的方法。该方法包括基于陆地预制坑阈值，从响应光学介质上的陆地预制坑的信号中检测陆地预制凹坑数据流，将检测到的陆地预制凹坑数据流的特性与特定的具有在特定数量的摆动周期中具有预定的预定凹坑特性的摆动周期的数量，以及基于该比较来调整土地预制坑阈值。

3. 发明申请

US20140025904A1 Systems and Methods for Gate Aware Iterative Data Processing 有权
标题翻译：门控感知系统和方法迭代数据处理
公开(公告)号：US20140025904A1
公开(公告)日：2014-01-23
申请号：US13552403
申请日：2012-07-18
申请人： Fan Zhang , Yang Han , Ming Jin , Chung-Li Wang
发明人： Fan Zhang , Yang Han , Ming Jin , Chung-Li Wang
IPC分类号： G06F12/00
CPC分类号： G11B20/10268 , G11B20/10509
摘要： The present invention is related to systems and methods for iterative data processing scheduling.
摘要翻译：本发明涉及用于迭代数据处理调度的系统和方法。

4. 发明授权

US08593913B2 Magnetic recording device, controller thereof, and magnetic recording method 有权
标题翻译：磁记录装置，其控制器和磁记录方法
公开(公告)号：US08593913B2
公开(公告)日：2013-11-26
申请号：US13284293
申请日：2011-10-28
申请人： Yuichi Yamada , Akihiko Takeo , Hiroshi Isokawa
发明人： Yuichi Yamada , Akihiko Takeo , Hiroshi Isokawa
IPC分类号： G11B11/00
CPC分类号： G11B5/02 , G11B5/455 , G11B20/10314 , G11B20/10509 , G11B20/1879 , G11B2005/001 , G11B2005/0021 , G11B2220/2516
摘要： According to one embodiment, a magnetic recording device includes: a magnetic recording medium provided with data regions for data recording; a light output module which outputs an optical signal to be applied to a recording position where recording data is recorded of the data regions; a write head which records the recoding data at the recording position magnetically; a light quantity setting module which sets a light quantity value of the optical signal output from the light output module; a heat-assisted recording controller which performs a control so that the recording data is recorded by the write head at the recording position which is heat-assisted by applying an optical signal with the set light quantity value; and a controller which adjusts the light quantity value of the optical signal set by the light quantity setting module using the recording position being a part of the data regions.
摘要翻译：根据一个实施例，磁记录装置包括：磁记录介质，设置有用于数据记录的数据区; 光输出模块，其输出要施加到记录数据的数据区域的记录位置的光信号; 写入头，其在记录位置上磁记录记录数据; 光量设定模块，其设定从所述光输出模块输出的光信号的光量值; 一种热辅助记录控制器，其执行控制，使得记录数据由写入头记录在通过施加具有设定光量值的光信号而被热辅助的记录位置处; 以及控制器，其使用作为数据区域的一部分的记录位置来调整由光量设定模块设置的光信号的光量值。

5. 发明申请

US20120265488A1 Systems and Methods for Reliability Assisted Noise Predictive Filtering 有权
标题翻译：可靠性辅助噪声预测滤波系统与方法
公开(公告)号：US20120265488A1
公开(公告)日：2012-10-18
申请号：US13088178
申请日：2011-04-15
申请人： Lingyan Sun , Hongwei Song , Jingfeng Liu
发明人： Lingyan Sun , Hongwei Song , Jingfeng Liu
IPC分类号： G06F19/00 , G11B5/09
CPC分类号： G11B20/10287 , G11B20/10009 , G11B20/10296 , G11B20/10509
摘要： Various embodiments of the present invention provide systems and methods for data processing. As an example, a data processing circuit is disclosed that includes: a data detector circuit, a calibration circuit, and an enable circuit. The data detector circuit is operable to apply a data detection algorithm to a data input to yield a detected output based at least in part on control values. The calibration circuit operable to update the control values based at least in part on the data input, the detected output, and a calibration circuit enable. The calibration circuit enable is generated by the enable circuit based at least in part on the detected output.
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。作为示例，公开了一种数据处理电路，其包括：数据检测器电路，校准电路和使能电路。数据检测器电路可操作以将数据检测算法应用于数据输入，以至少部分地基于控制值产生检测到的输出。校准电路可操作以至少部分地基于数据输入，检测到的输出和校准电路使能来更新控制值。校准电路使能由至少部分地基于所检测的输出的使能电路产生。

6. 发明授权

US08270273B2 Calibration circuit and method thereof for data recovery 失效
标题翻译：校准电路及其数据恢复方法
公开(公告)号：US08270273B2
公开(公告)日：2012-09-18
申请号：US12571455
申请日：2009-10-01
申请人： Sheng-Hung Wu
发明人： Sheng-Hung Wu
IPC分类号： G11B20/18 , G11B20/10 , G11B7/00
CPC分类号： G11B20/10009 , G11B20/10055 , G11B20/1024 , G11B20/10509 , G11B2220/2562
摘要： A calibration circuit and a calibration method thereof for data recovery are provided. The calibration circuit includes an amplitude detector, a period detector, and a compensation circuit. The amplitude detector samples amplitudes of a data signal according to a zero-crossing signal and outputs an amplitude signal accordingly. The period detector counts a clock signal according to the zero-crossing signal and outputs a period signal accordingly. The compensation circuit receives the amplitude signal, the period signal, and the data signal. The compensation circuit adjusts a phase of the data signal by calculating differences between a reference signal and the amplitude signal and between the reference signal and the period signal and outputs a calibrated data signal accordingly. Accordingly, a better recognition performance on the data signal is achieved by calibrating the data signal in real-time.
摘要翻译：提供了一种用于数据恢复的校准电路及其校准方法。校准电路包括振幅检测器，周期检测器和补偿电路。幅度检测器根据过零信号采样数据信号的幅度，并相应地输出幅度信号。周期检测器根据过零信号对时钟信号进行计数，并相应地输出周期信号。补偿电路接收幅度信号，周期信号和数据信号。补偿电路通过计算参考信号和幅度信号之间以及参考信号和周期信号之间的差异来调整数据信号的相位，并相应地输出校准数据信号。因此，通过实时校准数据信号来实现对数据信号的更好的识别性能。

7. 发明授权

US08165007B2 Information detection device and optical disc device 有权
标题翻译：信息检测装置和光盘装置
公开(公告)号：US08165007B2
公开(公告)日：2012-04-24
申请号：US12942418
申请日：2010-11-09
申请人： Hiromi Honma
发明人： Hiromi Honma
IPC分类号： G11B20/10
CPC分类号： G11B20/10009 , G11B20/10111 , G11B20/1012 , G11B20/10148 , G11B20/10166 , G11B20/10277 , G11B20/10296 , G11B20/10361 , G11B20/1037 , G11B20/10481 , G11B20/10509 , G11B2220/2541 , G11B2220/2562
摘要： An information detection device includes an equalizer that equalizes the readout signal to a PR channel having equalization target levels of four or more values, and a Viterbi detector. The Viterbi detector generates branch metrics with the equalization target levels as reference levels to determine recording data from an output of the equalizer. The Viterbi detector has a mode of generating the branch metrics and determining the recording data by limiting at least one out of a maximum value and a minimum value of the equalization target levels.
摘要翻译：信息检测装置包括均衡器，其将读出信号与具有四个或更多个值的均衡目标电平的PR信道和维特比检测器相等。维特比检测器产生具有均衡目标电平作为参考电平的分支度量，以从均衡器的输出确定记录数据。维特比检测器具有通过限制均衡目标电平的最大值和最小值中的至少一个来产生分支度量并且确定记录数据的模式。

8. 发明授权

US07961415B1 Master calibration channel for a multichannel tape drive 有权
标题翻译：多通道磁带驱动器的主校准通道
公开(公告)号：US07961415B1
公开(公告)日：2011-06-14
申请号：US12695293
申请日：2010-01-28
申请人： Marc Feller
发明人： Marc Feller
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10509 , G11B2220/90
摘要： In one embodiment, an apparatus comprises two or more slave channels, wherein each one of the slave channels comprises a non-adaptive filter operable to filter an input signal to the slave channel using filter coefficients received from a master channel; and the master channel coupled to each one of the slave channels, wherein the master channel comprises an adaptive filter operable to: for each one of one or more of the slave channels, determine the filter coefficients for the slave channel using the input signal to the slave channel; and send the filter coefficients to the slave channel.
摘要翻译：在一个实施例中，装置包括两个或更多个从属通道，其中每个从属通道包括非自适应滤波器，该非自适应滤波器可用于使用从主信道接收的滤波器系数对从属信道的输入信号进行滤波; 并且所述主信道耦合到每个从属信道，其中所述主信道包括自适应滤波器，所述自适应滤波器可操作用于：对于一个或多个从信道中的每一个，使用所述从信道的输入信号来确定所述从信道的滤波器系数，从通道; 并将滤波器系数发送到从属通道。

9. 发明申请

US20090002868A1 Read after write enhancement for bit patterned media 有权
标题翻译：对位图形媒体进行写入增强后读取
公开(公告)号：US20090002868A1
公开(公告)日：2009-01-01
申请号：US11824137
申请日：2007-06-29
申请人： Michael L. Mallary , John W. Vanlaanen , Ching He
发明人： Michael L. Mallary , John W. Vanlaanen , Ching He
IPC分类号： G11B5/02 , G11B5/09
CPC分类号： G11B5/59616 , B82Y10/00 , G11B5/012 , G11B5/02 , G11B5/3948 , G11B5/59638 , G11B5/746 , G11B5/82 , G11B20/10398 , G11B20/10509 , G11B20/1879 , G11B2220/252
摘要： A read/write head for use with bit-patterned media detects write synchronization errors between a write clock and the bit-patterned media. In particular, the read/write head writes data to the bit-patterned media using a write clock. The data is then read from the bit-patterned media and used to detect write synchronization errors between the write clock and the location of bit-islands on the bit-patterned media. Based on detected write synchronization errors, the phase associated with the write clock is modified to align the write clock with the location of bit-islands on the bit-patterned media.
摘要翻译：用于位图形介质的读/写头检测写入时钟和位图形介质之间的写入同步错误。特别地，读/写头使用写时钟将数据写入位图案介质。然后从位图形介质读取数据，并用于检测写时钟与位图形介质上位位置之间的写同步错误。基于检测到的写同步错误，修改与写时钟相关的相位，以使写时钟与位图形介质上的位岛的位置对齐。

10. 发明授权

US09928881B1 Dynamic write field test for a perpendicular recording head 有权
公开(公告)号：US09928881B1
公开(公告)日：2018-03-27
申请号：US15711790
申请日：2017-09-21
申请人： Seagate Technology LLC
发明人： Zhe Shen , Zuxuan Lin , Lei Lu , Jianhua Xue
IPC分类号： G11B5/09 , G11B20/10 , G11B27/36 , G11B5/455 , G11B5/012 , G11B5/00 , G11B5/55
CPC分类号： G11B27/36 , G11B5/012 , G11B5/455 , G11B5/4555 , G11B5/5552 , G11B20/10009 , G11B20/10481 , G11B20/10509 , G11B2005/0013
摘要： A method of testing a dynamic write field of a recording head includes preparing a test magnetic medium and recording a write signal on the test magnetic medium with the write signal being set at a first write parameter and a second write parameter. An average of multiple read-back signals of the recorded write signal are captured to determine an average amplitude of the read-back signals. The recording of the write signal on the test magnetic medium and the capturing of the average of multiple read-back signals of the recorded write signal are repeated to determine the average amplitude of the read-back signals by fixing the first write parameter of the write signal and changing the second write parameter of the write signal until the average amplitude of the read-back signals saturates.

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