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1. 发明专利

JP2011076697A Automatic filter-reset mechanism 有权
标题翻译：自动过滤机构
公开(公告)号：JP2011076697A
公开(公告)日：2011-04-14
申请号：JP2010145789
申请日：2010-06-28
申请人： Lsi Corp , エルエスアイコーポレーション
发明人： LI JINGFENG , ZHANG HAOTIAN , SONG HONGWEI , SUN LINGYAN
IPC分类号： G11B20/10
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10481 , H03H17/0294
摘要： PROBLEM TO BE SOLVED: To provide a mechanism for automatically resetting an equalization filter such as a digital finite impulse response (DFIR) filter in a read channel of a hard drive, during read operations within a sector of the hard drive.
SOLUTION: A (hard-drive) read channel has a (DFIR equalization) filter, whose tap coefficients are adaptively updated. A reset controller monitors an (LLR) signal generated downstream of the filter to automatically determine when to reset the filter, e.g., by reloading an initial set of user-specified tap coefficients. For LLR values, the reset controller determines to reset the filter when the reset controller detects that too many recent LLR values have confidence values that are too low. When implemented in a hard-drive read channel, the reset controller can reset the filter one or more times during read operations within a sector of the hard drive.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于在硬盘驱动器的扇区内的读取操作期间自动复位硬盘驱动器的读通道中的数字有限脉冲响应（DFIR）滤波器的均衡滤波器的机制。解决方案：（硬盘驱动器）读通道具有（DFIR均衡）滤波器，其抽头系数被自适应地更新。复位控制器监视在滤波器下游产生的（LLR）信号，以自动确定何时复位滤波器，例如通过重新加载用户指定的抽头系数的初始集合。对于LLR值，当复位控制器检测到过多的近期LLR值具有太低的置信度值时，复位控制器确定复位滤波器。当在硬盘驱动器读取通道中实现时，复位控制器可以在硬盘驱动器的扇区内的读取操作期间复位一次或多次过滤器。版权所有（C）2011，JPO＆INPIT

2. 发明专利

JP2014063563A Methods and apparatus for selective data retention decoding in hard disk drive 审中-公开
标题翻译：硬盘驱动器中选择性数据保持解码的方法和设备
公开(公告)号：JP2014063563A
公开(公告)日：2014-04-10
申请号：JP2013266930
申请日：2013-12-25
申请人： Lsi Corp , エルエスアイコーポレーション
发明人： LIU JINGFENG , YAN SHAOHUA , SONG HONGWEI , LEE YUAN XING
IPC分类号： G11B20/18 , H03M13/19
CPC分类号： G11B20/18 , G11B2020/183 , G11B2220/2516 , H03M13/1105 , H03M13/2948 , H03M13/2957 , H03M13/6343
摘要： PROBLEM TO BE SOLVED: To provide methods and apparatus for improved physical re-read operations in a hard disk drive.SOLUTION: 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 on the basis of the assigned reliability metric. The read signal can be obtained by positioning a transducer over a storage medium. 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：要解决的问题：提供用于改进硬盘驱动器中的物理重读操作的方法和装置。解决方案：所公开的方法和装置选择性地将数据保留在硬盘驱动器中。通过以下方式在迭代读通道中读取信号：将可靠性度量分配给读信号中的多个段中的每一个; 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所述段。读取信号可通过将换能器定位在存储介质上而获得。可靠性度量可以基于软比特决定，对数似然比或给定分段的噪声估计。

3. 发明专利

JP2011097559A Phase detector for timing recovery loop 有权
标题翻译：用于定时恢复环路的相位检测器
公开(公告)号：JP2011097559A
公开(公告)日：2011-05-12
申请号：JP2010130632
申请日：2010-06-08
申请人： Lsi Corp , エルエスアイコーポレーション
发明人： LI JINGFENG , SONG HONGWEI
IPC分类号： H04L7/033
CPC分类号： G11B20/10009 , G11B20/10037 , G11B20/10055 , G11B20/10222 , G11B20/10296 , G11B2220/2516 , H03L7/07 , H03L7/0807 , H03L7/0812 , H03L7/091 , H03M1/1255 , H04L7/0054
摘要： PROBLEM TO BE SOLVED: To provide a phase detector for a timing recovery loop. SOLUTION: A (hard-drive) read channel has a phase detector used in a timing recovery loop. The phase detector utilizes a sign bit and a confidence value from a received log-likelihood ratio (LLR) signal to generate a mean value. The mean value is convolved with a partial response target value to generate an estimated timing error signal. When implemented in a hard-drive read channel, the phase detector makes timing recovery with lower loss-of-lock rates possible. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供用于定时恢复回路的相位检测器。解决方案：（硬盘驱动器）读通道在定时恢复循环中使用相位检测器。相位检测器利用来自接收到的对数似然比（LLR）信号的符号位和置信度值来产生平均值。平均值与部分响应目标值进行卷积以产生估计的定时误差信号。当在硬盘驱动器读取通道中实现时，相位检测器可以实现更低的锁定失调率的定时恢复。版权所有（C）2011，JPO＆INPIT

4. 发明申请

WO2010039161A3 METHODS AND APPARATUS FOR SELECTIVELY RETAINING READ SIGNAL SEGMENTS BASED ON ASSIGNED RELIABILITY METRICS IN A HARD DISK DRIVE 审中-公开
标题翻译：基于硬盘驱动器中分配的可靠性度量的选择性保留读取信号段的方法和装置
公开(公告)号：WO2010039161A3
公开(公告)日：2010-09-16
申请号：PCT/US2008088224
申请日：2008-12-23
申请人： LSI CORP , LIU JINGFENG , YANG SHAOHUA , SONG HONGWEI , LEE YUAN XING
发明人： LIU JINGFENG , YANG SHAOHUA , SONG HONGWEI , LEE YUAN XING
IPC分类号： G11B20/18 , H03M13/11 , H03M13/29
CPC分类号： G11B20/18 , G11B2020/183 , G11B2220/2516 , H03M13/1105 , H03M13/2948 , H03M13/2957 , H03M13/6343
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的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，通过向读取信号中的多个段中的每一个分配可靠性度量，在迭代读取通道中读取A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。读取信号可以通过将传感器定位在存储介质上来获得。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。

5. 发明公开

EP2198427A4 SYSTEMS AND METHODS FOR ADAPTIVE EQUALIZATION IN RECORDING CHANNELS 审中-公开
标题翻译：系统和方法自适应均衡IN录音通道
公开(公告)号：EP2198427A4
公开(公告)日：2013-11-06
申请号：EP08863839
申请日：2008-10-27
申请人： LSI CORP
发明人： MATHEW GEORGE , LEE YUAN XING , SONG HONGWEI , JINGFENG LIU , PARK JONGSEUNG
IPC分类号： G11B21/02 , G11B5/09 , G11B19/04 , G11B20/10
CPC分类号： G11B19/041 , G11B5/09 , G11B20/10009 , G11B20/10046 , G11B20/10481 , G11B2220/2516

6. 发明公开

EP2227808A4 SYSTEMS AND METHODS FOR FLY-HEIGHT CONTROL USING SERVO DATA 审中-公开
标题翻译：系统和飞行系统级的方法，使用功率数据
公开(公告)号：EP2227808A4
公开(公告)日：2013-12-18
申请号：EP08861253
申请日：2008-10-27
申请人： LSI CORP
发明人： MATHEW GEORGE , LEE YUAN XING , SONG HONGWEI , GRUNDVIG JEFFREY P , ANNAMPEDU VISWANATH
IPC分类号： G11B21/02 , G11B5/596 , G11B5/60 , G11B21/10 , G11B21/21
CPC分类号： G11B5/6029 , G11B5/59688
摘要： Various embodiments of the present invention provide systems and methods for determining changes in fly-height. For example, various embodiments of the present invention provide storage devices that include a storage medium having servo data thereon. A read/write head assembly is disposed in relation to the storage medium. A servo based fly-height adjustment circuit receives the servo data via the read/write head assembly, and calculates a first harmonics ratio based on the received data and compares the first harmonics ratio with a second harmonics ratio to determine an error in the distance between the read/write head assembly and the storage medium.

7. 发明公开

EP2347416A4 SYSTEMS AND METHODS FOR NOISE REDUCED DATA DETECTION 审中-公开
标题翻译：系统和方法噪声降低的数据检测
公开(公告)号：EP2347416A4
公开(公告)日：2012-05-30
申请号：EP09827908
申请日：2009-04-17
申请人： LSI CORP
发明人： YANG SHAOHUA , LEE YUAN XING , RAUSCHMAYER RICHARD , SONG HONGWEI , LIU JINGFENG , TAN WEIJUN
IPC分类号： G11B20/18 , G11B20/10 , G11B20/24 , H04L1/00 , H04L1/16
CPC分类号： G11B20/24 , G11B20/10037 , G11B20/10194 , G11B20/10527 , G11B20/1833 , G11B20/1879 , G11B2020/1062 , G11B2020/10685 , G11B2020/10694 , G11B2020/10759 , G11B2020/183 , G11B2020/185 , G11B2220/2516 , H03M13/1105 , H03M13/2948 , H03M13/3746 , H03M13/6343 , H04L1/005 , H04L1/0057

8. 发明公开

EP2179417A4 SYSTEMS AND METHODS FOR FLY-HEIGHT CONTROL USING SERVO ADDRESS MARK DATA 审中-公开
标题翻译：系统和控制器海拔高度的方法，使用伺服地址标记数据
公开(公告)号：EP2179417A4
公开(公告)日：2013-12-18
申请号：EP08863082
申请日：2008-10-27
申请人： LSI CORP
发明人： MATHEW GEORGE , LEE YUAN XING , SONG HONGWEI , GRUNDVIG JEFFREY P , ANNAMPEDU VISWANATH
IPC分类号： G11B21/02 , G11B5/596 , G11B5/60 , G11B21/10 , G11B21/21
CPC分类号： G11B5/59688 , G11B5/6029
摘要： Various embodiments of the present invention provide systems and methods for determining fly-height adjustments. For example, various embodiments of the present invention provide storage devices that include a storage medium, a read/write head assembly disposed in relation to the storage medium (278), and a SAM based fly-height adjustment circuit (214). The storage medium (278) includes a plurality of servo data regions (110) that each include a servo address mark (154). The SAM based fly-height adjustment circuit (214) receives the servo address mark (154) from the plurality of servo data regions (110) via the read/write head assembly (276), and calculates a first harmonics ratio (445) based on the received data. The first harmonics ratio (445) is compared with a second harmonics ratio (450) to determine an error (365) in the distance (295) between the read/write head assembly (276) and the storage medium (278).

9. 发明公开

EP2377124A4 SYSTEMS AND METHODS FOR ADAPTIVE TARGET SEARCH 有权转让
标题翻译：系统和方法自适应目标搜索
公开(公告)号：EP2377124A4
公开(公告)日：2013-11-20
申请号：EP09837740
申请日：2009-01-09
申请人： LSI CORP
发明人： LIU JINGFENG , SONG HONGWEI
IPC分类号： G11B5/02 , G11B5/035 , G11B5/09 , G11B20/10 , G11B21/02
CPC分类号： G11B20/10009 , G11B5/035 , G11B5/09 , G11B20/10046 , G11B20/10212 , G11B20/10481 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for data processing. For example, some embodiments of the present invention provide data processing circuits that include both a main data processing circuit and an adaptive setting determination circuit. The main data processing circuit receives a series of data samples and includes: an equalizer circuit and a data detector circuit. The equalizer circuit receives the series of data samples and provides an equalized output. The equalizer circuit is controlled at least in part by a coefficient. The data detector circuit receives the equalizer output and provides a main data output based at least in part on a target. The adaptive setting determination circuit receives the series of data samples and the main data output, and operates in parallel with the main data processing circuit to adaptively determine the coefficient and the target.

10. 发明公开

EP2387827A4 ERROR CORRECTION CAPABILITY ADJUSTMENT OF LDPC CODES FOR STORAGE DEVICE TESTING 审中-公开
标题翻译： FOR存储设备测试LDPC码的纠错能力调整
公开(公告)号：EP2387827A4
公开(公告)日：2012-11-07
申请号：EP09838525
申请日：2009-03-13
申请人： LSI CORP
发明人： RAUSCHMAYER RICHARD , SONG HONGWEI
IPC分类号： H03M13/00 , G06F11/00 , G11B19/04 , G11B20/18
CPC分类号： G11B20/1803 , G11B20/1816 , G11C29/028 , G11C29/42 , G11C2029/0411 , H03M13/1102

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