公开(公告)号：US20130286498A1

公开(公告)日：2013-10-31

申请号：US13834648

申请日：2013-03-15

Applicant: LSI Corporation

Inventor： Erich F. Haratsch ,  Ming Jin ,  George Mathew ,  Jongseung Park ,  Kurt J. Worrell

IPC: G11B20/22

CPC classification number: G11B20/22 ,  G11B5/012 ,  G11B5/09 ,  G11B19/045 ,  G11B20/10009

Abstract: Hardware-based methods and apparatus are provided for inter-track interference mitigation in magnetic recording systems using averaged values. Inter-track interference (ITI) is mitigated in a magnetic recording system by obtaining ITI cancellation data; and providing the ITI cancellation data for ITI mitigation, wherein the ITI mitigation is performed in combination with an averaging procedure for one or more of ITI mitigation of averaged data and averaging of ITI mitigated data. The sector is optionally decoded using the ITI mitigated samples. Samples for one or more side track sectors can also be averaged. The averaged side track samples can be provided as ITI cancellation data for ITI mitigation. The averaging procedure optionally applies a scaling factor to each read value.

Abstract translation: 提供基于硬件的方法和装置，用于使用平均值的磁记录系统中的轨道间干扰减轻。 通过获取ITI取消数据，在磁记录系统中减轻了轨道间干扰（ITI）。 以及提供用于ITI缓解的ITI抵消数据，其中ITI缓解与对平均数据的ITI缓解和ITI缓解数据的平均中的一个或多个的平均过程相结合执行。 可选地使用ITI缓解样本来解码扇区。 也可以对一个或多个侧轨道扇区的采样进行平均。 可以将平均的侧轨样本作为ITI缓解的ITI取消数据提供。 平均过程可选地对每个读取值应用缩放因子。

公开(公告)号：US20130148230A1

公开(公告)日：2013-06-13

申请号：US13690435

申请日：2012-11-30

Applicant: LSI Corporation

Inventor： Ming Jin ,  Erich F. Haratsch ,  Jason S. Goldberg ,  Kurt J. Worrell ,  Scott M. Dziak ,  Jeffrey P. Grundvig

IPC: G11B27/36

CPC classification number: G11B27/36 ,  G11B5/6076 ,  G11B2220/2516

Abstract: A contact event between a sensing device and a storage medium is detected by receiving a signal indicating a physical proximity between the sensing device and the storage medium; generating a plurality of frequency bin outputs; comparing one or more frequency bin outputs to a corresponding first level threshold to yield a corresponding comparator output; summing the comparator output with at least one prior instance of the comparator output to yield an aggregated value; comparing the aggregated value to an aggregate threshold to yield an aggregate output; and generating a contact event output if one or more of a first group of the plurality of frequency bin outputs has an associated aggregate output set to a predefined binary value and a predefined minimum number of a second group of the plurality of frequency bin outputs has an associated aggregate output set to a predefined binary value.

Abstract translation: 通过接收指示感测装置和存储介质之间的物理接近的信号来检测感测装置和存储介质之间的接触事件; 产生多个频率仓输出; 将一个或多个频率仓输出与相应的第一电平阈值进行比较以产生相应的比较器输出; 将比较器输出与比较器输出的至少一个先前实例相加以产生聚合值; 将聚合值与聚合阈值进行比较以产生总产出; 以及如果所述多个频率仓输出中的第一组中的一个或多个具有设置为预定二进制值的相关联的聚合输出并且所述多个频率仓输出中的第二组的预定最小数量具有 关联的聚合输出设置为预定义的二进制值。

公开(公告)号：US09082480B2

公开(公告)日：2015-07-14

申请号：US13780203

申请日：2013-02-28

Applicant: LSI Corporation

Inventor： Adbel Hakim S. Alhussien ,  Wu Chang ,  Erich F. Haratsch ,  Ming Jin

IPC: G11C11/34 ,  G11C16/04 ,  G11C11/56

CPC classification number: G11C16/04 ,  G11C11/5642

Abstract: Methods and apparatus are provided for detection and decoding in flash memories with error correlations for a plurality of bits within a sliding window. Data from a flash memory device is processed by obtaining one or more read values for a plurality of bits from one or more pages of the flash memory device; converting the one or more read values for the plurality of bits to a non-binary log likelihood ratio based on a probability that a given data pattern was written to the plurality of bits when a particular pattern was read from the plurality of bits; and decoding the plurality of bits using a binary decoder. The non-binary log likelihood ratio captures one or more of intra-page correlations and/or intra-cell correlations. A least significant bit and a most significant bit of a given cell can be independently converted and/or jointly converted to the non-binary log likelihood ratio.

Abstract translation: 提供了用于在闪速存储器中进行检测和解码的方法和装置，其具有滑动窗口内的多个位的误差相关性。 来自闪存设备的数据通过从闪存设备的一个或多个页面获得多个位的一个或多个读取值来处理; 基于当从多个比特读取特定模式时将给定数据模式写入多个比特的概率，将多个比特的一个或多个读取值转换为非二进制对数似然比; 以及使用二进制解码器对所述多个比特进行解码。 非二进制对数似然比捕获页内相关和/或小区内相关中的一个或多个。 给定单元的最低有效位和最高有效位可以独立地转换和/或共同转换为非二进制对数似然比。

公开(公告)号：US08908305B1

公开(公告)日：2014-12-09

申请号：US14446215

申请日：2014-07-29

Applicant: LSI Corporation

Inventor： Ming Jin ,  Haitao Xia ,  Wu Chang

IPC: G11B27/36 ,  G11B21/02

CPC classification number: G11B5/6011 ,  G11B27/36 ,  G11B2220/20

Abstract: Systems and method relating generally to data processing, and more particularly to systems and methods for determining head stability.

Abstract translation: 一般涉及数据处理的系统和方法，更具体地涉及用于确定磁头稳定性的系统和方法。

公开(公告)号：US08811136B2

公开(公告)日：2014-08-19

申请号：US13680497

申请日：2012-11-19

Applicant: LSI Corporation

Inventor： Scott M. Dziak ,  Ming Jin ,  Jonathan Dykhuis

IPC: G11B7/00 ,  G11B27/36

CPC classification number: G11B27/36 ,  G11B20/182 ,  G11B2220/2516

Abstract: The disclosure is directed to a system and method for detecting and classifying at least one media defect. A periodic pattern is written to a medium to yield at least one waveform. The magnitude of the waveform is compared against a defect threshold to detect the presence or absence of media defects in the medium. When at least one defect is detected, a magnitude for each of at least two harmonics of the waveform is determined in the defect range. The defect is classified by comparing a ratio of the magnitudes of the at least two harmonics against a classification threshold.

Abstract translation: 本公开涉及用于检测和分类至少一个介质缺陷的系统和方法。 将周期性图案写入介质以产生至少一个波形。 将波形的大小与缺陷阈值进行比较，以检测介质中是否存在介质缺陷。 当检测到至少一个缺陷时，在缺陷范围内确定波形的至少两个谐波中的每一个的幅度。 通过比较至少两个谐波的幅度与分类阈值的比值来分类缺陷。

公开(公告)号：US20130176780A1

公开(公告)日：2013-07-11

申请号：US13780203

申请日：2013-02-28

Applicant: LSI Corporation

Inventor： Adbel Hakim S. Alhussien ,  Wu Chang ,  Erich F. Haratsch ,  Ming Jin

IPC: G11C16/04

CPC classification number: G11C16/04 ,  G11C11/5642

Abstract: Methods and apparatus are provided for detection and decoding in flash memories with error correlations for a plurality of bits within a sliding window. Data from a flash memory device is processed by obtaining one or more read values for a plurality of bits from one or more pages of the flash memory device; converting the one or more read values for the plurality of bits to a non-binary log likelihood ratio based on a probability that a given data pattern was written to the plurality of bits when a particular pattern was read from the plurality of bits; and decoding the plurality of bits using a binary decoder. The non-binary log likelihood ratio captures one or more of intra-page correlations and/or intra-cell correlations. A least significant bit and a most significant bit of a given cell can be independently converted and/or jointly converted to the non-binary log likelihood ratio.

Abstract translation: 提供了用于在闪速存储器中进行检测和解码的方法和装置，其具有滑动窗口内的多个位的误差相关性。 来自闪存设备的数据通过从闪存设备的一个或多个页面获得多个位的一个或多个读取值来处理; 基于当从多个比特读取特定模式时将给定数据模式写入多个比特的概率，将多个比特的一个或多个读取值转换为非二进制对数似然比; 以及使用二进制解码器对所述多个比特进行解码。 非二进制对数似然比捕获页内相关和/或小区内相关中的一个或多个。 给定单元的最低有效位和最高有效位可以独立地转换和/或共同转换为非二进制对数似然比。

公开(公告)号：US20150325266A1

公开(公告)日：2015-11-12

申请号：US14278188

申请日：2014-05-15

Applicant: LSI Corporation

Inventor： Wu Chang ,  Parviz Rahgozar ,  Ming Jin ,  Haitao Xia

IPC: G11B20/10

CPC classification number: G11B20/10509 ,  G11B20/10009 ,  G11B20/10481

Abstract: Variations of the Nelder-Mead direct search method are employed to find read channel parameter settings in a discrete field having three or more dimensions. The three or more dimensions correspond to read channel parameters, at least some of which are highly correlated. The steps of the Nelder-Mead method are executed according to a methodology to arrive at substantially optimal parameter settings for a read channel, even where a discrete function defining parameter outcomes is noisy. In some embodiments, dimensional collapse, considered inefficient in a two-dimensional field, is allowed in order to reach an optimal solution in a greater-than-two-dimensional field.

Abstract translation: 采用Nelder-Mead直接搜索方法的变化来在具有三维或更多维度的离散场中找到读通道参数设置。 三个或更多维度对应于读通道参数，其中至少一些是高度相关的。 Nelder-Mead方法的步骤是根据方法执行的，以便为读通道达到基本上最佳的参数设置，即使定义参数结果的离散函数是嘈杂的。 在一些实施例中，为了在大于二维的场中达到最优解，允许在二维场中被认为是无效的尺寸塌陷。

公开(公告)号：US09171572B1

公开(公告)日：2015-10-27

申请号：US14278188

申请日：2014-05-15

Applicant: LSI Corporation

Inventor： Wu Chang ,  Parviz Rahgozar ,  Ming Jin ,  Haitao Xia

IPC: G11B5/09 ,  G11B20/10

CPC classification number: G11B20/10509 ,  G11B20/10009 ,  G11B20/10481

Abstract: Variations of the Nelder-Mead direct search method are employed to find read channel parameter settings in a discrete field having three or more dimensions. The three or more dimensions correspond to read channel parameters, at least some of which are highly correlated. The steps of the Nelder-Mead method are executed according to a methodology to arrive at substantially optimal parameter settings for a read channel, even where a discrete function defining parameter outcomes is noisy. In some embodiments, dimensional collapse, considered inefficient in a two-dimensional field, is allowed in order to reach an optimal solution in a greater-than-two-dimensional field.

Abstract translation: 采用Nelder-Mead直接搜索方法的变化来在具有三维或更多维度的离散场中找到读通道参数设置。 三个或更多维度对应于读通道参数，其中至少一些是高度相关的。 Nelder-Mead方法的步骤是根据方法执行的，以便为读通道达到基本上最佳的参数设置，即使定义参数结果的离散函数是嘈杂的。 在一些实施例中，为了在大于二维的场中达到最优解，允许在二维场中被认为是无效的尺寸塌陷。

公开(公告)号：US20150015984A1

公开(公告)日：2015-01-15

申请号：US14500226

申请日：2014-09-29

Applicant: LSI Corporation

Inventor： Ming Jin ,  Erich F. Haratsch ,  George Mathew ,  Jongseung Park ,  Timothy W. Swatosh ,  Timothy B. Lund ,  Carl E. Forham

IPC: G11B5/09 ,  G11B20/10

CPC classification number: G11B5/09 ,  G11B5/012 ,  G11B19/045 ,  G11B20/10046 ,  G11B20/10212 ,  G11B20/10462 ,  G11B20/1217 ,  G11B20/1423 ,  G11B2020/10759 ,  G11B2020/1232 ,  G11B2020/1298 ,  G11B2020/183 ,  G11B2020/185 ,  G11B2020/1856 ,  G11B2220/2516

Abstract: Described embodiments provide a method of cancelling inter-track interference (ITI) from one or more sectors read from a desired track of a storage medium. A read channel reads sectors in a desired track of the storage medium. A decoder of the read channel decodes the read sectors, and if the read sectors are incorrectly recovered from the storage medium, selected sectors of a first adjacent track and a second adjacent track are read. An ITI canceller of the read channel estimates ITI in the read sectors of the desired track corresponding to the selected sectors of each adjacent track and subtracts the estimated ITI of each adjacent track from the data for the sectors of the desired track, providing updated sector data. The ITI cancelled data is replayed to the decoder, Which decodes the ITT cancelled data and provides the decoded ITI cancelled data as output of the read channel.

Abstract translation: 所描述的实施例提供了从存储介质的期望轨迹读取的一个或多个扇区消除轨道间干扰（ITI）的方法。 读通道读取存储介质的期望轨道中的扇区。 读通道的解码器解码读扇区，并且如果从存储介质中错误地恢复读扇区，则读取第一相邻轨道和第二相邻轨道的选定扇区。 读通道的ITI消除器估计对应于每个相邻磁道的所选扇区的期望磁道的读扇区中的ITI，并从期望磁道的扇区的数据中减去每个相邻磁道的估计ITI，从而提供更新的扇区数据 。 ITI取消的数据被重播到解码器，解码器解码ITT取消的数据，并将解码的ITI取消的数据作为读取通道的输出。

公开(公告)号：US08917467B1

公开(公告)日：2014-12-23

申请号：US14109804

申请日：2013-12-17

Applicant: LSI Corporation

Inventor： Haitao Xia ,  Jianzhong Huang ,  Ming Jin ,  Wu Chang

IPC: G11B5/09

CPC classification number: G11B20/10009 ,  G11B5/09

Abstract: Systems, methods, devices, circuits for data processing, and more particularly to data processing including adjacent track interference mitigation.

Abstract translation: 用于数据处理的系统，方法，设备，电路，更具体地涉及包括相邻轨道干扰减轻的数据处理。