SYNC MARK DETECTION USING BRANCH METRICS FROM DATA DETECTOR
    21.
    发明申请
    SYNC MARK DETECTION USING BRANCH METRICS FROM DATA DETECTOR 有权
    从数据检测器使用分支量测的SYNC MARK检测

    公开(公告)号:US20140185159A1

    公开(公告)日:2014-07-03

    申请号:US13728443

    申请日:2012-12-27

    申请人: LSI CORPORATION

    IPC分类号: G11B20/14

    CPC分类号: G11B20/10222

    摘要: Methods and apparatus are provided for detecting a sync mark in a storage system, such as a hard disk drive. A sync mark is detected in a storage system by obtaining one or more branch metrics from a data detector in the storage system; generating one or more sync mark metrics using the one or more branch metrics from the data detector; and identifying the sync mark based on the sync mark metrics. An input data set is optionally compared with a plurality of portions of a sync mark pattern to yield corresponding comparison values and the comparison values can be summed to obtain at least one result. A sync mark found signal is asserted based upon the at least one result.

    摘要翻译: 提供了用于检测诸如硬盘驱动器的存储系统中的同步标记的方法和装置。 在存储系统中通过从存储系统中的数据检测器获得一个或多个分支度量来检测同步标记; 使用来自所述数据检测器的所述一个或多个分支度量来生成一个或多个同步标记度量; 以及基于同步标记度量识别同步标记。 输入数据组可选地与同步标记图案的多个部分进行比较,以产生相应的比较值,并且可以将比较值相加以获得至少一个结果。 基于至少一个结果来确定发现同步标记信号。

    MULTI-LEVEL RUN-LENGTH LIMITED FINITE STATE MACHINE FOR MAGNETIC RECORDING CHANNEL
    22.
    发明申请
    MULTI-LEVEL RUN-LENGTH LIMITED FINITE STATE MACHINE FOR MAGNETIC RECORDING CHANNEL 有权
    多级运行有限公司有限公司磁记录通道有限公司

    公开(公告)号:US20140111880A1

    公开(公告)日:2014-04-24

    申请号:US13654893

    申请日:2012-10-18

    申请人: LSI CORPORATION

    IPC分类号: G11B5/02

    摘要: A system is described for constructing maximum transition run modulation code based upon a multi-level run-length limited finite state machine. A processor is configured to receive information from a hard disk drive via a read channel and recover data from the hard disk drive using maximum transition run modulation code. A memory has computer executable instructions configured for execution by the processor to model a magnetic recording channel as a partial response channel, model a source of information to the magnetic recording channel to provide an optimized Markov source, and construct a maximum transition run modulation code to mimic the optimized Markov source based upon a finite state machine having a limited transition run length and a multi-level periodic structure.

    摘要翻译: 描述了一种基于多级游程限制有限状态机来构建最大过渡运行调制码的系统。 处理器被配置为经由读取通道从硬盘驱动器接收信息,并使用最大过渡运行调制码从硬盘驱动器恢复数据。 存储器具有被配置为由处理器执行以将磁记录通道建模为部分响应通道的计算机可执行指令,将信息源建模到磁记录通道以提供优化马尔可夫源,并且构建最大过渡运行调制码 基于具有有限转换行程长度和多级周期性结构的有限状态机模拟优化的马尔可夫源。

    Pattern-dependent LLR manipulation
    23.
    发明授权
    Pattern-dependent LLR manipulation 有权
    模式相关的LLR操作

    公开(公告)号:US08649118B1

    公开(公告)日:2014-02-11

    申请号:US13626030

    申请日:2012-09-25

    申请人: LSI Corporation

    IPC分类号: G11B5/02

    CPC分类号: H03M13/612 G11B20/1833

    摘要: Methods are provided for pattern-dependent log likelihood ratio (LLR) manipulation of a hard disk drive detector output. Generally, by observing a pattern dependency of LLRs, various rules for LLR manipulation at the detector output are outlined. The rules may provide more reliable LLR values, such as by improving signal-to-noise ratio (SNR) of the hard disk drive detector output.

    摘要翻译: 提供了用于硬盘驱动器检测器输出的模式相关对数似然比(LLR)操纵的方法。 通常,通过观察LLR的模式依赖性,概述了检测器输出处的LLR操作的各种规则。 规则可以提供更可靠的LLR值,例如通过提高硬盘驱动器检测器输出的信噪比(SNR)。

    DETECTION AND DECODING IN FLASH MEMORIES WITH ERROR CORRELATIONS FOR A PLURALITY OF BITS WITHIN A SLIDING WINDOW
    24.
    发明申请
    DETECTION AND DECODING IN FLASH MEMORIES WITH ERROR CORRELATIONS FOR A PLURALITY OF BITS WITHIN A SLIDING WINDOW 有权
    闪存存储器中的检测和解码与滑动窗口中的多个位置的错误相关

    公开(公告)号:US20130176780A1

    公开(公告)日:2013-07-11

    申请号:US13780203

    申请日:2013-02-28

    申请人: LSI Corporation

    IPC分类号: G11C16/04

    CPC分类号: G11C16/04 G11C11/5642

    摘要: 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.

    摘要翻译: 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。

    Multi-Dimensional Optimization of Read Channel
    25.
    发明申请
    Multi-Dimensional Optimization of Read Channel 有权
    读通道的多维优化

    公开(公告)号:US20150325266A1

    公开(公告)日:2015-11-12

    申请号:US14278188

    申请日:2014-05-15

    申请人: LSI Corporation

    IPC分类号: G11B20/10

    摘要: 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.

    摘要翻译: 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。

    Multi-dimensional optimization of read channel
    26.
    发明授权
    Multi-dimensional optimization of read channel 有权
    读通道的多维优化

    公开(公告)号:US09171572B1

    公开(公告)日:2015-10-27

    申请号:US14278188

    申请日:2014-05-15

    申请人: LSI Corporation

    IPC分类号: G11B5/09 G11B20/10

    摘要: 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.

    摘要翻译: 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。

    Lookup Tables Utilizing Read Only Memory and Combinational Logic
    28.
    发明申请
    Lookup Tables Utilizing Read Only Memory and Combinational Logic 审中-公开
    使用只读存储器和组合逻辑的查找表

    公开(公告)号:US20140223136A1

    公开(公告)日:2014-08-07

    申请号:US13761892

    申请日:2013-02-07

    申请人: LSI CORPORATION

    IPC分类号: G06F12/10

    CPC分类号: G06F12/1009

    摘要: The disclosure is directed to a system and method for accessing one or more values of a lookup table. In some embodiments, one or more read only memory devices are configured for storing a first plurality of values of the lookup table, and one or more combinational logic circuits are configured for accessing a second plurality of values of the lookup table. At least one of hardware area and timing pressures are mitigated through various storage and access schemes.

    摘要翻译: 本公开针对用于访问查找表的一个或多个值的系统和方法。 在一些实施例中,一个或多个只读存储器设备被配置为存储查找表的第一多个值,并且一个或多个组合逻辑电路被配置用于访问查找表的第二多个值。 通过各种存储和访问方案来减轻硬件面积和时序压力中的至少一个。

    In-channel channel optimization for hard-disc drive read/write chips
    29.
    发明授权
    In-channel channel optimization for hard-disc drive read/write chips 有权
    硬盘驱动器读/写芯片的通道内通道优化

    公开(公告)号:US08773789B1

    公开(公告)日:2014-07-08

    申请号:US13767317

    申请日:2013-02-14

    申请人: LSI Corporation

    IPC分类号: G11B27/36 G11B20/10

    CPC分类号: G11B20/10481

    摘要: In one embodiment, a read/write chip for a hard disc drive has at least one on-chip, in-channel, hardware-based optimization processor that is part of one or more channels (e.g., read, write, and/or servo) of the read/write chip. The optimization processor can iteratively evaluate the performance of a channel for different values of one or more different parameters that control channel processing by generating an appropriate metric value for each different parameter value. The optimization processor can then select an optimal parameter value for subsequent channel processing.

    摘要翻译: 在一个实施例中,用于硬盘驱动器的读/写芯片具有至少一个片上,基于信道内的基于硬件的优化处理器,其是一个或多个通道(例如,读,写和/或伺服)的一部分 )的读/写芯片。 优化处理器可以通过针对每个不同的参数值生成适当的度量值来迭代地评估一个或多个不同参数的不同值的信道的性能,所述不同参数控制信道处理。 然后,优化处理器可以为随后的信道处理选择最佳参数值。

    Constrained System Endec
    30.
    发明申请
    Constrained System Endec 审中-公开
    约束系统Endec

    公开(公告)号:US20140143289A1

    公开(公告)日:2014-05-22

    申请号:US13873224

    申请日:2013-04-30

    申请人: LSI CORPORATION

    IPC分类号: H03M7/30

    CPC分类号: H03M7/30

    摘要: Various embodiments of the present invention provide apparatuses and methods for encoding and decoding data for constrained systems with reduced or eliminated need for hardware and time intensive arithmetic operations such as multiplication and division.

    摘要翻译: 本发明的各种实施例提供了用于对受限制系统的数据进行编码和解码的装置和方法,其中减少或消除了对硬件和诸如乘法和除法之类的时间密集算术运算的需求。