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1. 发明授权

US08593747B1 Hybrid defect detection for recording channels 有权
标题翻译：记录通道的混合缺陷检测
公开(公告)号：US08593747B1
公开(公告)日：2013-11-26
申请号：US13719312
申请日：2012-12-19
申请人： Xueshi Yang , Yu-Yao Chang , Michael Madden , Zining Wu
发明人： Xueshi Yang , Yu-Yao Chang , Michael Madden , Zining Wu
IPC分类号： G11B5/02 , G11B27/36
CPC分类号： G11B20/1816 , G11B2220/2516
摘要： An apparatus includes: a signal module to process data signals corresponding to data on a storage medium to generate signal samples; a defect detector to receive the signal samples, apply a set of parameters to the signal samples, and generate an output based on a count of signal samples that are associated with abnormal signal quality, the signal samples that are associated with abnormal signal quality being included in a portion of the signal samples determined in accordance with the set of parameters; and circuitry to receive the output from the defect detector and identify one or more media defects based on the output.
摘要翻译：一种装置包括：信号模块，用于处理与存储介质上的数据相对应的数据信号，以产生信号采样; 用于接收信号样本的缺陷检测器，将一组参数应用于信号样本，并且基于与异常信号质量相关联的信号样本的计数产生输出，包括与异常信号质量相关联的信号样本在根据该组参数确定的信号样本的一部分中; 以及用于从缺陷检测器接收输出并基于输出识别一个或多个介质缺陷的电路。

2. 发明授权

US08164846B1 Hybrid defect detection for recording channels 有权
标题翻译：记录通道的混合缺陷检测
公开(公告)号：US08164846B1
公开(公告)日：2012-04-24
申请号：US12336308
申请日：2008-12-16
申请人： Xueshi Yang , Yu-Yao Chang , Michael Madden , Zining Wu
发明人： Xueshi Yang , Yu-Yao Chang , Michael Madden , Zining Wu
IPC分类号： G11B5/02 , G11B27/36
CPC分类号： G11B20/1816 , G11B2220/2516
摘要： Methods, systems and computer program products for performing hybrid defect detection are disclosed. A hybrid defect detection mechanism may be used to detect various classes of defects (e.g., long and shallow defects, and short and deep defects) while reducing the probability of a miss or false alarm. In some implementations, the hybrid defect detection mechanism may utilize a defect detector that includes one or more defect sub-detectors. Each defect sub-detector may be associated with an individual threshold and sliding window length to enhance the hybrid defect detection process that maximizes the detection of a specific type or class of defects.
摘要翻译：公开了用于执行混合缺陷检测的方法，系统和计算机程序产品。可以使用混合缺陷检测机构来检测各种类型的缺陷（例如，长而浅的缺陷以及短而深的缺陷），同时降低错误或虚假警报的可能性。在一些实施方案中，混合缺陷检测机构可以利用包括一个或多个缺陷子检测器的缺陷检测器。每个缺陷子检测器可以与单个阈值和滑动窗口长度相关联，以增强最大化特定类型或类别的缺陷的检测的混合缺陷检测过程。

3. 发明授权

US08339720B1 Hybrid defect detection for recording channels 有权
标题翻译：记录通道的混合缺陷检测
公开(公告)号：US08339720B1
公开(公告)日：2012-12-25
申请号：US13419070
申请日：2012-03-13
申请人： Xueshi Yang , Yu-Yao Chang , Michael Madden , Zining Wu
发明人： Xueshi Yang , Yu-Yao Chang , Michael Madden , Zining Wu
IPC分类号： G11B5/02 , G11B27/36
CPC分类号： G11B20/1816 , G11B2220/2516
摘要： Methods, systems and computer program products for performing hybrid defect detection are disclosed. A hybrid defect detection mechanism may be used to detect various classes of defects (e.g., long and shallow defects, and short and deep defects) while reducing the probability of a miss or false alarm. In some implementations, the hybrid defect detection mechanism may utilize defect detectors to each receive signal samples and apply a different set of parameters indicating a different respective window to the signal samples. Each defect detector may generate a corresponding output based on a count of signal samples within the corresponding window that are associated with abnormal signal quality.
摘要翻译：公开了用于执行混合缺陷检测的方法，系统和计算机程序产品。可以使用混合缺陷检测机构来检测各种类型的缺陷（例如，长而浅的缺陷以及短而深的缺陷），同时降低错误或虚假警报的可能性。在一些实现中，混合缺陷检测机制可以利用每个接收信号样本的缺陷检测器，并且向信号样本应用指示不同相应窗口的不同参数集合。每个缺陷检测器可以基于与异常信号质量相关联的对应窗口内的信号样本的计数来生成相应的输出。

4. 发明授权

US07538967B1 Method and apparatus for estimating a position of a head in a disk drive 有权
标题翻译：用于估计磁盘驱动器中磁头位置的方法和装置
公开(公告)号：US07538967B1
公开(公告)日：2009-05-26
申请号：US11765889
申请日：2007-06-20
申请人： Xueshi Yang , Michael Madden , Zining Wu
发明人： Xueshi Yang , Michael Madden , Zining Wu
IPC分类号： G11B5/596 , H04B15/00
CPC分类号： G11B5/5556 , G11B5/59611
摘要： In a method for providing an estimate of a head position for a disk drive, a readback signal is filtered. The readback signal includes a first position signal component corresponding to a first position pattern on a disk, and includes a second position signal component corresponding to a second position pattern on the disk. Filtering the readback signal enhances a signal-to-noise ratio (SNR) of the readback signal with respect to the first position signal component and the second position signal component. An estimate of an amplitude of the first position signal component is generated based on the filtered readback signal, and an estimate of an amplitude of the second position signal component is generated based on the filtered readback signal. An estimate of a head position with respect to a track on the disk is generated based on the estimate of the amplitude of the first position signal component and the estimate of the amplitude of the second position signal component.
摘要翻译：在用于提供磁盘驱动器的磁头位置的估计的方法中，滤波回读信号。回读信号包括对应于盘上的第一位置图案的第一位置信号分量，并且包括对应于盘上的第二位置图案的第二位置信号分量。过滤回读信号增强了回读信号相对于第一位置信号分量和第二位置信号分量的信噪比（SNR）。基于经滤波的回读信号生成第一位置信号分量的振幅的估计，并且基于滤波的回读信号生成第二位置信号分量的振幅的估计。基于第一位置信号分量的振幅的估计和第二位置信号分量的振幅的估计，产生相对于磁盘上的磁道的磁头位置的估计。

5. 发明授权

US07933092B1 Method and apparatus for estimating a position of a head in a disk drive 有权
标题翻译：用于估计磁盘驱动器中磁头位置的方法和装置
公开(公告)号：US07933092B1
公开(公告)日：2011-04-26
申请号：US12470987
申请日：2009-05-22
申请人： Xueshi Yang , Michael Madden , Zining Wu
发明人： Xueshi Yang , Michael Madden , Zining Wu
IPC分类号： G11B5/596
CPC分类号： G11B5/5556 , G11B5/59611
摘要： In a method for providing an estimate of a head position for a disk drive, a readback signal is filtered. The readback signal includes a first position signal component corresponding to a first position pattern on a disk, and includes a second position signal component corresponding to a second position pattern on the disk. Filtering the readback signal includes using a filter determined based on statistical information regarding a noise component of the readback signal. An estimate of an amplitude of the first position signal component is generated based on the filtered readback signal, and an estimate of an amplitude of the second position signal component is generated based on the filtered readback signal. An estimate of a head position with respect to a track on the disk is generated based on the estimate of the amplitude of the first position signal component and the estimate of the amplitude of the second position signal component.
摘要翻译：在用于提供磁盘驱动器的磁头位置的估计的方法中，滤波回读信号。回读信号包括对应于盘上的第一位置图案的第一位置信号分量，并且包括对应于盘上的第二位置图案的第二位置信号分量。过滤回读信号包括使用基于关于回读信号的噪声分量的统计信息确定的滤波器。基于经滤波的回读信号生成第一位置信号分量的振幅的估计，并且基于滤波的回读信号生成第二位置信号分量的振幅的估计。基于第一位置信号分量的振幅的估计和第二位置信号分量的振幅的估计，产生相对于磁盘上的磁道的磁头位置的估计。

6. 发明授权

US09048879B1 Error correction system using an iterative product code 有权
标题翻译：纠错系统使用迭代产品代码
公开(公告)号：US09048879B1
公开(公告)日：2015-06-02
申请号：US13586710
申请日：2012-08-15
申请人： Shaohua Yang , Zining Wu , Gregory Burd , Xueshi Yang , Hongwei Song , Nedeljko Varnica
发明人： Shaohua Yang , Zining Wu , Gregory Burd , Xueshi Yang , Hongwei Song , Nedeljko Varnica
IPC分类号： H03M13/29 , H04L1/00
CPC分类号： H03M13/2945 , H03M13/098 , H03M13/1102 , H03M13/1515 , H03M13/23 , H03M13/2909 , H03M13/2957 , H03M13/3746 , H04L1/0065
摘要： An error correction system includes an iterative code that employs an interleaved component code and an embedded parity component code. In some embodiments, on the transmission side, input signals received at an input node are encoded based on the interleaved code, which encodes an interleaved version of the input data to produce a first set of codewords. At least a portion of the first set of codewords preferably is divided into a plurality of symbols which are encoded based on the embedded parity code to provide encoded data. Similarly, in some embodiments, on the receiving side, received data are detected to produce detected information and soft outputs. The detected information is decoded based on the embedded parity code to obtain decoded information. The decoded information preferably is used, together with other soft information, by an interleaved decoder to generate reliability metrics for biasing a subsequent decoding iteration.
摘要翻译：纠错系统包括使用交织分量代码和嵌入奇偶校验分量代码的迭代代码。在一些实施例中，在传输侧，在输入节点处接收的输入信号基于交织的代码进行编码，该代码编码输入数据的交错版本以产生第一组码字。第一组码字的至少一部分优选地被划分为多个符号，这些符号基于嵌入的奇偶校验码被编码以提供编码数据。类似地，在一些实施例中，在接收侧，检测所接收的数据以产生检测到的信息和软输出。检测到的信息根据嵌入的奇偶校验码进行解码以获得解码的信息。解码的信息优选地与其他软信息一起被交织的解码器使用以产生用于偏置随后的解码迭代的可靠性度量。

7. 发明授权

US08635508B2 Systems and methods for performing concatenated error correction 有权
标题翻译：用于执行连接纠错的系统和方法
公开(公告)号：US08635508B2
公开(公告)日：2014-01-21
申请号：US13604391
申请日：2012-09-05
申请人： Xueshi Yang , Zining Wu , Seo-How Low
发明人： Xueshi Yang , Zining Wu , Seo-How Low
IPC分类号： H03M13/00
CPC分类号： H03M13/2927 , G06F11/1072 , H03M13/152 , H03M13/2903 , H03M13/2906
摘要： A system and method is provided for performing concatenated error correction. In one implementation, an apparatus for encoding data includes an outer encoder to generate a code word corresponding to received input data and a parity circuit to compute parities of logical cells of data, the logical cells of data being obtained from the code word and having a first logical cell. The apparatus also includes an inner encoder to generate an error correction bit for the first logical cell based on a first parity corresponding to the first logical cell, and to insert the error correction bit in the first logical cell.
摘要翻译：提供了一种用于执行串联纠错的系统和方法。在一个实施方式中，用于编码数据的装置包括外编码器，用于产生与所接收的输入数据相对应的代码字，以及奇偶校验电路来计算数据的逻辑单元的奇偶校验，数据的逻辑单元从代码字获得并具有第一个逻辑单元。该装置还包括内编码器，用于基于与第一逻辑单元相对应的第一奇偶校验位产生第一逻辑单元的纠错位，并将误差校正位插入第一逻辑单元。

8. 发明授权

US08406048B2 Accessing memory using fractional reference voltages 有权
$Accessing memory using fractional reference voltages$
标题翻译：使用分数参考电压访问存储器
公开(公告)号：US08406048B2
公开(公告)日：2013-03-26
申请号：US12535987
申请日：2009-08-05
申请人： Xueshi Yang , Zining Wu
发明人： Xueshi Yang , Zining Wu
IPC分类号： G11C16/04
CPC分类号： G11C16/34 , G11C11/5642 , G11C16/10 , G11C16/28 , G11C2211/5634
摘要： Devices, systems, methods, and other embodiments associated with accessing memory using fractional reference voltage are described. In one embodiment, an apparatus includes comparison logic. The comparison logic compares a threshold voltage of a memory cell to at least one pair of fractional reference voltages to generate comparison results. The apparatus includes read logic to determine a bit value of the memory cell based, at least in part, on the comparison results.
摘要翻译：描述了使用分数参考电压访问存储器的设备，系统，方法和其他实施例。在一个实施例中，一种装置包括比较逻辑。比较逻辑将存储器单元的阈值电压与至少一对分数参考电压进行比较以产生比较结果。该装置包括至少部分地基于比较结果来确定存储器单元的位值的读取逻辑。

9. 发明授权

US08331169B1 Determining threshold voltage distribution in flash memory 有权
标题翻译：确定闪存中的阈值电压分布
公开(公告)号：US08331169B1
公开(公告)日：2012-12-11
申请号：US13323787
申请日：2011-12-12
申请人： Xueshi Yang , Zining Wu , Gregory Burd
发明人： Xueshi Yang , Zining Wu , Gregory Burd
IPC分类号： G11C7/00
CPC分类号： G11C16/26 , G11C16/06 , G11C16/3404
摘要： Methods, apparatuses, and systems for comparing threshold voltages of a plurality of flash memory cells to a plurality of reference voltages. A number of flash memory cells having threshold voltages that fall within each bin of a plurality of bins is determined. The plurality of bins each represent a plurality of threshold voltage ranges. A threshold voltage distribution of the plurality of flash memory cells is calculated based at least in part on the number of flash memory cells that fall into each of the bins.
摘要翻译：用于将多个快闪存储器单元的阈值电压与多个参考电压进行比较的方法，装置和系统。确定具有落在多个箱体的每个箱体内的阈值电压的多个闪存单元。多个箱体各自表示多个阈值电压范围。至少部分地基于落入每个仓的闪存单元的数量来计算多个快闪存储单元的阈值电压分布。

10. 发明授权

US08085605B2 Sequence detection for flash memory with inter-cell interference 有权
标题翻译：具有小区间干扰的闪存的序列检测
公开(公告)号：US08085605B2
公开(公告)日：2011-12-27
申请号：US12191616
申请日：2008-08-14
申请人： Xueshi Yang , Zining Wu
发明人： Xueshi Yang , Zining Wu
IPC分类号： G11C7/18
CPC分类号： G11C16/04 , G11C7/02 , G11C7/14 , G11C16/06 , G11C16/26 , G11C16/3418 , G11C16/3422
摘要： A memory integrated circuit (IC) includes a read module and a sequence detector module. The read module reads S memory cells (cells) located along one of a bit line and a word line and generates S read signals, where S is an integer greater than 1. The sequence detector module detects a data sequence based on the S read signals and reference signals. The data sequence includes data stored in the S cells. Each of the reference signals includes an interference-free signal associated with one of the S cells and an interference signal associated with another of the S cells that is adjacent to the one of the S cells.
摘要翻译：存储器集成电路（IC）包括读取模块和序列检测器模块。读取模块读取沿着位线和字线中的一个位置的S个存储单元（单元），并产生S个读取信号，其中S是大于1的整数。序列检测器模块基于S个读取信号来检测数据序列和参考信号。数据序列包括存储在S单元中的数据。每个参考信号包括与S个小区中的一个相关联的无干扰信号和与S个小区之一相邻的S个小区中的另一个的干扰信号。

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