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1. 发明授权

US09397698B1 Methods and apparatus for error recovery in memory systems employing iterative codes 有权
标题翻译：使用迭代代码的存储器系统中的错误恢复方法和装置
公开(公告)号：US09397698B1
公开(公告)日：2016-07-19
申请号：US14310673
申请日：2014-06-20
申请人： Marvell International Ltd.
发明人： Gregory Burd , Nedeljko Varnica , Yifei Zhang , Nitin Nangare
IPC分类号： H03M13/11 , H03M13/37 , H03M13/29 , H03M13/00 , H03M13/41
CPC分类号： H03M13/1128 , H03M13/1105 , H03M13/1142 , H03M13/152 , H03M13/2906 , H03M13/3707 , H03M13/3715 , H03M13/3723 , H03M13/4138 , H03M13/458 , H03M13/6331 , H04L1/0042 , H04L1/0051 , H04L1/0057
摘要： Systems and methods for error recovery are presented. Data is decoded with an iterative decoding scheme having a first set of parameters. In response to a determination that the iterative decoding scheme has failed, the data is re-read. While the data is being re-read, the iterative decoding scheme is reconfigured with a second set of parameters, and the data is decoded with the reconfigured iterative decoding scheme. In response to determination that the reconfigured iterative decoding scheme has failed, an error type associated with the data is determined. An error recovery scheme is selected from a plurality of error recovery schemes for the data based on the determined error type.
摘要翻译：介绍了错误恢复的系统和方法。用具有第一组参数的迭代解码方案对数据进行解码。响应于迭代解码方案失败的确定，重新读取数据。在重新读取数据的同时，使用第二组参数来重新配置迭代解码方案，并用重新配置的迭代解码方案对数据进行解码。响应于确定重新配置的迭代解码方案已经失败，确定与数据相关联的错误类型。基于所确定的错误类型，从用于数据的多个错误恢复方案中选择错误恢复方案。

2. 发明授权

US08804259B1 Systems and methods for revising data in a signal read from a storage medium according to a calculated gain 有权
标题翻译：根据计算的增益来修改从存储介质读取的信号中的数据的系统和方法
公开(公告)号：US08804259B1
公开(公告)日：2014-08-12
申请号：US14176502
申请日：2014-02-10
申请人： Marvell International Ltd.
发明人： Hongxin Song , Michael Madden , Gregory Burd , Nitin Nangare
IPC分类号： G11B5/09 , G11B5/035
CPC分类号： G11B5/09 , G11B5/012 , G11B20/10009 , G11B20/10222
摘要： A system including an analog front end module, an equalizer module, a detector module, and a gain module. The analog front end module is configured to sample a signal read from a storage medium, convert the sampled signal into a digital signal, and output the digital signal. The equalizer module is configured to equalize the digital signal and output a data vector that corresponds to the equalized digital signal. The data vector represents data in the signal read from the storage medium. The detector module is configured to output a decision vector that corresponds to a noise-free ideal output vector of the decoded data vector. The gain module is configured to calculate a gain value based on the decision vector and the data vector, apply the gain value to the data vector, and output a revised data vector based on the data vector and the applied gain value.
摘要翻译：一种包括模拟前端模块，均衡器模块，检测器模块和增益模块的系统。模拟前端模块被配置为对从存储介质读取的信号进行采样，将采样信号转换为数字信号，并输出数字信号。均衡器模块被配置为均衡数字信号并输出对应于均衡的数字信号的数据矢量。数据矢量表示从存储介质读取的信号中的数据。检测器模块被配置为输出对应于解码数据向量的无噪声理想输出向量的判决向量。所述增益模块被配置为基于所述判定向量和所述数据向量来计算增益值，将所述增益值应用于所述数据向量，并且基于所述数据矢量和所施加的增益值输出修正的数据向量。

3. 发明授权

US08464119B1 Defect recovery for iteratively-decoded data channel 有权
标题翻译：用于迭代解码数据通道的缺陷恢复
公开(公告)号：US08464119B1
公开(公告)日：2013-06-11
申请号：US13669979
申请日：2012-11-06
申请人： Marvell International Ltd.
发明人： Shaohua Yang , Nedeljko Varnica , Nitin Nangare , Zining Wu
IPC分类号： H03M13/00 , H04L1/18 , G06F11/00
CPC分类号： H04L1/0054 , H03M13/2987 , H03M13/4138 , H03M13/6331 , H04L1/005 , H04L1/0065 , H04L1/0071
摘要： In iterative decoding, a data recovery scheme corrects for corrupted or defective data by incorporating results from a previous decoding iteration. In one embodiment, a final multiplexer selects between the final detector output or a previous detector output based on the absence or presence of defective data. In another embodiment, the branch metrics for the defective data, which otherwise would be combined with a priori LLRs from an outer decoder of a prior stage, are ignored so that the a priori LLRs themselves are used alone. The two embodiments can be used together.
摘要翻译：在迭代解码中，数据恢复方案通过结合先前的解码迭代的结果来校正损坏的或有缺陷的数据。在一个实施例中，最终多路复用器根据不存在或存在缺陷数据在最终检测器输出或先前检测器输出之间进行选择。在另一个实施例中，将忽略否则将与来自前一级的外部解码器的先验LLR组合的缺陷数据的分支量度，以使得单独使用先验LLR本身。两个实施例可以一起使用。

4. 发明授权

US09438276B2 Method and apparatus for improved performance of iterative decoders on channels with memory 有权
标题翻译：用于改善具有存储器的通道上的迭代解码器性能的方法和装置
公开(公告)号：US09438276B2
公开(公告)日：2016-09-06
申请号：US13674767
申请日：2012-11-12
申请人： Marvell International Ltd.
发明人： Nedeljko Varnica , Nitin Nangare , Gregory Burd , Zining Wu
IPC分类号： H03M13/00 , H03M13/11 , H03M13/29 , H03M13/39 , H03M13/41
CPC分类号： H03M13/6331 , H03M13/1105 , H03M13/2957 , H03M13/3905 , H03M13/4138
摘要： Systems and methods for improving the performance of iterative decoders on various channels with memory are disclosed. These systems and methods may reduce the frequency or number of situations in which the iterative decoder cannot produce decoded data that matches the data that was originally sent in a communications or data storage system. The iterative decoder includes a SISO channel detector and an ECC decoder and decodes the coded information according to at least one iterative decoding algorithm in regular decoding mode and/or at least one iterative decoding algorithm in error-recovery mode.
摘要翻译：公开了用于改善具有存储器的各种通道上的迭代解码器的性能的系统和方法。这些系统和方法可以减少迭代解码器不能产生与最初在通信或数据存储系统中发送的数据匹配的解码数据的情况的频率或数量。迭代解码器包括SISO信道检测器和ECC解码器，并且按照常规解码模式中的至少一个迭代解码算法和/或错误恢复模式中的至少一个迭代解码算法解码编码信息。

5. 发明授权

US08773792B1 Systems and methods for inter-track interference cancellation in magnetic recording channels 有权
标题翻译：磁记录通道中轨道间干扰消除的系统和方法
公开(公告)号：US08773792B1
公开(公告)日：2014-07-08
申请号：US14028805
申请日：2013-09-17
申请人： Marvell International Ltd.
发明人： Hongxin Song , Nitin Nangare , Michael Madden , Gregory Burd
IPC分类号： G11B5/09 , G11B5/035
CPC分类号： G11B5/09 , G11B5/012 , G11B20/10009 , G11B20/10222
摘要： A system including an analog front end module to receive a first signal generated by reading data from a storage medium storing the data in concentric tracks, sample the first signal, and output a second signal based on the sampling of the first signal. An equalizer module generates a first vector based on the second signal. The first vector represents the data in the first signal. A detector module generates a second vector based on the first vector. The second vector represents a noise-free vector corresponding to the first vector. A re-timing module re-samples a plurality of samples in the first vector based on the second vector and generates a third vector based on the re-sampling of the plurality of samples in the first vector. An inter-track interference cancellation module removes inter-track interference from the third vector.
摘要翻译：一种包括模拟前端模块的系统，用于接收通过从存储在同心轨道中的数据的存储介质读取数据而产生的第一信号，对第一信号进行采样，并且基于第一信号的采样来输出第二信号。均衡器模块基于第二信号产生第一矢量。第一个向量表示第一个信号中的数据。检测器模块基于第一矢量生成第二矢量。第二矢量代表对应于第一矢量的无噪声矢量。重新定时模块基于第二向量对第一向量中的多个样本重新采样，并且基于第一向量中的多个样本的重新采样生成第三矢量。轨道间干扰消除模块消除来自第三矢量的轨道间干扰。

6. 发明授权

US09385757B1 Systems and methods for using a non-binary soft output viterbi algorithm 有权
标题翻译：使用非二进制软输出维特比算法的系统和方法
公开(公告)号：US09385757B1
公开(公告)日：2016-07-05
申请号：US14031637
申请日：2013-09-19
申请人： Marvell International Ltd.
发明人： Nitin Nangare
IPC分类号： H03M13/41 , H03M13/25 , H03M13/53 , H04L1/00
CPC分类号： H03M13/256 , H03M13/3983 , H03M13/41 , H03M13/4146 , H04L1/006
摘要： Systems and methods are provided for generating a likelihood value. A detector identifies a winning path through a trellis and a plurality of losing paths through the trellis and computes path metric differences within the trellis based on the winning path and at least some of the plurality of losing paths. The detector calculates a pair of error metrics based on the path metric differences and determines the likelihood value based on a difference between the pair of error metrics.
摘要翻译：提供了用于生成似然值的系统和方法。检测器通过网格和通过网格的多个丢失路径识别获胜路径，并且基于获胜路径和多个丢失路径中的至少一些来计算网格内的路径度量差异。检测器基于路径度量差计算一对误差量度，并且基于该对误差度量之间的差异来确定似然值。

7. 发明授权

US08891195B1 Method and system for compensating for track squeeze 有权
标题翻译：轨道挤压补偿方法及系统
公开(公告)号：US08891195B1
公开(公告)日：2014-11-18
申请号：US14096274
申请日：2013-12-04
申请人： Marvell International Ltd.
发明人： Gregory Burd , Nitin Nangare
IPC分类号： G11B5/596 , G11B27/36 , G11B5/02 , G11B20/18 , G11B20/10
CPC分类号： G11B20/10046 , G11B5/012 , G11B5/09 , G11B19/044 , G11B19/045 , G11B20/18
摘要： A storage device includes a storage medium having a plurality of tracks of data. Reading apparatus for reading a current track of data that has been subject to previous encroachment to an extent from at least one adjacent track of data includes a write head that writes interfering data to the adjacent track of data while intentionally encroaching at least to that extent onto the current track of data, and circuitry that recovers data on the current track of data using the interfering data. A method for reading a current track of data, that has been subject to previous encroachment to an extent from at least one adjacent track of data, includes writing interfering data to the adjacent track of data while intentionally encroaching at least to that extent onto the current track of data, and recovering data on the current track of data using the interfering data.
摘要翻译：存储装置包括具有多个数据轨迹的存储介质。用于读取已经受到来自至少一个相邻数据轨道的先前侵占的数据的当前轨迹的读取装置包括写入头，其将干扰数据写入数据的相邻轨道，同时至少有意地侵入到数据的当前轨迹以及使用干扰数据恢复当前数据轨迹上的数据的电路。一种用于读取当前数据轨迹的方法，该方法已经受到来自至少一个相邻数据轨迹的一定程度的先前侵扰，包括将干扰数据写入相邻的数据轨道，同时至少在这种程度上侵蚀到当前跟踪数据，并使用干扰数据恢复当前数据轨迹上的数据。

8. 发明申请

US20130073922A1 METHOD AND APPARATUS FOR IMPROVED PERFORMANCE OF ITERATIVE DECODERS ON CHANNELS WITH MEMORY 审中-公开
标题翻译：迭代解码器与存储器通道的改进性能的方法和装置
公开(公告)号：US20130073922A1
公开(公告)日：2013-03-21
申请号：US13674767
申请日：2012-11-12
申请人： MARVELL INTERNATIONAL LTD.
发明人： Nedeljko Varnica , Nitin Nangare , Gregory Burd , Zining Wu
IPC分类号： H03M13/13
CPC分类号： H03M13/6331 , H03M13/1105 , H03M13/2957 , H03M13/3905 , H03M13/4138
摘要： Systems and methods for improving the performance of iterative decoders on various channels with memory are disclosed. These systems and methods may reduce the frequency or number of situations in which the iterative decoder cannot produce decoded data that matches the data that was originally sent in a communications or data storage system. The iterative decoder includes a SISO channel detector and an ECC decoder and decodes the coded information according to at least one iterative decoding algorithm in regular decoding mode and/or at least one iterative decoding algorithm in error-recovery mode.
摘要翻译：公开了用于改善具有存储器的各种通道上的迭代解码器的性能的系统和方法。这些系统和方法可以减少迭代解码器不能产生与最初在通信或数据存储系统中发送的数据匹配的解码数据的情况的频率或数量。迭代解码器包括SISO信道检测器和ECC解码器，并且按照常规解码模式中的至少一个迭代解码算法和/或错误恢复模式中的至少一个迭代解码算法解码编码信息。

9. 发明授权

US11068544B2 Systems and methods for generating metadata describing unstructured data objects at the storage edge 有权
公开(公告)号：US11068544B2
公开(公告)日：2021-07-20
申请号：US16263387
申请日：2019-01-31
申请人： Marvell International Ltd.
发明人： Konstantin Kudryavtsev , Noam Mizrahi , Mats Oberg , Nedeljko Varnica , Nitin Nangare , Igor Polivanyi , Ruwan Ratnayake , Leo Jiang , Quynh Chau , Wen Lung Chang
IPC分类号： G06F16/907 , G06F16/901 , G06F16/9038 , G06F16/9035 , G06F16/783 , G06F16/387 , G06F16/683 , G06F16/383 , G06F3/06 , G06N3/08 , G06F12/1045 , G06F15/173 , H04L12/879 , H04L29/08
摘要： A storage control device coupled to a storage device and located remotely from a host device receives media object data from the host device. The storage control device identifies a type of the media object data and select, based on the identified type, a computational model from among a plurality of computational models for use by a computational engine of the storage control device. The computational engine uses the selected computational model to generate metadata describing the media object data. The metadata is stored in the storage device so as to be selectively retrievable from the storage device separately from the media object data.

10. 发明授权

US10008228B1 Method and apparatus for determining read-head deviation using orthogonal preambles 有权
公开(公告)号：US10008228B1
公开(公告)日：2018-06-26
申请号：US15622713
申请日：2017-06-14
申请人： Marvell International Ltd.
发明人： Nitin Nangare
IPC分类号： G11B5/58 , G11B5/596 , G11B20/12
CPC分类号： G11B5/59627 , G11B5/4886 , G11B20/10046 , G11B20/10314 , G11B20/10388
摘要： In a storage device, data is written to tracks on a storage medium. Data for each track includes a preamble. The preamble in any current track is orthogonal to the preamble in any track adjacent to the current track. A first read head is positioned over the current track and off-center toward a first adjacent track on a first side of the current track to detect first signals from among the current track, the first adjacent track, and a second adjacent track on a second side of the current track. A second read head is positioned over the current track and off-center relative to the current track toward the second adjacent track to detect second signals from among the current track, the first adjacent track, and the second adjacent track. Analyzing the first and second signals determines an amount by which the read heads are off-track from the current track.

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