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1. 发明授权

US10261707B1 Decoder memory sharing 有权
公开(公告)号：US10261707B1
公开(公告)日：2019-04-16
申请号：US15467839
申请日：2017-03-23
申请人： Marvell International Ltd.
发明人： Panu Chaichanavong , Gregory Burd
IPC分类号： G06F3/06 , G06F11/10 , H03M13/27 , H03M13/00
摘要： Systems and techniques relating to decoder memory management are described. A described system includes a decoder system configured to perform decoder processes in order to decode signals generated by reading a storage medium, the decoder processes being associated with respective memory thresholds; and a memory structure coupled with the decoder system. The decoder processes use the memory structure in accordance with the respective memory thresholds. The decoder system can be configured to detect whether the memory structure is underutilized by a process of the decoder processes, determine an underutilization amount associated with the process with respect to the memory threshold of the process, identify a target decoder process of the decoder processes, and enable the target decoder process to exceed the memory threshold of the target decoder process based on the underutilization amount. Enabling the target decoder process to exceed can increase decoding performance of the target decoder process.

2. 发明授权

US09946599B1 Systems and methods for enhanced data access to a hard disk drive with caching 有权
公开(公告)号：US09946599B1
公开(公告)日：2018-04-17
申请号：US15136466
申请日：2016-04-22
申请人： Marvell International Ltd.
发明人： Gregory Burd
IPC分类号： G06F11/10 , G06F3/06 , G06F12/0871
CPC分类号： G06F11/1076 , G06F3/0619 , G06F3/0653 , G06F3/0685 , G06F3/0689 , G06F12/0871 , G06F2212/1016 , G06F2212/1032 , G06F2212/60
摘要： Systems and methods described herein provide a method for enhanced data access to a hard disk drive with caching. The method includes obtaining data for storage from a data source. The method further includes applying at least one of a track error-correcting code scheme, a redundant array of independent disks (RAID) encoder, streaming inter-track interference cancellation and a lower power read-data channel to the obtained data. The method further includes configuring a caching system to store a frequently accessed portion of the encoded data, and receiving, from a host computer, a data access request. The method further includes retrieving a data file from the caching system to the host computer in response to the data access request.

3. 发明授权

US09786319B1 Codes and techniques for magnetic recording 有权
公开(公告)号：US09786319B1
公开(公告)日：2017-10-10
申请号：US15453547
申请日：2017-03-08
申请人： Marvell International Ltd.
发明人： Seyed Mehrdad Khatami , Gregory Burd , Byung-Hak Kim
IPC分类号： G11B5/09 , G11B20/14 , G11B5/012 , G11B5/596
CPC分类号： G11B20/1403 , G11B5/012 , G11B5/09 , G11B5/59633 , G11B2020/1484
摘要： This disclosure describes codes and techniques for magnetic recording. The coding schemes decrease bit error rates by decreasing total transitions in the encoded binary data compared to conventional codes. Additionally, instead of relying on a single coding scheme, an encoder and decoder are configured to switch between different coding schemes. By so doing, a variety of the coding schemes allows the encoded binary data to have a smaller bit error rate than a single coding scheme and have a maximum run-length less than or equal to a maximum run-length limitation of a magnetic disk.

4. 发明授权

US09251380B1 Method and storage device for isolating and preventing access to processor and memory used in decryption of text 有权
标题翻译：用于隔离和防止对文本解密中使用的处理器和存储器的访问的方法和存储设备
公开(公告)号：US09251380B1
公开(公告)日：2016-02-02
申请号：US14031653
申请日：2013-09-19
申请人： Marvell International Ltd.
发明人： Siu-Hung Fred Au , Gregory Burd , Wayne C. Datwyler , Leonard J. Galasso , Tze Lei Poo , Minda Zhang
IPC分类号： G06F12/14 , G06F21/78 , G06F21/72 , G06F21/85
CPC分类号： G06F21/78 , G06F21/602 , G06F21/72 , G06F21/85
摘要： A storage drive includes a first memory that stores first text. A first processor generates a first instruction to decrypt the first text. A cryptographic module includes a second memory, a cryptographic device, a memory module, and a second processor. The second memory is inaccessible to the first processor and stores a cryptographic key. The cryptographic device accesses the second memory to obtain the cryptographic key and based on the first instruction, decrypts the first text. The memory module stores a status of execution of the first instruction by the cryptographic device. The second processor, prior to the cryptographic device decrypting the first text, forwards the first instruction to the cryptographic device and stores the status of execution of the first instruction in the memory module. The memory module is connected between the first and second processors and isolates the first processor from the second processor.
摘要翻译：存储驱动器包括存储第一文本的第一存储器。第一处理器产生用于解密第一文本的第一指令。密码模块包括第二存储器，加密设备，存储器模块和第二处理器。第一个处理器无法访问第二个内存，并存储加密密钥。加密设备访问第二存储器以获得加密密钥，并且基于第一指令对第一文本进行解密。存储器模块存储由密码装置执行第一指令的状态。第二处理器在加密装置解密第一文本之前将第一指令转发到加密装置，并将第一指令的执行状态存储在存储器模块中。存储器模块连接在第一和第二处理器之间，并将第一处理器与第二处理器隔离。

5. 发明授权

US09189315B1 Channel quality monitoring and method for qualifying a storage channel using an iterative decoder 有权
标题翻译：信道质量监测和使用迭代解码器对存储信道进行限定的方法
公开(公告)号：US09189315B1
公开(公告)日：2015-11-17
申请号：US14511695
申请日：2014-10-10
申请人： Marvell International Ltd.
发明人： Nedeljko Varnica , Gregory Burd
IPC分类号： H03M13/00 , G06F11/07 , G06F11/34
CPC分类号： G11B27/36 , G06F11/076 , G06F11/3466 , H03M13/1102 , H03M13/2906 , H03M13/2933 , H03M13/2957 , H03M13/3738 , H03M13/612 , H03M13/6331 , H03M13/6343
摘要： Monitors, architectures, systems and methods for determining one or more quality characteristics of a storage channel. The monitor generally includes an iterative decoder configured to decode data from the storage channel and generate information relating to a quality metric of the storage channel and/or the iterative decoder, a memory configured to store a threshold value for the quality metric, and a comparator configured to compare the threshold value with a measured value of the quality metric. The monitor enables accurate determination of storage channel quality without use of conventional Reed-Solomon metrics.
摘要翻译：用于确定存储通道的一个或多个质量特性的监视器，架构，系统和方法。监视器通常包括迭代解码器，其被配置为对来自存储信道的数据进行解码，并产生与存储信道和/或迭代解码器的质量度量相关的信息;被配置为存储用于质量度量的阈值的存储器，以及比较器被配置为将所述阈值与所述质量度量的测量值进行比较。该监视器能够准确地确定存储信道质量，而不使用常规的里德 - 所罗门度量。

6. 发明授权

US09143168B1 Method and system for removing interference caused by servo data from user data 有权
标题翻译：用于从用户数据中消除伺服数据造成的干扰的方法和系统
公开(公告)号：US09143168B1
公开(公告)日：2015-09-22
申请号：US14137671
申请日：2013-12-20
申请人： Marvell International Ltd.
发明人： Zining Wu , Gregory Burd , Nitin Nangare
IPC分类号： G11C29/00 , H03M13/37 , H03M13/00
CPC分类号： H03M13/373 , G11B20/10046 , G11B20/1217 , G11B2020/1282 , G11B2220/2516 , H03M13/00
摘要： Reproduction of encoded data which includes a split-mark. FIR data corresponding to split-mark and FIR data affected by the split-mark due to inter-symbol-interference are identified. FIR data corresponding to the split-mark is removed from the received FIR data. Recovered data is created by removing incorrect inter-symbol-interference from the FIR data due to the split-mark, and adding correct inter-symbol-interference from codeword bits. The recovered data is stitched together with data unaffected by split-mark data.
摘要翻译：包含分割标记的编码数据的再现。识别对应于分割标记的FIR数据和由于符号间干扰而被分割标记影响的FIR数据。对应于分割标记的FIR数据从接收到的FIR数据中去除。通过从分离标记去除来自FIR数据的不正确的符号间干扰，并从码字比特中添加正确的符号间干扰，创建恢复的数据。恢复的数据与不受分割标记数据影响的数据进行缝合。

7. 发明授权

US09098411B1 Methods and apparatus for defect detection and correction via iterative decoding algorithms 有权
标题翻译：用于通过迭代解码算法进行缺陷检测和校正的方法和装置
公开(公告)号：US09098411B1
公开(公告)日：2015-08-04
申请号：US14262300
申请日：2014-04-25
申请人： MARVELL INTERNATIONAL LTD.
发明人： Nedeljko Varnica , Yifei Zhang , Panu Chaichanavong , Gregory Burd
IPC分类号： G06F11/00 , G06F11/07
CPC分类号： G06F11/0763 , G11B20/1833 , G11B2020/185 , H03M13/1111 , H03M13/2957 , H03M13/373 , H03M13/4138 , H03M13/6325 , H03M13/6343
摘要： In iterative decoding, a data recovery scheme corrects for corrupted or defective data by determining reliability metrics for blocks of decoded data. Block or windowed detectors generate block reliability metrics for data blocks (rather than individual bits) of decoded data using soft information from the regular decoding mode or from new iterative decoding iterations performed during error recovery mode. An error recovery system triggers corrective decoding of selected data blocks based on the block reliability metrics, by for example, comparing the block reliability metrics to a threshold or by selecting an adjustable number of the least reliable data blocks.
摘要翻译：在迭代解码中，数据恢复方案通过确定解码数据块的可靠性度量来校正损坏或缺陷数据。块或窗口检测器使用来自常规解码模式的软信息或在错误恢复模式期间执行的新的迭代解码迭代来生成解码数据的数据块（而不是单独位）的块可靠性度量。错误恢复系统通过例如将块可靠性度量与阈值进行比较或通过选择可调节数量的最不可靠的数据块来触发基于块可靠性度量来校正所选数据块的解码。

8. 发明授权

US09025262B1 Systems and methods for asymmetry detection based on a synchronization mark 有权
标题翻译：基于同步标记的不对称检测系统和方法
公开(公告)号：US09025262B1
公开(公告)日：2015-05-05
申请号：US14307136
申请日：2014-06-17
申请人： Marvell International Ltd.
发明人： Heng Tang , Panu Chaichanavong , Gregory Burd , Yu-Yao Chang
IPC分类号： G11B5/02 , G11B27/36 , G11B20/10
CPC分类号： G11B20/10009 , G11B20/10324
摘要： Systems and methods are provided for evaluating an asymmetry metric. A receiver receives a synchronization signal, a filtered signal, and a reference signal. A processor processes the synchronization signal and the reference signal to obtain a peak indicator signal, identifies a first set of values and a second set of values from the filtered signal based at least in part on the peak indicator signal, and evaluates an asymmetry metric from the first set of values and the second set of values.
摘要翻译：提供了用于评估不对称度量的系统和方法。接收机接收同步信号，滤波信号和参考信号。 A处理器处理同步信号和参考信号以获得峰值指示符信号，至少部分地基于峰值指示符信号从滤波的信号识别第一组值和第二组值，并且评估不对称度量第一组值和第二组值。

9. 发明授权

US09019638B1 Systems and methods for performing timing acquisition in a read/write channel module 有权
标题翻译：在读/写通道模块中执行定时采集的系统和方法
公开(公告)号：US09019638B1
公开(公告)日：2015-04-28
申请号：US14461767
申请日：2014-08-18
申请人： Marvell International Ltd.
发明人： Michael Madden , Gregory Burd
IPC分类号： G11B5/02 , G11B5/09 , G11B19/04 , G11B20/10
CPC分类号： G11B20/10046 , G11B5/09 , G11B19/045 , G11B20/10222 , G11B20/1217
摘要： A read/write channel module including a sampling module configured to sample a read signal corresponding to data stored on a disk. A first preamble is encoded with a first timing recovery pattern on a first track of the disk. The first timing recovery pattern includes a first pattern that changes every x bits. A second preamble is encoded with a second timing recovery pattern on a second track of the disk adjacent to the first track. The second timing recovery pattern includes a second pattern that changes every y bits. A data processing module is configured to process the read signal to remove inter track interference from the read signal based on a difference between the first timing recovery pattern and the second timing recovery pattern.
摘要翻译：读/写通道模块，其包括被配置为对与存储在盘上的数据相对应的读信号进行采样的采样模块。在盘的第一轨道上用第一定时恢复模式对第一前同步码进行编码。第一定时恢复模式包括每x位改变的第一模式。在与第一轨道相邻的盘的第二轨道上用第二定时恢复模式对第二前同步码进行编码。第二定时恢复模式包括每y位改变的第二模式。数据处理模块被配置为基于第一定时恢复模式和第二定时恢复模式之间的差异来处理读取信号以从读取信号去除帧间干扰。

10. 发明授权

US08964323B1 System and method for detecting and correcting shift in a DC level of an input signal 有权
标题翻译：用于检测和校正输入信号的直流电平偏移的系统和方法
公开(公告)号：US08964323B1
公开(公告)日：2015-02-24
申请号：US14281111
申请日：2014-05-19
申请人： Marvell International Ltd.
发明人： Heng Tang , Yu-Yao Chang , Panu Chaichanavong , Michael Madden , Gregory Burd
IPC分类号： G11B5/09 , G11B5/02 , G11B20/10
CPC分类号： G11B20/10203 , G11B5/012 , G11B5/09 , G11B20/10018 , G11B20/10046 , G11B20/10268
摘要： A system including a first filter module configured to receive an input signal including (i) a first shift in a DC level of the input signal and (ii) a second shift in the DC level of the input signal. The first shift has (i) a first magnitude and (ii) a first duration. The second shift has (i) a second magnitude and (ii) a second duration. The second magnitude is different than the first magnitude. The second duration is greater than the first duration. The first filter module is configured to pass the first shift. The second filter module is configured to detect one or more of (i) the first shift and (ii) the second shift, and in response to detecting one or more of (i) the first shift and (ii) the second shift, filter one or more of (i) the first shift and (ii) the second shift.
摘要翻译：一种系统，包括被配置为接收输入信号的第一滤波器模块，所述输入信号包括（i）所述输入信号的DC电平中的第一移位和（ii）所述输入信号的DC电平的第二移位。第一班班有（i）第一班，（ii）第一班。第二班班有（i）第二班，（ii）第二班。第二幅度与第一幅度不同。第二个持续时间大于第一个持续时间。第一过滤器模块被配置为通过第一移位。第二滤波器模块被配置为检测（i）第一移位和（ii）第二移位中的一个或多个，并且响应于检测到（i）第一移位和（ii）第二移位中的一个或多个，滤波器一个或多个（i）第一班班和（ii）第二班。

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