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1. 发明授权

US10198316B2 Systems and methods for efficient flash memory access 有权
公开(公告)号：US10198316B2
公开(公告)日：2019-02-05
申请号：US14925688
申请日：2015-10-28
申请人： Avago Technologies International Sales Pte. Limited
发明人： Razmik Karabed , Zhijun Zhao , Shaohua Yang
IPC分类号： G06F11/10 , H03M13/11 , G11C29/52 , H03M7/00 , H03M13/00
摘要： Embodiments are related to systems and methods for data storage, and more particularly to systems and methods for storing and accessing data from a flash memory.

2. 发明授权

US09425823B1 State-split based encoder and decoder with table compression 有权
标题翻译：基于状态分割的编码器和解码器与表压缩
公开(公告)号：US09425823B1
公开(公告)日：2016-08-23
申请号：US14666133
申请日：2015-03-23
申请人： Avago Technologies General IP (Singapore) Pte. Ltd.
发明人： Razmik Karabed , Ebad Ahmed , Victor Krachkovsky , Shaohua Yang , Hakan C. Ozdemir , Zhiwei Wu
IPC分类号： G11B5/09 , H03M7/42 , H03M7/46 , G11B20/00
CPC分类号： H03M7/42 , G11B20/00007 , H03M5/145 , H03M7/46
摘要： A data encoder includes an encoding logic circuit configured to encode input data to apply run length limiting using state splitting of a code trellis, and a lookup table configured to apply a block-enumerable map on an un-split version of the code trellis, wherein entries in the lookup table are compressed.
摘要翻译：数据编码器包括编码逻辑电路，其被配置为对输入数据进行编码，以使用代码网格的状态分割来应用运行长度限制;以及查找表，其被配置为在块分割版本的代码网格上应用块可枚举映射，其中查找表中的条目被压缩。

3. 发明申请

US20150380050A1 Multi-Level Enumerative Encoder And Decoder 有权
标题翻译：多级枚举编码器和解码器
公开(公告)号：US20150380050A1
公开(公告)日：2015-12-31
申请号：US14318665
申请日：2014-06-29
申请人： LSI Corporation
发明人： Victor Krachkovsky , Razmik Karabed , Shaohua Yang , Wu Chang
IPC分类号： G11B20/12
CPC分类号： G11B20/1217 , G11B20/1833 , H03M7/4006 , H03M13/1102
摘要： A storage system includes a storage medium operable to maintain a data set, a read/write head assembly operable to write the data set to the storage medium and to read the data set from the storage medium, a multi-level enumerative encoder operable to encode the data set before it is written to the storage medium as encoded data, wherein the enumerative encoder applies an enumeration using a plurality of level-dependent bases, and a decoder operable to decode the data set after it is read from the storage medium.
摘要翻译：存储系统包括可操作以保持数据集的存储介质，可操作以将数据集写入存储介质并从存储介质读取数据集的读/写头组件，可操作以编码的多级枚举编码器其前的数据集作为编码数据被写入存储介质，其中该枚举编码器使用多个依赖于水平的基站来应用枚举，以及解码器，用于在从存储介质读取数据集之后对其进行解码。

4. 发明授权

US09003263B2 Encoder and decoder generation by state-splitting of directed graph 有权
标题翻译：通过有向图的状态分割生成编码器和解码器
公开(公告)号：US09003263B2
公开(公告)日：2015-04-07
申请号：US13742340
申请日：2013-01-15
申请人： LSI Corporation
发明人： Razmik Karabed , Shaohua Yang , Wu Chang , Victor Krachkovsky
IPC分类号： G11C29/00 , G06F11/14 , G11C11/56 , G11C11/26
CPC分类号： G06F11/14 , G11B20/1833 , G11C11/26 , G11C11/5628 , G11C11/5642 , H03M5/145
摘要： A method of generating a hardware encoder includes generating a first directed graph characterizing a constraint set for a constrained system, identifying a scaling factor for an approximate eigenvector for the first directed graph, applying the scaling factor to the approximate eigenvector for the first directed graph to yield a scaled approximate eigenvector, partitioning arcs between each pair of states in the first directed graph, performing a state splitting operation on the first directed graph according to the partitioning of the arcs to yield a second directed graph, and generating the hardware encoder based on the second directed graph.
摘要翻译：生成硬件编码器的方法包括：生成表征约束系统的约束集的第一有向图，识别第一有向图的近似特征向量的缩放因子，将缩放因子应用于第一有向图的近似特征向量产生缩放的近似特征向量，在第一有向图中的每对状态之间划分弧，根据弧的划分对第一有向图执行状态分割操作以产生第二有向图，并且基于第二个有向图。

5. 发明授权

US08724243B1 Systems and methods for run length limited encoding 有权
标题翻译：运行长度限制编码的系统和方法
公开(公告)号：US08724243B1
公开(公告)日：2014-05-13
申请号：US13707898
申请日：2012-12-07
申请人： LSI Corporation
发明人： Razmik Karabed , Shaohua Yang , Wu Chang , Victor A. Krachkovsky
IPC分类号： G11B20/14 , H03M7/00
CPC分类号： G11B20/1426 , H03M7/46
摘要： Systems and methods relating generally to processing information, and more particularly without limitation to systems and methods for encoding data sets.
摘要翻译：一般涉及处理信息的系统和方法，更具体而言，不限于用于编码数据集的系统和方法。

6. 发明授权

US08413023B2 Error-locator-polynomial generation with erasure support 有权
标题翻译：错误定位 - 多项式生成与擦除支持
公开(公告)号：US08413023B2
公开(公告)日：2013-04-02
申请号：US12651392
申请日：2009-12-31
申请人： Vincent Brendan Ashe , Hakan C. Ozdemir , Razmik Karabed , Richard Barndt
发明人： Vincent Brendan Ashe , Hakan C. Ozdemir , Razmik Karabed , Richard Barndt
IPC分类号： G06F11/00
CPC分类号： H03M13/154 , G11B20/1833 , G11B2020/1836 , G11B2220/2516 , H03M13/152 , H03M13/153 , H03M13/1545 , H03M13/41 , H03M13/455 , H03M13/6343
摘要： A system and method for correcting errors in an ECC block using erasure-identification data when generating an error-locator polynomial. In an embodiment, a ECC decoding method, uses “erasure” data indicative of bits of data that are unable to be deciphered by a decoder. Such a method may use an Berlekamp-Massey algorithm that receives two polynomials as inputs; a first polynomial indicative of erasure location in the stream of bits and a syndrome polynomial indicative of all bits as initially determined. The Berlekamp-Massey algorithm may use the erasure identification information to more easily decipher the overall codeword when faced with a error-filled codeword.
摘要翻译：一种用于在生成错误定位多项式时使用擦除识别数据来校正ECC块中的错误的系统和方法。在一个实施例中，ECC解码方法使用指示不能被解码器解密的数据位的擦除数据。这种方法可以使用接收两个多项式作为输入的Berlekamp-Massey算法; 指示比特流中的擦除位置的第一多项式和指示最初确定的所有比特的校正子多项式。 Berlekamp-Massey算法可以使用擦除识别信息在面对错误填充码字时更容易地破译整个码字。

7. 发明授权

US07743314B2 Method and apparatus for a data-dependent noise predictive viterbi 有权
标题翻译：用于数据相关噪声预测维特比的方法和装置
公开(公告)号：US07743314B2
公开(公告)日：2010-06-22
申请号：US11607492
申请日：2006-12-01
申请人： Heinrich J. Stockmanns , William G. Bliss , Razmik Karabed , James W. Rae
发明人： Heinrich J. Stockmanns , William G. Bliss , Razmik Karabed , James W. Rae
IPC分类号： H03M13/03
CPC分类号： G11B20/10296 , G11B20/10009
摘要： An improved Viterbi detector is disclosed in which each branch metric is calculated based on noise statistics that depend on the signal hypothesis corresponding to the branch. Also disclosed is a method of reducing the complexity of the branch metric calculations by clustering branches corresponding to signals with similar signal-dependent noise statistics. A feature of this architecture is that the branch metrics (and their corresponding square difference operators) are clustered into multiple groups, where all the members of each group draw input from a single, shared noise predictive filter corresponding to the group. In recording technologies as practiced today, physical imperfections in the representation of recorded user data in the recording medium itself are becoming the dominate source of noise in the read back data. This noise is highly dependent on what was (intended to be) written in the medium. The disclosed Viterbi detector exploits this statistical dependence of the noise on the signal.
摘要翻译：公开了一种改进的维特比检测器，其中基于依赖于与分支对应的信号假设的噪声统计来计算每个分支度量。还公开了一种通过对与具有相似的信号相关噪声统计信号的信号进行聚类的分支来降低分支度量计算的复杂度的方法。该架构的一个特点是分支度量（及其对应的平方差运算符）被聚集成多个组，其中每个组的所有成员从与组相对应的单个共享噪声预测滤波器中绘制输入。在今天所采用的记录技术中，在记录介质本身中记录的用户数据的表示中的物理缺陷正在回读数据中成为主要的噪声源。这种噪音很大程度上取决于介质中写的内容。所公开的维特比检测器利用噪声对信号的统计依赖性。

8. 发明申请

US20070076826A1 Method and apparatus for a data-dependent noise predictive viterbi 有权
标题翻译：用于数据相关噪声预测维特比的方法和装置
公开(公告)号：US20070076826A1
公开(公告)日：2007-04-05
申请号：US11607492
申请日：2006-12-01
申请人： Heinrich Stockmanns , William Bliss , Razmik Karabed , James Rae
发明人： Heinrich Stockmanns , William Bliss , Razmik Karabed , James Rae
IPC分类号： H03D1/00
CPC分类号： G11B20/10296 , G11B20/10009
摘要： An improved Viterbi detector is disclosed in which each branch metric is calculated based on noise statistics that depend on the signal hypothesis corresponding to the branch. Also disclosed is a method of reducing the complexity of the branch metric calculations by clustering branches corresponding to signals with similar signal-dependent noise statistics. A feature of this architecture is that the branch metrics (and their corresponding square difference operators) are clustered into multiple groups, where all the members of each group draw input from a single, shared noise predictive filter corresponding to the group. In recording technologies as practiced today, physical imperfections in the representation of recorded user data in the recording medium itself are becoming the dominate source of noise in the read back data. This noise is highly dependent on what was (intended to be) written in the medium. The disclosed Viterbi detector exploits this statistical dependence of the noise on the signal.
摘要翻译：公开了一种改进的维特比检测器，其中基于依赖于与分支对应的信号假设的噪声统计来计算每个分支度量。还公开了一种通过对与具有相似的信号相关噪声统计信号的信号进行聚类的分支来降低分支度量计算的复杂度的方法。该架构的一个特点是分支度量（及其对应的平方差运算符）被聚集成多个组，其中每个组的所有成员从与组相对应的单个共享噪声预测滤波器中绘制输入。在今天所采用的记录技术中，在记录介质本身中记录的用户数据的表示中的物理缺陷正在回读数据中成为主要的噪声源。这种噪音很大程度上取决于介质中写的内容。所公开的维特比检测器利用噪声对信号的统计依赖性。

9. 发明申请

US20060164265A1 High rate coding for media noise 有权
公开(公告)号：US20060164265A1
公开(公告)日：2006-07-27
申请号：US11359453
申请日：2006-04-06
申请人： William Bliss , Andrei Vityaev , Razmik Karabed
发明人： William Bliss , Andrei Vityaev , Razmik Karabed
IPC分类号： H03M7/00
CPC分类号： G11B20/1426 , G11B20/10009 , G11B20/1833 , G11B2020/1446 , H03M5/145 , H03M13/093
摘要： An apparatus has a conversion circuit, a precoder circuit, and a selection circuit. The conversion circuit converts user data b1, b2, b3 . . . bk to a coded sequence c0, c1, c2 . . . cq. The selection circuit selects c0 in the coded sequence c0, c1, c2 . . . cq such that the output of the precoder circuit has less than a maximum number q of transitions. The conversion circuit may include an encoder circuit to convert user data b1, b2, b3 . . . bk to a sequence c1, c2 . . . cq, and a transition minimization circuit to add c0 to the sequence c1, c2 . . . cq. The apparatus may have a circuit to add at least one additional bit, which may be a parity bit, to the coded sequence c0, c1, c2 . . . cq.

10. 发明授权

US06788223B2 High rate coding for media noise 有权
标题翻译：高速编码媒体噪声
公开(公告)号：US06788223B2
公开(公告)日：2004-09-07
申请号：US10253911
申请日：2002-09-25
申请人： William G. Bliss , Andrei Vityaev , Razmik Karabed
发明人： William G. Bliss , Andrei Vityaev , Razmik Karabed
IPC分类号： H03M700
CPC分类号： G11B20/1426 , G11B20/10009 , G11B20/1833 , G11B2020/1446 , H03M5/145 , H03M13/093
摘要： An apparatus has a conversion circuit, a precoder circuit, and a selection circuit. The conversion circuit converts user data b1, b2, b3 . . . bk to a coded sequence c0, c1, c2 . . . cq. The selection circuit selects c0 in the coded sequence c0, c1, c2 . . . cq such that the output of the precoder circuit has less than a maximum number q of transitions. The conversion circuit may include an encoder circuit to convert user data b1, b2, b3 . . . bk to a sequence c1, c2 . . . cq, and a transition minimization circuit to add c0 to the sequence c1, c2 . . . cq. The apparatus may have a circuit to add at least one additional bit, which may be a parity bit, to the coded sequence c0, c1, c2 . . . cq.
摘要翻译：一种装置具有转换电路，预编码器电路和选择电路。转换电路转换用户数据b1，b2，b3。。。 bk到编码序列c0，c1，c2。。。 cq。选择电路以编码序列c0，c1，c2选择c0。。。 cq，使得预编码器电路的输出具有小于转换的最大数量q。转换电路可以包括用于转换用户数据b1，b2，b3的编码器电路。。。 bk到序列c1，c2。。。 cq，以及将c0加到序列c1，c2的转移最小化电路。。。 cq。该装置可以具有向编码序列c0，c1，c2添加至少一个附加位（可以是奇偶校验位）的电路。。。 cq。

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