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81. 发明申请

US20120033321A1 TAPE LAYOUT DESIGN FOR RELIABLE ECC DECODING 有权
标题翻译：用于可靠的ECC解码的卷带布局设计
公开(公告)号：US20120033321A1
公开(公告)日：2012-02-09
申请号：US12849720
申请日：2010-08-03
申请人： Roy D. Cideciyan , Thomas Mittelholzer , Kenji Ohtani , Paul J. Seger , Keisuke Tanaka
发明人： Roy D. Cideciyan , Thomas Mittelholzer , Kenji Ohtani , Paul J. Seger , Keisuke Tanaka
IPC分类号： G11B5/09 , H03M13/00
CPC分类号： G11B5/00817 , G11B5/09 , G11B20/1201 , G11B20/1866 , G11B2020/1853 , G11B2220/956 , H03M13/2909
摘要： A method for physically laying out data on tape is disclosed herein. In one embodiment, such a method includes receiving a data set, wherein the data set includes S sub data sets (SDSs) of fixed size and each SDS includes N codeword interleaves (CWIs). The method further distributes the CWIs for the S SDSs across T tracks on a physical tape medium such that the distances between CWIs of the same SDS are substantially maximized on the physical tape medium. To maximize the distances, the method periodically rotates the tracks within the data set by a track rotation value R, wherein the number of tracks T is equal to 2k, and the track rotation value R is equal to 2k−1−1. A corresponding apparatus is also disclosed herein.
摘要翻译：本文公开了一种在带上物理布置数据的方法。在一个实施例中，这种方法包括接收数据集，其中数据集包括固定大小的S个子数据集（SDS），并且每个SDS包括N个码字交织（CWI）。该方法进一步在物理磁带介质上跨T磁道分配用于S SDS的CWI，使得相同SDS上的CWI之间的距离在物理磁带介质上基本上最大化。为了最大化距离，该方法通过轨道旋转值R周期性地旋转数据集内的轨道，其中轨道数量T等于2k，轨道旋转值R等于2k-1-1。本文还公开了相应的装置。

82. 发明申请

US20100328803A1 COMBINING INFORMATION FROM PARALLEL SERVO CHANNELS 失效
标题翻译：从并行伺服通道组合信息
公开(公告)号：US20100328803A1
公开(公告)日：2010-12-30
申请号：US12878704
申请日：2010-09-09
申请人： Nhan Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
IPC分类号： G11B5/09
CPC分类号： G11B5/584
摘要： A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module comprises two synchronous servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have outputs for an unweighted parameter estimate and for a measure of the channel reliability. A weight computation module provides first and second weight signals using the measures of channel reliability from the servo channels. An offset computation module provides first and second offset terms which are summed with the unweighted parameter estimates. Multiplying nodes receive the unweighted parameter estimates and the weight signals and outputs offset weighted parameter estimates. A summing node receives the offset weighted parameter estimates and outputs a combined offset weighted parameter estimate to a servomechanism.
摘要翻译：加权组合方案利用来自并行操作的两个伺服通道的信息。基于定时的伺服模块包括分别耦合的两个同步伺服通道，以接收从数据磁带读取的两个数字伺服信号。两个通道具有未加权参数估计的输出和通道可靠性的度量。权重计算模块使用来自伺服信道的信道可靠性的测量来提供第一和第二加权信号。偏移计算模块提供与未加权参数估计相加的第一和第二偏移项。乘法节点接收未加权的参数估计和权重信号并输出偏移加权参数估计。求和节点接收偏移加权参数估计，并将组合的偏移加权参数估计输出到伺服机构。

83. 发明申请

US20100302666A1 DETECTING A PERIODIC SEQUENCE OF SERVO SIGNALS 失效
标题翻译：检测伺服信号的周期性序列
公开(公告)号：US20100302666A1
公开(公告)日：2010-12-02
申请号：US12815234
申请日：2010-06-14
申请人： Nhan X. Bui , Roy D. Cideciyan , Robert A. Hutchins , Thomas Mittelholzer , Kazuhiro Tsuruta
发明人： Nhan X. Bui , Roy D. Cideciyan , Robert A. Hutchins , Thomas Mittelholzer , Kazuhiro Tsuruta
IPC分类号： G11B27/36
CPC分类号： G11B20/1407 , G11B5/584 , G11B20/1492 , G11B2020/1284 , G11B2020/1484 , G11B2220/90
摘要： A system and method are disclosed for detecting a periodic sequence. A value detector module detects a plurality of values of a periodic sequence. In one embodiment, a transformation module transforms the plurality of values into transformed values. A confinement module confines the values to a limited set of confined values. A correlation module correlates the confined values with a plurality of instances of the periodic sequence. In addition, a selection module selects an instance of the periodic sequence with the highest correlation to the confined values as an observed periodic sequence.
摘要翻译：公开了用于检测周期性序列的系统和方法。值检测器模块检测周期性序列的多个值。在一个实施例中，变换模块将多个值转换为变换值。限制模块将值限制为有限的一组限制值。相关模块将约束值与周期性序列的多个实例相关联。此外，选择模块选择具有与限定值的最高相关性的周期性序列的实例作为观察到的周期性序列。

84. 发明授权

US07839599B2 Combining information from parallel servo channels 失效
标题翻译：组合来自并行伺服通道的信息
公开(公告)号：US07839599B2
公开(公告)日：2010-11-23
申请号：US12400420
申请日：2009-03-09
申请人： Nhan X. Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan X. Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
IPC分类号： G11B5/584 , G11B21/02
CPC分类号： G11B5/584
摘要： A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module comprises two synchronous servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have outputs for an unweighted parameter estimate and for a measure of the channel reliability. A weight computation module provides first and second weight signals using the measures of channel reliability from the servo channels. An offset computation module provides first and second offset terms which are summed with the unweighted parameter estimates. Multiplying nodes receive the unweighted parameter estimates and the weight signals and outputs offset weighted parameter estimates. A summing node receives the offset weighted parameter estimates and outputs a combined offset weighted parameter estimate to a servomechanism.
摘要翻译：加权组合方案利用来自并行运行的两个伺服通道的信息。基于定时的伺服模块包括分别耦合的两个同步伺服通道，以接收从数据磁带读取的两个数字伺服信号。两个通道具有未加权参数估计的输出和通道可靠性的度量。权重计算模块使用来自伺服信道的信道可靠性的测量来提供第一和第二加权信号。偏移计算模块提供与未加权参数估计相加的第一和第二偏移项。乘法节点接收未加权的参数估计和权重信号并输出偏移加权参数估计。求和节点接收偏移加权参数估计，并将组合的偏移加权参数估计输出到伺服机构。

85. 发明申请

US20100177420A1 REWRITING CODEWORD OBJECTS TO MAGNETIC DATA TAPE UPON DETECTION OF AN ERROR 有权
标题翻译：在检测到错误的情况下，将编码对象写入磁性数据带
公开(公告)号：US20100177420A1
公开(公告)日：2010-07-15
申请号：US12351756
申请日：2009-01-09
申请人： Roy D. Cideciyan , Thomas Mittelholzer , Paul J. Seger , Keisuke Tanaka
发明人： Roy D. Cideciyan , Thomas Mittelholzer , Paul J. Seger , Keisuke Tanaka
IPC分类号： G11B5/09
CPC分类号： G11B20/1883 , G11B20/1833 , G11B20/1879 , G11B2020/183 , G11B2020/1836 , G11B2220/90
摘要： During a read-after-write operation on magnetic tape, a first SCO is formed which includes two encoded processed user data units and is one of T SCOs in a first SCO set. The user data units are each one of T user data units in first and second user data unit sets, respectively, within the first SCO set. The first SCO set is written to the magnetic tape and is immediately read. When an error is detected in one of the user data units, a second SCO is formed to include the first user data unit and, only if an error is not detected in a user data unit in the other user data unit set, to not include the other user data unit, the second SCO being one of T SCOs in a second SCO set. Then, the second SCO set is rewritten to a later position on the tape later.
摘要翻译：在磁带读写操作期间，形成第一SCO，其包括两个经编码的处理的用户数据单元，并且是第一SCO组中的T SCO之一。用户数据单元分别在第一SCO集合内的第一和第二用户数据单元组中的T个用户数据单元中的每一个。第一个SCO组写入磁带并立即读取。当在用户数据单元之一中检测到错误时，形成第二SCO以包括第一用户数据单元，并且仅当在另一个用户数据单元组中的用户数据单元中没有检测到错误时，不包括另一用户数据单元，第二SCO是第二SCO组中的T SCO之一。然后，第二个SCO组被重新写入磁带的稍后位置。

86. 发明授权

US07432834B1 RLL encoding for LTO-5 tape 有权
标题翻译： LTO-5磁带的RLL编码
公开(公告)号：US07432834B1
公开(公告)日：2008-10-07
申请号：US11773821
申请日：2007-07-05
申请人： Roy D. Cideciyan , Paul J. Seger , Keisuke Tanaka
发明人： Roy D. Cideciyan , Paul J. Seger , Keisuke Tanaka
IPC分类号： H03M7/00
CPC分类号： H03M5/145 , G11B20/1426 , G11B2220/90
摘要： Method and apparatus are provided for encoding and decoding rate-(s(K+1)/s(K+1)+1) TCMTR(j,k,t,a) codes, where s is the ECC symbol size in bits and K is the number of unencoded symbols that are interleaved with an (s+1)-bit encoded block at the output of a rate-s/(s+1) encoder that encodes the r-th s-bit symbol. K=m/s−1 where m=s(K+1) is the total number of bits to be encoded. Error propagation is reduced, thus allowing the ECC code to correct errors efficiently. Header error-rate is also reduced by eliminating occurrence of likely error events at the detector output. Although initially an RLL code may be designed for an ECC symbol size of s bits, the RLL encoding of the present invention may be used in conjunction with ECC schemes that utilize symbol sizes other than s bits.
摘要翻译：提供了编码和解码速率（s（K + 1）/ s（K + 1）+1）TCMTR（j，k，t，a）码的方法和装置，其中s是以比特为单位的ECC符号大小， K是在编码第r个s位符号的速率s /（s + 1）编码器的输出处与第（s + 1）位编码块交织的未编码符号的数量。 K = m / s-1其中m = s（K + 1）是要编码的总位数。错误传播减少，从而允许ECC代码有效地纠正错误。也可以通过消除检测器输出处可能发生的错误事件来减少报头错误率。虽然最初可以设计用于s比特的ECC符号大小的RLL代码，但是本发明的RLL编码可以与利用除了s比特之外的符号大小的ECC方案一起使用。

87. 发明申请

US20130326305A1 DATA FORMAT USING AN EFFICIENT REVERSE CONCATENATED MODULATION CODE FOR MAGNETIC TAPE RECORDING 有权
标题翻译：使用有效的反向调整码进行磁带记录的数据格式
公开(公告)号：US20130326305A1
公开(公告)日：2013-12-05
申请号：US13483004
申请日：2012-05-29
申请人： Roy D. Cideciyan , Robert A. Hutchins , Thomas Mittelholzer , Sedat Oelcer
发明人： Roy D. Cideciyan , Robert A. Hutchins , Thomas Mittelholzer , Sedat Oelcer
IPC分类号： H03M13/00
CPC分类号： G11B5/00813 , G11B20/1833 , G11B2020/1836 , G11B2020/185 , G11B2020/1853 , G11B2220/90 , H03M5/145 , H03M13/1102 , H03M13/13 , H03M13/1515 , H03M13/2906
摘要： In one embodiment, a tape drive system includes a write channel for writing data to a magnetic tape, the write channel utilizing a rate-(232/234) reverse concatenated modulation code. The write channel includes logic adapted for receiving a data stream comprising one or more data sets, logic adapted for separating each data set into a plurality of sub data sets, logic adapted for encoding each sub data set with a C2 encoding, logic adapted for encoding each C2-encoded sub data set with a modulation code, logic adapted for encoding each modulated sub data set with a C1 encoding, and logic adapted for simultaneously writing the encoded modulated sub data sets to data tracks of the magnetic tape. Other systems for writing data to a magnetic tape utilizing a rate-(232/234) reverse concatenated modulation code are described according to various other embodiments.
摘要翻译：在一个实施例中，磁带驱动器系统包括用于将数据写入磁带的写入通道，该写入通道利用速率（232/234）反向级联调制码。写通道包括适于接收包括一个或多个数据组的数据流的逻辑，适用于将每个数据集分成多个子数据集的逻辑，适用于使用C2编码对每个子数据集进行编码的逻辑，适用于编码的逻辑具有调制码的每个C2编码的子数据集，适用于用C1编码对每个经调制的子数据集进行编码的逻辑，以及用于将编码的已调制子数据集同时写入到磁带的数据轨道的逻辑。根据各种其他实施例，描述使用速率（232/234）反向级联调制码将数据写入磁带的其它系统。

88. 发明申请

US20120307393A1 TRACK-DEPENDENT DATA RANDOMIZATION MITIGATING FALSE VFO DETECTION 有权
标题翻译：跟踪依赖的数据随机化，减轻虚拟VFO检测
公开(公告)号：US20120307393A1
公开(公告)日：2012-12-06
申请号：US13149905
申请日：2011-06-01
申请人： Roy D. Cideciyan , Thomas Mittelholzer , Paul J. Seger , Keisuke Tanaka
发明人： Roy D. Cideciyan , Thomas Mittelholzer , Paul J. Seger , Keisuke Tanaka
IPC分类号： G11B5/09
CPC分类号： G11B5/0083 , G11B5/09 , G11B20/10009 , G11B20/10222 , G11B20/10259 , G11B20/1833 , G11B2220/956 , H03M13/09 , H03M13/27 , H03M13/2909 , H03M13/2945 , H03M13/6561 , H04L1/0042
摘要： A method for randomizing data to mitigate false VFO detection is described. In one embodiment, such a method includes simultaneously receiving multiple input data streams. Each input data stream is associated with a different track on a magnetic tape medium. The input data streams are simultaneously scrambled to produce multiple randomized data streams. The input data streams are scrambled such that different bit patterns are produced in the randomized data streams even where corresponding bit patterns in the input data streams are identical. The randomized data streams are simultaneously written to their associated data tracks on the magnetic tape medium. A corresponding apparatus is also described.
摘要翻译：描述用于随机化数据以减轻虚假VFO检测的方法。在一个实施例中，这种方法包括同时接收多个输入数据流。每个输入数据流与磁带介质上的不同轨道相关联。输入数据流被同时加扰以产生多个随机数据流。输入数据流被加扰，使得在随机数据流中产生不同的位模式，即使输入数据流中相应的位模式是相同的。随机数据流被同时写入到磁带介质上的相关联的数据轨道上。还描述了相应的装置。

89. 发明申请

US20120210194A1 INTEGRATED DATA AND HEADER PROTECTION FOR TAPE DRIVES 有权
标题翻译：集成数据和磁带保护用于磁带驱动
公开(公告)号：US20120210194A1
公开(公告)日：2012-08-16
申请号：US13451233
申请日：2012-04-19
申请人： Roy D. Cideciyan , Hisato Matsuo , Thomas Mittelholzer , Kenji Ohtani , Paul J. Seger , Keisuke Tanaka
发明人： Roy D. Cideciyan , Hisato Matsuo , Thomas Mittelholzer , Kenji Ohtani , Paul J. Seger , Keisuke Tanaka
IPC分类号： H03M13/05 , G06F11/10
CPC分类号： G11B20/18 , G11B2020/184 , G11B2020/1853 , G11B2220/90
摘要： A method for integrating data and header protection in tape drives includes receiving an array of data organized into rows and columns. The array is extended to include one or more headers for each row of data in the array. The method provides two dimensions of error correction code (ECC) protection for the data in the array and a single dimension of ECC protection for the headers in the array. A corresponding apparatus is also disclosed herein.
摘要翻译：在磁带驱动器中集成数据和头部保护的方法包括接收一组数据组织成行和列。该数组被扩展以包括数组中每行数据的一个或多个头。该方法为阵列中的数据提供了二维纠错码（ECC）保护，并为阵列中的标头提供了ECC保护的一个维度。本文还公开了相应的装置。

90. 发明申请

US20100226037A1 COMBINING INFORMATION FROM PARALLEL SERVO CHANNELS 失效
标题翻译：从并行伺服通道组合信息
公开(公告)号：US20100226037A1
公开(公告)日：2010-09-09
申请号：US12400369
申请日：2009-03-09
申请人： Nhan Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
IPC分类号： G11B5/596 , G11B5/584
CPC分类号： G11B5/584
摘要： A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module servo module comprises two servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have outputs for an unweighted metric and for a measure of the channel reliability. A weight computation module provides first and second weight signals using the measures of channel reliability from the servo channels. A first multiplying node receives a first unweighted metric and a first weight signal and is operable to output a first weighted metric. A second multiplying node receives a second unweighted metric and a second weight signal and outputs a second weighted metric. A summing node receives the first and second weighted metrics and outputs a combined weighted metric to an LPOS word decoder.
摘要翻译：加权组合方案利用来自并行操作的两个伺服通道的信息。基于定时的伺服模块伺服模块包括分别耦合的两个伺服通道，以接收从数据磁带读取的两个数字伺服信号。两个通道都具有未加权度量的输出和通道可靠性的度量。权重计算模块使用来自伺服信道的信道可靠性的测量来提供第一和第二加权信号。第一乘法节点接收第一未加权度量和第一加权信号，并且可操作以输出第一加权度量。第二乘法节点接收第二未加权度量和第二加权信号并输出第二加权度量。求和节点接收第一和第二加权度量，并将组合加权度量输出到LPOS字解码器。

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