专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20080055125A1 DATA STORAGE SYSTEMS 有权
标题翻译：数据存储系统
公开(公告)号：US20080055125A1
公开(公告)日：2008-03-06
申请号：US11833274
申请日：2007-08-03
申请人： Roy CIDECIYAN , Ajay DHOLAKIA , Evangelos ELEFTHERIOU , Richard GALBRAITH , Weldon HANSON , Thomas MITTELHOLZER , Travis OENNING
发明人： Roy CIDECIYAN , Ajay DHOLAKIA , Evangelos ELEFTHERIOU , Richard GALBRAITH , Weldon HANSON , Thomas MITTELHOLZER , Travis OENNING
IPC分类号： H03M13/00
CPC分类号： H03M5/145 , G11B20/1833 , G11B2020/1836 , H03M13/15 , H03M13/1515 , H03M13/27 , H03M13/6343
摘要： A data storage system includes an encoder subsystem comprising an error correction code encoder, a modulation encoder, and a precoder, and a decoder subsystem similarly comprising a detector, an inverse precoder, a channel decoder, and an error correction code decoder. The error correction encoder applies an error correction code to the incoming user bit stream, and the modulation encoder applies so-called modulation or constrained coding to the error correction coded bit stream. The precoder applies so-called preceding to the modulation encoded bit stream. However, this preceding is applied to selected portions of the bit stream only. There can also be a permutation step where the bit sequence is permuted after the modulation encoder before preceding is applied by the precoder. The decoder subsystem operates in the inverse manner.
摘要翻译：数据存储系统包括编码器子系统，包括纠错码编码器，调制编码器和预编码器，以及类似地包括检测器，逆预编码器，信道解码器和纠错码解码器的解码器子系统。误差校正编码器对输入用户比特流应用纠错码，并且调制编码器将所谓的调制或约束编码应用于纠错编码比特流。预编码器将所谓的前面应用于调制编码比特流。然而，上述内容仅适用于位流的选定部分。还可以存在一个置换步骤，其中比特序列在调制编码器之前被预编码器施加之前被置换。解码器子系统以相反的方式运行。

2. 发明申请

US20050249106A1 Data recording medium with servo pattern having pseudo-noise sequences 失效
标题翻译：具有伪噪声序列的伺服图案的数据记录介质
公开(公告)号：US20050249106A1
公开(公告)日：2005-11-10
申请号：US10840819
申请日：2004-05-06
申请人： Jonathan Coker , David Flynn , Richard Galbraith
发明人： Jonathan Coker , David Flynn , Richard Galbraith
IPC分类号： G11B5/596 , G11B7/00 , G11B7/0065
CPC分类号： G11B5/59633 , G11B5/59688
摘要： A data recording medium has tracks with pseudo-noise (PN) sequences with good autocorrelation properties as servo information for controlling the position of the recording head. A first set of alternating tracks uses a leading pseudo-random binary sequence (PRBS), which is a PN sequence with good autocorrelation properties, and a following PRBS that is cyclically shifted from the leading PRBS. A second set of alternating tracks interleaved with the first set also has a leading PRBS and a following PRBS that is cyclically shifted from the leading PRBS, but the leading PRBS in each of the tracks in the second set is offset along-the-track from the leading PRBS in the tracks of the first set. The head positioning control system uses the leading PRBS to generate a servo timing mark (STM), the cyclic shift to generate track identification (TID), and the following PRBS from adjacent tracks to generate the head position error signal (PES).
摘要翻译：数据记录介质具有具有良好自相关特性的伪噪声（PN）序列的轨迹，作为用于控制记录头位置的伺服信息。第一组交替轨道使用前导伪随机二进制序列（PRBS），其是具有良好自相关特性的PN序列，以及从前导PRBS循环移位的以下PRBS。与第一组交织的第二组交替轨迹还具有前导PRBS和从前导PRBS循环移位的后续PRBS，但是第二组中的每个轨道中的前导PRBS沿着轨迹偏移领先的PRBS在第一集的轨道。头部定位控制系统使用前导PRBS来产生伺服定时标记（STM），循环移位以产生轨迹识别（TID），以及来自相邻轨道的后续PRBS以产生头部位置误差信号（PES）。

3. 发明申请

US20050138518A1 Data storage systems 有权
标题翻译：数据存储系统
公开(公告)号：US20050138518A1
公开(公告)日：2005-06-23
申请号：US10739966
申请日：2003-12-18
申请人： Roy Cideciyan , Ajay Dholakia , Evangelos Eleftheriou , Richard Galbraith , Weldon Hanson , Thomas Mittelholzer , Travis Oenning
发明人： Roy Cideciyan , Ajay Dholakia , Evangelos Eleftheriou , Richard Galbraith , Weldon Hanson , Thomas Mittelholzer , Travis Oenning
IPC分类号： G11B20/10 , G11B20/14 , G11B20/18 , H03M13/00
CPC分类号： G11B20/1833
摘要： A data storage system includes an encoder subsystem comprising an error correction code encoder, a modulation encoder, and a precoder, and a decoder subsystem similarly comprising a detector, an inverse precoder, a channel decoder, and an error correction code decoder. The error correction encoder applies an error correction code to the incoming user bit stream, and the modulation encoder applies so-called modulation or constrained coding to the error correction coded bit stream. The precoder applies so-called precoding to the modulation encoded bit stream. However, this precoding is applied to selected portions of the bit stream only. There can also be a permutation step where the bit sequence is permuted after the modulation encoder before precoding is applied by the precoder. The decoder subsystem operates in the inverse manner.
摘要翻译：数据存储系统包括编码器子系统，包括纠错码编码器，调制编码器和预编码器，以及类似地包括检测器，逆预编码器，信道解码器和纠错码解码器的解码器子系统。误差校正编码器对输入用户比特流应用纠错码，并且调制编码器将所谓的调制或约束编码应用于纠错编码比特流。预编码器将所谓的预编码应用于调制编码比特流。然而，该预编码仅应用于位流的选定部分。还可以存在一个置换步骤，其中在由预编码器施加预编码之前，该位序列在调制编码器之后被置换。解码器子系统以相反的方式运行。

4. 发明申请

US20050078394A1 Apparatus for providing data dependent detection in a data read channel 失效
标题翻译：用于在数据读取通道中提供数据相关检测的装置
公开(公告)号：US20050078394A1
公开(公告)日：2005-04-14
申请号：US10683646
申请日：2003-10-10
申请人： Roy Cideciyan , Ajay Dholakia , Evangelos Eleftheriou , Richard Galbraith , Thomas Mittelholzer , Travis Oenning
发明人： Roy Cideciyan , Ajay Dholakia , Evangelos Eleftheriou , Richard Galbraith , Thomas Mittelholzer , Travis Oenning
IPC分类号： G11B5/09 , G11B20/10 , G11B20/24
CPC分类号： G11B20/10296 , G11B20/10009 , G11B20/24
摘要： An apparatus for providing data dependent detection in a data read channel is disclosed. Parameters in a read channel are dynamically adjusted according to data dependent noise. For example, a comparison in an add-compare-select (ACS) unit of a Viterbi decoder may be adjusted or offset terms in error event filters may be biased to choose a Viterbi sequence with more transitions or to compensate for polarity dependent noise.
摘要翻译：公开了一种用于在数据读取通道中提供数据相关检测的装置。读通道中的参数根据数据相关噪声进行动态调整。例如，可以调整维特比解码器的加法比较选择（ACS）单元中的比较，或者错误事件滤波器中的偏移项可能被偏置以选择具有更多跃迁的维特比序列或补偿极性相关噪声。

5. 发明申请

US20060221478A1 Method and apparatus for providing a read channel having imbedded channel signal analysis 有权
标题翻译：用于提供具有嵌入信道信号分析的读通道的方法和装置
公开(公告)号：US20060221478A1
公开(公告)日：2006-10-05
申请号：US11095001
申请日：2005-03-31
申请人： Richard Galbraith , Travis Oenning , Eric Tree , Bruce Wilson
发明人： Richard Galbraith , Travis Oenning , Eric Tree , Bruce Wilson
IPC分类号： G11B20/10
CPC分类号： G11B20/10009 , G11B20/10055 , G11B20/10481 , G11B20/182
摘要： A method and apparatus for providing a read channel having imbedded channel signal analysis is disclosed.
摘要翻译：公开了一种提供具有嵌入式信道信号分析的读通道的方法和装置。

6. 发明申请

US20060022847A1 Method and apparatus for data coding for high density recording channels exhibiting low frequency contents 失效
标题翻译：用于数据编码用于显示低频内容的高密度记录通道的方法和装置
公开(公告)号：US20060022847A1
公开(公告)日：2006-02-02
申请号：US10903978
申请日：2004-07-30
申请人： Yuan Xing Lee , Ismail Demirkan , Richard Galbraith , Evangelos Eleftheriou , Roy Cideciyan
发明人： Yuan Xing Lee , Ismail Demirkan , Richard Galbraith , Evangelos Eleftheriou , Roy Cideciyan
IPC分类号： H03M7/00
CPC分类号： G11B20/1426 , G11B2020/1457 , H03M5/145
摘要： A method and apparatus for data coding for high-density recording channels exhibiting low frequency contents is disclosed. Coding is used that satisfies both Running Digital Sum (RDS) and Maximum Transition Run (MTR) properties, which are desirable for achieving high-density recording for recording channels exhibiting low frequency components such as perpendicular magnetic recording channel.
摘要翻译：公开了一种用于对显示低频内容的高密度记录通道进行数据编码的方法和装置。使用满足运行数字和（RDS）和最大转移运行（MTR）性质的编码，这是实现用于记录显示低频分量的通道的高密度记录所希望的，例如垂直磁记录通道。

7. 发明申请

US20060235919A1 Optimizing detector target polynomials in read/write channels to achieve best error rate performance in disk drives 有权
标题翻译：在读/写通道中优化检测器目标多项式，以实现磁盘驱动器中最佳的错误率性能
公开(公告)号：US20060235919A1
公开(公告)日：2006-10-19
申请号：US11110187
申请日：2005-04-19
申请人： Yuan Xing Lee , Richard Galbraith , Travis Oenning , Weldon Hanson
发明人： Yuan Xing Lee , Richard Galbraith , Travis Oenning , Weldon Hanson
IPC分类号： G06F17/15
CPC分类号： G11B20/24 , G11B20/10009 , G11B20/10046
摘要： Embodiments of the invention provide techniques for optimizing the detector target polynomials in read/write channels to achieve the best error rate performance in recording devices. In one embodiment, a method of obtaining a detector target polynomial of a read/write channel to achieve best error rate performance in a recording device comprises: providing an initial detector target for the read/write channel; measuring a noise autocorrelation of the read/write channel at the output of equalizer using channel hardware; computing a noise autocorrelation at the output of the 1st stage target based on the measured noise autocorrelation of the read/write channel at the output of equalizer; calculating optimal coefficients for the noise whitening filter; and obtaining the optimal detector target polynomial of the read/write channel using the calculated coefficients for noise whitening filter.
摘要翻译：本发明的实施例提供了用于优化读/写通道中的检测器目标多项式以在记录装置中实现最佳误码率性能的技术。在一个实施例中，获得读/写通道的检测器目标多项式以在记录装置中实现最佳误码率性能的方法包括：为读/写通道提供初始检测器目标; 使用信道硬件测量均衡器输出处的读/写通道的噪声自相关; 基于在均衡器的输出处的读/写通道的测量的噪声自相关来计算第1阶段目标的输出处的噪声自相关; 计算噪声增白滤波器的最优系数; 并使用所计算的噪声增白滤波器的系数来获得读/写信道的最佳检测器目标多项式。

8. 发明申请

US20050248873A1 DATA RECORDING SYSTEM WITH SERVO PATTERN HAVING PSEUDO-NOISE SEQUENCES 失效
标题翻译：具有PSEUDO-NOISE序列的SERVO模式的数据记录系统
公开(公告)号：US20050248873A1
公开(公告)日：2005-11-10
申请号：US10841034
申请日：2004-05-06
申请人： Jonathan Coker , David Flynn , Richard Galbraith
发明人： Jonathan Coker , David Flynn , Richard Galbraith
IPC分类号： G11B20/10 , G11B5/596 , G11B21/10 , G11B21/02
CPC分类号： G11B5/59655 , G11B5/59605
摘要： A data recording system uses a recording medium in which the tracks have pseudo-noise (PN) sequences with good autocorrelation properties as servo information for controlling the position of the recording head. A first set of alternating tracks uses a leading pseudo-random binary sequence (PRBS), which is a PN sequence with good autocorrelation properties, and a following PRBS that is cyclically shifted from the leading PRBS. A second set of alternating tracks interleaved with the first set also has a leading PRBS and a following PRBS that is cyclically shifted from the leading PRBS, but the leading PRBS in each of the tracks in the second set is offset along-the-track from the leading PRBS in the tracks of the first set. The head positioning control system uses the leading PRBS to generate a servo timing mark (STM), the cyclic shift to generate track identification (TID), and the following PRBS from adjacent tracks to generate the head position error signal (PES).
摘要翻译：数据记录系统使用其中轨道具有良好自相关特性的伪噪声（PN）序列的记录介质，作为用于控制记录头位置的伺服信息。第一组交替轨道使用前导伪随机二进制序列（PRBS），其是具有良好自相关特性的PN序列，以及从前导PRBS循环移位的以下PRBS。与第一组交织的第二组交替轨迹还具有前导PRBS和从前导PRBS循环移位的后续PRBS，但是第二组中的每个轨道中的前导PRBS沿着轨迹偏移领先的PRBS在第一集的轨道。头部定位控制系统使用前导PRBS来产生伺服定时标记（STM），循环移位以产生轨迹识别（TID），以及来自相邻轨道的后续PRBS以产生头部位置误差信号（PES）。

9. 发明申请

US20050213241A1 Apparatus for providing dynamic equalizer optimization 失效
标题翻译：用于提供动态均衡器优化的装置
公开(公告)号：US20050213241A1
公开(公告)日：2005-09-29
申请号：US10809230
申请日：2004-03-25
申请人： Roy Cideciyan , Ajay Dholakia , Evangelos Eleftheriou , Richard Galbraith , Weldon Hanson , Thomas Mittelholzer , Travis Oenning , Michael Ross , David Stanek
发明人： Roy Cideciyan , Ajay Dholakia , Evangelos Eleftheriou , Richard Galbraith , Weldon Hanson , Thomas Mittelholzer , Travis Oenning , Michael Ross , David Stanek
IPC分类号： G11B20/10 , G11B5/035 , G11B5/09
CPC分类号： G11B5/035
摘要： An apparatus for providing dynamic equalizer optimization is disclosed. The present invention solves the above-described problems by providing equalizer coefficient updates that converge towards the same solution as the direct method without having to first write a known pattern to the disk or requiring any prior knowledge of the data already written on the disk. The adaptive cosine function may be used to modify only a DFIR tap set, only the j and k parameters of a cosine equalizer or to modify both the tap set for a DFIR filter and the j and k parameters of the cosine equalizer. Another algorithm, such as the LMS algorithm, may be used to modify parameters not modified by the cosine algorithm.
摘要翻译：公开了一种用于提供动态均衡器优化的装置。本发明通过提供均衡器系数更新来解决上述问题，所述均衡器系数更新收敛于与直接方法相同的解决方案，而不必首先将已知模式写入盘或需要任何已经写入盘中的数据的任何知识。自适应余弦函数可用于仅修改DFIR抽头集，仅修改余弦均衡器的j和k参数，或者修改DFIR滤波器的抽头集合和余弦均衡器的j和k参数。可以使用诸如LMS算法的另一种算法来修改未被余弦算法修改的参数。

10. 发明申请

US20050078772A1 Apparatus using a lengthened equalization target filter with a matched filter metric in a viterbi detector 失效
标题翻译：在维特比检测器中使用具有匹配滤波器度量的延长均衡目标滤波器的装置
公开(公告)号：US20050078772A1
公开(公告)日：2005-04-14
申请号：US10683645
申请日：2003-10-10
申请人： Roy Cideciyan , Ajay Dholakia , Evangelos Eleftheriou , Richard Galbraith , Thomas Mittelholzer , Travis Oenning
发明人： Roy Cideciyan , Ajay Dholakia , Evangelos Eleftheriou , Richard Galbraith , Thomas Mittelholzer , Travis Oenning
IPC分类号： G11B20/10 , H04L27/06
CPC分类号： G11B20/10046 , G11B20/10009 , G11B20/10055 , G11B20/10296
摘要： An apparatus that uses a lengthened equalization target filter with a matched filter metric in a Viterbi detector is disclosed. The equalization target includes a base partial response component, i.e., (1−D2), a fractional coefficient polynomial component to whiten the noise, i.e., (1+p1D+p2D2), and a time-reversed replica of the noise-whitening component. Thus, the time-reversed replica of the noise-whitening component comes from what was formerly a matched filter component.
摘要翻译：公开了一种在维特比检测器中使用具有匹配滤波器度量的延长均衡目标滤波器的装置。均衡目标包括基本部分响应分量，即（1-D 2），用于使噪声增白的分数系数多项式分量，即（1 + p1D + p2D 2）和时间反转副本的增白组分。因此，噪声增白部件的时间反转复制品来自以前的匹配滤波器部件。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式