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1. 发明授权

US07990643B1 Read channel configuration based on polarity determined in accordance with multiple framings of signal samples 有权
标题翻译：根据信号样本的多个帧确定的极性读取通道配置
公开(公告)号：US07990643B1
公开(公告)日：2011-08-02
申请号：US12795129
申请日：2010-06-07
申请人： Ke Han , Pantas Sutardja , Rui Cao
发明人： Ke Han , Pantas Sutardja , Rui Cao
IPC分类号： G11B27/36 , G11B5/035
CPC分类号： G11B5/59644 , G11B20/14
摘要： Systems and techniques to configure a read channel include, in at least one implementation, an apparatus including: detection circuitry configured to process an input signal from a machine-readable medium to calculate metrics; monitoring circuitry configured to determine a polarity of the input signal based on the metrics and at least one of multiple framings of signal samples of the input signal; and selection circuitry to configure a read channel for the machine-readable medium based on the determined polarity.
摘要翻译：用于配置读通道的系统和技术在至少一个实现中包括：设备，包括：检测电路，被配置为处理来自机器可读介质的输入信号以计算度量; 监视电路，被配置为基于所述度量和所述输入信号的信号样本的多个成帧中的至少一个来确定所述输入信号的极性; 以及选择电路，用于基于所确定的极性来配置机器可读介质的读通道。

2. 发明授权

US07760459B1 Framing selection and waveform polarity determination for an encoded repeating pattern 有权
标题翻译：编码重复图案的成帧选择和波形极性确定
公开(公告)号：US07760459B1
公开(公告)日：2010-07-20
申请号：US11953794
申请日：2007-12-10
申请人： Ke Han , Pantas Sutardja , Rui Cao
发明人： Ke Han , Pantas Sutardja , Rui Cao
IPC分类号： G11B21/02 , G11B5/596 , G11B20/06
CPC分类号： G11B5/59644 , G11B20/14
摘要： Systems and techniques to select a framing and determine a waveform polarity of an encoded repeating pattern include, in at least one aspect, operations including: decoding an encoded repeating pattern using multiple framings of signal samples of a signal from a machine-readable medium; correlating the signal samples that indicate pattern transitions, for the multiple framings, with valid pattern transitions as defined by the encoding; accumulating the transition pattern correlations for the multiple framings; selecting one of the multiple framings as a correct framing for decoding based on the accumulated correlations; and determining a waveform polarity for the signal based on the repeating pattern and the selected correct framing.
摘要翻译：选择成帧并确定编码的重复图案的波形极性的系统和技术在至少一个方面包括以下操作：包括：使用来自机器可读介质的信号的信号样本的多个成帧来对编码的重复图案进行解码; 对于多个帧，指示模式转换的信号样本与由编码定义的有效模式转换相关; 累积多个帧的过渡模式相关性; 基于累积的相关性，将多个帧中的一个选择为正确的解码帧; 以及基于所述重复图案和所选择的正确框架确定所述信号的波形极性。

3. 发明授权

US07580216B1 Disk servo pattern writing 有权
标题翻译：磁盘伺服模式写入
公开(公告)号：US07580216B1
公开(公告)日：2009-08-25
申请号：US11953811
申请日：2007-12-10
申请人： Ke Han , Pantas Sutardja , Rui Cao
发明人： Ke Han , Pantas Sutardja , Rui Cao
IPC分类号： G11B21/02 , G11B5/596 , G11B20/06
CPC分类号： G11B5/59644 , G11B20/14
摘要： Systems and techniques to write servo patterns on machine-readable media. In general, in one implementation, the technique includes: obtaining timing information from a spiral servo reference track on a machine-readable medium to determine head position, and generating a servo track with servo information based on the determined head position. Obtaining the timing information can involve determining a peak position of a diamond-shaped waveform and identifying occurrences of a timing-reference symbol in the spiral servo reference track. Moreover, identifying occurrences of the timing-reference symbol can involve decoding an encoded repeating pattern using multiple framings, correlating signal samples that indicate pattern transitions with valid pattern transitions as defined by the encoding, accumulating the transition pattern correlations for the multiple framings, selecting one of the multiple framings as a correct framing, and determining a waveform polarity for the signal.
摘要翻译：在机器可读介质上写入伺服模式的系统和技术。通常，在一个实现中，该技术包括：从机器可读介质上的螺旋伺服参考轨道获取定时信息以确定磁头位置，以及基于确定的磁头位置产生具有伺服信息的伺服磁道。获取定时信息可以包括确定菱形波形的峰值位置并且识别螺旋伺服参考轨道中的定时参考符号的出现。此外，识别定时参考符号的出现可以包括使用多个成帧对编码的重复模式进行解码，将指示模式转换的信号样本与由编码定义的有效模式转换相关联，累积多个帧的转换模式相关性，选择一个的多个帧作为正确的帧，并且确定该信号的波形极性。

4. 发明授权

US07864895B1 Viterbi detection using a correlation metric 有权
标题翻译：维特比检测采用相关度量
公开(公告)号：US07864895B1
公开(公告)日：2011-01-04
申请号：US10799543
申请日：2004-03-11
申请人： Ke Han , Pantas Sutardja , Rui Cao
发明人： Ke Han , Pantas Sutardja , Rui Cao
IPC分类号： G11B5/596
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666 , G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10277 , G11B20/10296 , G11B20/1217 , G11B2020/1281 , G11B2220/2516
摘要： Systems and techniques to interpret signals on a channel. In general, in one implementation, the technique includes: obtaining an output signal sequence from a partial response channel, determining an input sequence of the partial response channel by maximizing a correlation metric of an estimated output sequence with the obtained output sequence, the estimated output sequence being estimated based on the partial response channel, and providing an output corresponding to the determined input sequence. An apparatus can include a branch metric generator that generates branch metrics comprising a correlation of obtained output sequences and estimated output sequences for a partial response channel. The apparatus can further include an add-compare-select component that compares paths and determines survivor paths using generated branch metrics, a memory that retains metrics information, and a trace-back component that determines a best path of the survivor paths and outputs sequence information based on the determined best path.
摘要翻译：系统和技术来解释信道上的信号。通常，在一个实现中，该技术包括：从部分响应信道获得输出信号序列，通过使用所获得的输出序列最大化估计输出序列的相关度量，估计输出来确定部分响应信道的输入序列基于部分响应信道估计序列，并提供与所确定的输入序列相对应的输出。一种装置可以包括分支度量发生器，其生成包括获得的输出序列与部分响应信道的估计输出序列的相关性的分支度量。该装置还可以包括比较路径并使用生成的分支度量来确定幸存者路径的加法比较选择组件，保留度量信息的存储器以及确定幸存路径的最佳路径并输出序列信息的追溯组件基于确定的最佳路径。

5. 发明授权

US07307807B1 Disk servo pattern writing 有权
标题翻译：磁盘伺服模式写入
公开(公告)号：US07307807B1
公开(公告)日：2007-12-11
申请号：US10799474
申请日：2004-03-11
申请人： Ke Han , Pantas Sutardja , Rui Cao
发明人： Ke Han , Pantas Sutardja , Rui Cao
IPC分类号： G11B21/02 , G11B5/596 , G11B20/06
CPC分类号： G11B5/59644 , G11B20/14
摘要： Systems and techniques to write servo patterns on machine-readable media. In general, in one implementation, the technique includes: obtaining timing information from a spiral servo reference track on a machine-readable medium to determine head position, and generating a servo track with servo information based on the determined head position. Obtaining the timing information can involve determining a peak position of a diamond-shaped waveform and identifying occurrences of a timing-reference symbol in the spiral servo reference track. Moreover, identifying occurrences of the timing-reference symbol can involve decoding an encoded repeating pattern using multiple framings, correlating signal samples that indicate pattern transitions with valid pattern transitions as defined by the encoding, accumulating the transition pattern correlations for the multiple framings, selecting one of the multiple framings as a correct framing, and determining a waveform polarity for the signal.
摘要翻译：在机器可读介质上写入伺服模式的系统和技术。通常，在一个实现中，该技术包括：从机器可读介质上的螺旋伺服参考轨道获取定时信息以确定磁头位置，以及基于确定的磁头位置产生具有伺服信息的伺服磁道。获取定时信息可以包括确定菱形波形的峰值位置并且识别螺旋伺服参考轨道中的定时参考符号的出现。此外，识别定时参考符号的出现可以包括使用多个成帧对编码的重复模式进行解码，将指示模式转换的信号样本与由编码定义的有效模式转换相关联，累积多个帧的转换模式相关性，选择一个的多个帧作为正确的帧，并且确定该信号的波形极性。

6. 发明授权

US07821731B2 Timing recovery for data storage channels with buffered sectors 有权
公开(公告)号：US07821731B2
公开(公告)日：2010-10-26
申请号：US11981921
申请日：2007-10-31
申请人： Pantas Sutardja , Ke Han , Zining Wu
发明人： Pantas Sutardja , Ke Han , Zining Wu
IPC分类号： G11B5/09
CPC分类号： G11B20/1403 , G11B20/10009 , G11B20/10222 , G11B20/10527 , G11B2020/1062
摘要： A storage channel, e.g., for a disk drive system, may asynchronously sample and buffer an entire sector, and then process the buffered sector to recover timing information. The storage channel may operate in an open-loop and utilize an exhaustive search to determine timing parameters. Alternatively, the storage channel may operative in a closed-loop, processing the sector once, and feeding back information obtained during decoding to the timing loop.

7. 发明授权

US07715134B1 Demodulation compensation for spiral servo tracks in hard disk drives 有权
标题翻译：硬盘驱动器中螺旋伺服磁道的解调补偿
公开(公告)号：US07715134B1
公开(公告)日：2010-05-11
申请号：US12330789
申请日：2008-12-09
申请人： Pantas Sutardja , Ke Han
发明人： Pantas Sutardja , Ke Han
IPC分类号： G11B5/02
CPC分类号： G11B5/5526 , G11B5/596 , G11B5/59605
摘要： A servo compensation processor includes an input that receives samples of a waveform generated from a servo track, the servo track including servo data and synchronization symbols. A peak estimator estimates a first location of a peak amplitude of the waveform. A phase determiner determines a sampling phase based on a first number of the samples between one of the synchronization symbols and a first predetermined one of the samples. A compensator determines a compensation amount based on a compensation curve and the sampling phase. A location estimator determines a second location of the peak amplitude based on the first location and the compensation amount. A location determiner determines a center location of the servo track based on the second location.
摘要翻译：伺服补偿处理器包括接收从伺服轨迹产生的波形的采样的输入，所述伺服轨迹包括伺服数据和同步符号。峰值估计器估计波形的峰值幅度的第一位置。相位确定器基于同步符号之一和样本中的第一预定样本之间的第一数目的样本来确定采样相位。补偿器基于补偿曲线和采样阶段来确定补偿量。位置估计器基于第一位置和补偿量来确定峰值幅度的第二位置。位置确定器基于第二位置确定伺服轨道的中心位置。

8. 发明授权

US07203017B1 Timing recovery for data storage channels with buffered sectors 有权
标题翻译：具有缓冲扇区的数据存储通道的定时恢复
公开(公告)号：US07203017B1
公开(公告)日：2007-04-10
申请号：US10794733
申请日：2004-03-05
申请人： Pantas Sutardja , Ke Han , Zining Wu
发明人： Pantas Sutardja , Ke Han , Zining Wu
IPC分类号： G11B5/09
CPC分类号： G11B20/1403 , G11B20/10009 , G11B20/10222 , G11B20/10527 , G11B2020/1062
摘要： A storage channel, e.g., for a disk drive system, may asynchronously sample and buffer an entire sector, and then process the buffered sector to recover timing information. The storage channel may operate in an open-loop and utilize an exhaustive search to determine timing parameters. Alternatively, the storage channel may operative in a closed-loop, processing the sector once, and feeding back information obtained during decoding to the timing loop.
摘要翻译：诸如用于磁盘驱动器系统的存储通道可以异步地对整个扇区进行采样和缓冲，然后处理缓冲的扇区以恢复定时信息。存储通道可以在开环中操作并利用穷举搜索来确定时序参数。或者，存储通道可以在闭环中操作，一次处理该扇区，并将解码期间获得的信息反馈到定时循环。

9. 发明授权

US07002761B1 Demodulation compensation for spiral servo tracks in hard disk drives 有权
标题翻译：硬盘驱动器中螺旋伺服磁道的解调补偿
公开(公告)号：US07002761B1
公开(公告)日：2006-02-21
申请号：US10644166
申请日：2003-08-20
申请人： Pantas Sutardja , Ke Han
发明人： Pantas Sutardja , Ke Han
IPC分类号： G11B20/06
CPC分类号： G11B5/5526 , G11B5/596 , G11B5/59605
摘要： A hard disk drive, and method and computer program therefor, comprising a hard disk having one or more spiral servo tracks written thereon, wherein each of the servo tracks comprises servo data comprising one or more synchronization symbols; a head adapted to produce a waveform as the head moves across the servo track; a sampler adapted to obtain a plurality of samples of the waveform, wherein the plurality of samples of the waveform comprises one of the synchronization symbols; and a processor adapted to determine an estimated location of a peak amplitude of the waveform with respect to the plurality of samples of the waveform, determine a sampling phase defined by a number of the samples between one of the synchronization symbols and a predetermined one of the samples of the waveform, determine a compensation amount based on a compensation curve and the sampling phase, determine a refined estimated location of the peak amplitude of the waveform based on the estimated location of the peak amplitude of the waveform and the compensation amount, and determine the location of the center of the servo track based on the refined estimated location of the peak amplitude of the waveform.
摘要翻译：一种硬盘驱动器及其方法和计算机程序，包括其上写有一个或多个螺旋伺服磁道的硬盘，其中每个伺服磁道包括包括一个或多个同步符号的伺服数据; 当头部移动穿过伺服轨道时适于产生波形的头部; 适于获得所述波形的多个采样的采样器，其中所述波形的所述多个采样包括所述同步符号之一; 以及处理器，适于确定相对于所述波形的所述多个样本的所述波形的峰值幅度的估计位置，确定由所述同步符号中的一个与所述多个样本之间的预定的一个基于补偿曲线和采样相位确定补偿量，基于波形的峰值幅度和补偿量的估计位置确定波形的峰值幅度的精确估计位置，并确定波形样本基于波形峰值幅度的精确估计位置的伺服磁道中心的位置。

10. 发明授权

US07773325B2 Timing recovery for data storage channels with buffered sectors 有权
标题翻译：具有缓冲扇区的数据存储通道的定时恢复
公开(公告)号：US07773325B2
公开(公告)日：2010-08-10
申请号：US11733728
申请日：2007-04-10
申请人： Pantas Sutardja , Ke Han , Zining Wu
发明人： Pantas Sutardja , Ke Han , Zining Wu
IPC分类号： G11B5/09
CPC分类号： G11B20/1403 , G11B20/10009 , G11B20/10222 , G11B20/10527 , G11B2020/1062
摘要： A storage channel, e.g., for a disk drive system, may asynchronously sample and buffer an entire sector, and then process the buffered sector to recover timing information. The storage channel may operate in an open-loop and utilize an exhaustive search to determine timing parameters. Alternatively, the storage channel may operative in a closed-loop, processing the sector once, and feeding back information obtained during decoding to the timing loop.
摘要翻译：诸如用于磁盘驱动器系统的存储通道可以异步地对整个扇区进行采样和缓冲，然后处理缓冲的扇区以恢复定时信息。存储通道可以在开环中操作并利用穷举搜索来确定时序参数。或者，存储通道可以在闭环中操作，一次处理该扇区，并将解码期间获得的信息反馈到定时循环。

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