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11. 发明授权

US5949820A Method for optimizing an equalization and receive filter 失效
标题翻译：优化均衡和接收滤波器的方法
公开(公告)号：US5949820A
公开(公告)日：1999-09-07
申请号：US690950
申请日：1996-08-01
申请人： Shih-Ming Shih , Hemant K. Thapar
发明人： Shih-Ming Shih , Hemant K. Thapar
IPC分类号： G05F3/22 , G11B5/00 , G11B5/035 , G11B20/10 , G11B20/18 , G11B33/14 , H03F1/30 , H03H11/04 , H03H11/12 , H03H11/50 , H03H21/00 , H03H7/30
CPC分类号： G11B20/10055 , G05F3/225 , G11B20/10009 , G11B20/10481 , H03H11/1291 , H03H21/0001 , G11B2005/001 , G11B33/14 , G11B5/035 , H03H21/0012
摘要： Apparatus and Methods are disclosed for adaptively optimizing an ER filter in a readback system of a storage device, such as a disk drive. A sample value is read from the storage device and an error measure is calculated between the sample value and an ideal value. Pole parameters and zeros of the ER filter are modified to minimize the ER filter. The apparatus and methods disclosed can function with customer data to adaptively optimize the ER filter in real time during normal operation of the storage device. Furthermore, temperature compensation circuits are disclosed to compensate for temperature dependencies in the ER filter.
摘要翻译：公开了用于在诸如磁盘驱动器的存储设备的回读系统中自适应地优化ER滤波器的装置和方法。从存储设备读取样本值，并在样本值和理想值之间计算误差测量值。 ER滤波器的极参数和零点被修改以使ER滤波器最小化。所公开的装置和方法可以与客户数据一起工作，以在存储装置的正常操作期间实时自适应地优化ER滤波器。此外，公开了温度补偿电路来补偿ER滤波器中的温度依赖性。

12. 发明授权

US5914989A PRML system with reduced complexity maximum likelihood detector 失效
标题翻译： PRML系统具有降低的复杂度最大似然检测器
公开(公告)号：US5914989A
公开(公告)日：1999-06-22
申请号：US800989
申请日：1997-02-18
申请人： Hemant K. Thapar , Shih-Ming Shih , Kwok W. Yeung
发明人： Hemant K. Thapar , Shih-Ming Shih , Kwok W. Yeung
IPC分类号： G11B20/14 , G11B20/10 , G11B20/18 , H03G3/20 , H03M13/23 , H03M13/39 , H04L1/00 , H03M13/12
CPC分类号： G11B20/10009
摘要： A less complex maximum likelihood detector can be implemented in a partial response maximum likelihood (PRML) system without degrading system performance by saturating y values from a gain control loop to a smaller range before the y values are supplied to the maximum likelihood detector. A quantity "D" of a maximum likelihood detector operating in accordance with a partial response scheme has a particular relationship with respect to the maximum (ymax) of the y input values processed by the maximum likelihood detector. In some embodiments, y values from a gain control loop are saturated from a first larger range (defined by ymaxreal) to a second smaller range (defined by a value SAT) which is at least as great as the ymax of the ideal input signal (ymaxideal) for the partial response scheme. The saturated y values are provided to the maximum likelihood detector. The D of the maximum likelihood detector (given the partial response scheme and the smaller range of y values) is in a different "two to the power of an integer range" than the D would have been given the same partial response scheme but the larger range of y values.
摘要翻译：可以在部分响应最大似然（PRML）系统中实施不太复杂的最大似然检测器，而不会在将y值提供给最大似然检测器之前将y值从增益控制环饱和到更小的范围，而不降低系统性能。根据部分响应方案操作的最大似然检测器的数量“D”与由最大似然检测器处理的y个输入值的最大值（ymax）具有特定的关系。在一些实施例中，来自增益控制环路的y值从至少与理想输入信号的ymax一样大的第一较大范围（由ymaxreal定义）饱和到第二较小范围（由SAT定义） ymaxideal）用于部分响应方案。饱和的y值被提供给最大似然检测器。最大似然检测器（给定部分响应方案和y值的较小范围）的D与D给出相同的部分响应方案不同的“二到整数范围的功率”，但是较大 y值的范围。

13. 发明授权

US5602692A Sampled position error signal demodulation system for banded data disk drives 失效
标题翻译：带状数据磁盘驱动器采样位置误差信号解调系统
公开(公告)号：US5602692A
公开(公告)日：1997-02-11
申请号：US320021
申请日：1994-10-07
申请人： David A. Freitas , Shih-Ming Shih
发明人： David A. Freitas , Shih-Ming Shih
IPC分类号： G11B5/596
CPC分类号： G11B5/59616
摘要： A servo signal demodulator for a banded data disk drive system includes a single data sampling clock for both the data channel sampling and the servo data sampling. The demodulator includes an analog-to-digital converter that receives a readback signal from a read/write head of the disk drive system and generates samples of the readback signal in accordance with a repeating sampling clock signal whose frequency changes as a function of a data band of the disk drive over which the read/write head is positioned, an adder that sums the readback signal samples from the analog-to-digital converter to thereby produce an integrated readback signal value, and a servo signal decoder circuit that latches the adder sum to a register after the adder has summed a sufficient number of readback signal samples to comprise a servo burst, in accordance with a data channel sampling clock signal, and provides demodulated signal information to a servo controller.
摘要翻译：用于带状数据盘驱动系统的伺服信号解调器包括用于数据信道采样和伺服数据采样两者的单个数据采样时钟。解调器包括模数转换器，其从盘驱动系统的读/写头接收回读信号，并根据频率随数据变化的重复采样时钟信号产生回读信号的样本读/写头位于其上的磁盘驱动器的带;加法器，将来自模数转换器的回读信号样本相加，从而产生积分回读信号值;以及伺服信号解码电路，锁存加法器在加法器根据数据通道采样时钟信号将足够数量的回读信号样本相加以包括伺服脉冲之后，将其加到寄存器，并将解调的信号信息提供给伺服控制器。

14. 发明授权

US08370730B2 Soft output viterbi detector with error event output 有权
公开(公告)号：US08370730B2
公开(公告)日：2013-02-05
申请号：US12455803
申请日：2009-06-04
申请人： Shih-Ming Shih , Kwok Alfred Yeung
发明人： Shih-Ming Shih , Kwok Alfred Yeung
IPC分类号： H04B15/00
CPC分类号： H03M13/25 , H03M13/4138 , H03M13/4146
摘要： Outputting information for recovering a sequence of data is disclosed. Outputting includes making a decision that selects a first sequence of states corresponding to a surviving path, determining a second sequence of states corresponding to a non-surviving path associated with the decision, and defining a possible error event based at least in part on the second sequence of states.

15. 发明授权

US08077814B2 Preamble acquisition without second order timing loops 有权
标题翻译：前导采集无二阶定时循环
公开(公告)号：US08077814B2
公开(公告)日：2011-12-13
申请号：US12960043
申请日：2010-12-03
申请人： Haitao Xia , Shih-Ming Shih , Ryan Yu , Marcus Marrow , Kai Keung Chan
发明人： Haitao Xia , Shih-Ming Shih , Ryan Yu , Marcus Marrow , Kai Keung Chan
IPC分类号： H04L27/06
CPC分类号： H04L7/08
摘要： A clock is adjusted by obtaining a first plurality of samples and a second plurality of samples associated with a preamble portion of a data packet. The first plurality of samples and the second plurality of samples are sampled using a clock. A first intermediate value is determined based at least in part on the first plurality of samples and a second intermediate value is determined based at least in part on the second plurality of samples. An ending value associated with an end of the preamble portion is determined based at least in part on the first intermediate value and the second intermediate value. The clock is adjusted based at least in part on the ending value without use of a second order timing loop.
摘要翻译：通过获得与数据分组的前导部分相关联的第一多个样本和第二多个样本来调整时钟。使用时钟对第一多个采样和第二多个采样进行采样。至少部分地基于第一多个样本确定第一中间值，并且至少部分地基于第二多个样本来确定第二中间值。至少部分地基于第一中间值和第二中间值来确定与前导码部分的结尾相关联的结束值。时钟至少部分地基于结束值进行调整，而不使用二阶定时循环。

16. 发明授权

US07835466B1 Baseline wander compensation for perpendicular recording 有权
标题翻译：垂直记录的基线漂移补偿
公开(公告)号：US07835466B1
公开(公告)日：2010-11-16
申请号：US11786762
申请日：2007-04-11
申请人： Marcus Marrow , Shih-Ming Shih
发明人： Marcus Marrow , Shih-Ming Shih
IPC分类号： H04L25/06 , H04L25/10
CPC分类号： H04L25/06 , G11B20/10046 , G11B20/10203 , G11B20/10296 , G11B2220/2512
摘要： Baseline wander is removed. A first decision signal is generated from an input signal using a first detector. Baseline wander associated with the input signal is estimated using the first decision signal. The estimated baseline wander is removed from the input signal. A second decision signal is generated from the input signal with the baseline wander removed using a second detector.
摘要翻译：基线漂流被删除。使用第一检测器从输入信号生成第一判定信号。使用第一判定信号估计与输入信号相关联的基线漂移。从输入信号中去除估计的基线漂移。使用第二检测器从输入信号产生第二判定信号，其中基线漂移被去除。

17. 发明申请

US20100117969A1 MONITORING ASSEMBLY EMBEDDED TO A PERSONAL COMPUTER FOR INCREASING OPERATION SPACE 审中-公开
标题翻译：监控组件嵌入个人计算机以增加操作空间
公开(公告)号：US20100117969A1
公开(公告)日：2010-05-13
申请号：US12268451
申请日：2008-11-11
申请人： Shih-Ming Shih
发明人： Shih-Ming Shih
IPC分类号： G06F3/041
CPC分类号： G06F1/181 , G06F11/328
摘要： A personal computer monitoring assembly by embedding a touch-controlling retaining seat to a personal computer for increasing a touch-controlling operation space includes following components. A retaining seat needs a least one receiving slot of a casing panel of a personal computer in installation. Each of two sides of the retaining seat is extended with an extension portion. A front end of the retaining seat has an opening and a back side of thereof is installed with a locking unit. A circuit substrate is formed with locking holes and a front side of the circuit substrate is installed with a monitoring display panel. A wire bus is extended from the circuit substrate and is connected to a touch panel, and a circuit interface is arranged to be connected to a computer mother board. A touch panel has a plurality of micro switch touch sensitive points.
摘要翻译：通过将个人计算机监控组件嵌入到个人计算机中以增加触摸控制操作空间的个人计算机监视组件包括以下部件。保持座位在安装时需要个人计算机的壳体面板的至少一个接收槽。保持座的两侧各延伸一段延伸部分。保持座的前端具有开口，并且其后侧安装有锁定单元。电路基板形成有锁定孔，并且电路基板的前侧安装有监视显示面板。有线总线从电路基板延伸并连接到触摸面板，并且电路接口被布置成连接到计算机母板。触摸面板具有多个微动开关触敏点。

18. 发明授权

US07400561B2 Single PLL demodulation of pre-formatted information embedded in optical recording medium 有权
标题翻译：预先格式化信息的单PLL解调嵌入在光学记录介质中
公开(公告)号：US07400561B2
公开(公告)日：2008-07-15
申请号：US11012529
申请日：2004-12-14
申请人： Louis J. Serrano , Shih-Ming Shih
发明人： Louis J. Serrano , Shih-Ming Shih
IPC分类号： G11B7/00
CPC分类号： G11B20/10222 , G11B7/0053 , G11B20/10009 , G11B20/1403
摘要： A method and apparatus demodulate pre-formatted information embedded in an optical recording medium. The demodulation includes (a) receiving a wobble signal representing data symbols frequency-modulated on a carrier frequency, (b) generating a phase delta signal representing a phase difference between the wobble signal and a corresponding locked signal having the carrier frequency, (c) first sampling the phase delta signal at a data sampling interval to produce first values, (d) second sampling the phase delta signal at each halfway of the data sampling interval to generate second values, (e) determining, based on a difference between two successive second values, if the first sampling is performed at timing corresponding to an end of each data symbol, and (e) adjusting sampling timing of the first sampling towards the timing corresponding to each end of the data symbols, if the sampling timing does not corresponds to the end of each data symbol.
摘要翻译：解调嵌入在光学记录介质中的预格式化信息的方法和装置。解调包括（a）接收表示在载波频率上进行频率调制的数据符号的摆动信号，（b）产生表示摆动信号和具有载波频率的相应锁定信号之间的相位差的相位增量信号，（c）首先以数据采样间隔对相位增量信号进行采样以产生第一值，（d）在数据采样间隔的每一半处对相位增量信号进行二次采样以产生第二值，（e）基于两个连续的第二值，如果在与每个数据符号的结尾对应的定时执行第一采样，以及（e）如果采样定时不对应，则将调整第一采样的采样定时朝向对应于数据符号的每个端的定时到每个数据符号的末尾。

19. 发明授权

US07138840B2 Single VCO/loop filter to control a wobble and read circuit of a DVD and/or CD recorder 有权
标题翻译：单个VCO /环路滤波器来控制DVD和/或CD刻录机的摆动和读取电路
公开(公告)号：US07138840B2
公开(公告)日：2006-11-21
申请号：US10674165
申请日：2003-09-29
申请人： Louis J. Serrano , Shih-Ming Shih , Shirish A. Altekar
发明人： Louis J. Serrano , Shih-Ming Shih , Shirish A. Altekar
IPC分类号： H03L7/06
CPC分类号： G11B20/1403 , G11B7/0053 , G11B20/10009
摘要： An apparatus comprising a clock generation circuit, a detect circuit and a select circuit. The clock generator circuit may be configured to generate an output clock signal in response to a control signal. The detect circuit may be configured to generate a detect signal in response to (i) the output clock signal and (ii) an input signal. The select circuit may be configured to generate the control signal by selecting (i) a first input when in a first mode (ii) the detect signal when in a second mode. The first and second modes are selected in response to a selection signal.
摘要翻译：一种包括时钟发生电路，检测电路和选择电路的装置。时钟发生器电路可以被配置为响应于控制信号而产生输出时钟信号。检测电路可以被配置为响应于（i）输出时钟信号和（ii）输入信号而产生检测信号。选择电路可以被配置为通过在处于第二模式时选择（i）处于第一模式（ii）检测信号时的第一输入来产生控制信号。响应于选择信号选择第一和第二模式。

20. 发明申请

US20060126454A1 Single PLL demodulation of pre-formatted information embedded in optical recording medium 有权
标题翻译：预先格式化信息的单PLL解调嵌入在光学记录介质中
公开(公告)号：US20060126454A1
公开(公告)日：2006-06-15
申请号：US11012529
申请日：2004-12-14
申请人： Louis Serrano , Shih-Ming Shih
发明人： Louis Serrano , Shih-Ming Shih
IPC分类号： G11B7/00
CPC分类号： G11B20/10222 , G11B7/0053 , G11B20/10009 , G11B20/1403
摘要： A method and apparatus demodulate pre-formatted information embedded in an optical recording medium. The demodulation includes (a) receiving a wobble signal representing data symbols frequency-modulated on a carrier frequency, (b) generating a phase delta signal representing a phase difference between the wobble signal and a corresponding locked signal having the carrier frequency, (c) first sampling the phase delta signal at a data sampling interval to produce first values, (d) second sampling the phase delta signal at each halfway of the data sampling interval to generate second values, (e) determining, based on a difference between two successive second values, if the first sampling is performed at timing corresponding to an end of each data symbol, and (e) adjusting sampling timing of the first sampling towards the timing corresponding to each end of the data symbols, if the sampling timing does not corresponds to the end of each data symbol.
摘要翻译：解调嵌入在光学记录介质中的预格式化信息的方法和装置。解调包括（a）接收表示在载波频率上进行频率调制的数据符号的摆动信号，（b）产生表示摆动信号和具有载波频率的相应锁定信号之间的相位差的相位增量信号，（c）首先以数据采样间隔对相位增量信号进行采样以产生第一值，（d）在数据采样间隔的每一半处对相位增量信号进行二次采样以产生第二值，（e）基于两个连续的第二值，如果在与每个数据符号的结尾对应的定时执行第一采样，以及（e）如果采样定时不对应，则将调整第一采样的采样定时朝向对应于数据符号的每个端的定时到每个数据符号的末尾。

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