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1. 发明申请

US20140372080A1 Non-Fourier Spectral Analysis for Editing and Visual Display of Music 审中-公开
标题翻译：音乐编辑和视觉显示的非傅立叶频谱分析
公开(公告)号：US20140372080A1
公开(公告)日：2014-12-18
申请号：US13917551
申请日：2013-06-13
申请人： David C. Chu
发明人： David C. Chu
IPC分类号： G01H17/00
CPC分类号： G10H1/0008 , G10H2210/066 , G10H2210/395 , G10H2220/005
摘要： System and method for identifying tones present in a short segment of digitized music stream, and for reporting simultaneously and quantitatively their respective magnitude and phase in near real time. Also captured are pitch deviations from the nominal tones of a predetermined music scale. The resulting spectral data can be scrolled manually from frame to frame to facilitate detail music evaluation and editing. The apparatus can also operate at real time to display notes being played, or to tone-activate audio-visual music enhancement and display with automatic synchronization.
摘要翻译：用于识别存在于数字化音乐流的短段中的音调的系统和方法，以及用于近似实时地同时和定量地报告其相应的幅度和相位。还捕获了与预定乐谱的标称音调的音调偏差。所得到的光谱数据可以从帧到手动地滚动以便于细节音乐评估和编辑。该装置还可以实时操作以显示正在播放的音符，或者通过自动同步来进行音调激活音视频音乐增强和显示。

2. 发明授权

US07436519B2 System and method for interferometer non-linearity compensation 有权
标题翻译：用于干涉仪非线性补偿的系统和方法
公开(公告)号：US07436519B2
公开(公告)日：2008-10-14
申请号：US11142423
申请日：2005-06-01
申请人： David C. Chu , Lee C. Kalem , William Clay Schluchter
发明人： David C. Chu , Lee C. Kalem , William Clay Schluchter
IPC分类号： G01B11/02
CPC分类号： G01B9/02059 , G01B9/02003 , G01B9/02083
摘要： A method for non-linearity compensating interferometer position data generated from a measurement signal includes generating a first set of non-linearity parameters based on received digital position values. The method includes sensing whether a low velocity condition exists. A first one of the non-linearity parameters is updated based on an estimated magnitude of the measurement signal if the low velocity condition exists. At least one digital position value is compensated based on the updated non-linearity parameter if the low velocity condition exists.
摘要翻译：从测量信号生成的用于非线性补偿干涉仪位置数据的方法包括基于接收的数字位置值生成第一组非线性参数。该方法包括检测是否存在低速条件。如果存在低速条件，则基于测量信号的估计幅度来更新非线性参数中的第一个。如果存在低速条件，则基于更新的非线性参数来补偿至少一个数字位置值。

3. 发明授权

US5469466A System for highly repeatable clock parameter recovery from data modulated signals 失效
标题翻译：用于从数据调制信号恢复高度可重复的时钟参数的系统
公开(公告)号：US5469466A
公开(公告)日：1995-11-21
申请号：US183466
申请日：1994-01-19
申请人： David C. Chu
发明人： David C. Chu
IPC分类号： H04L7/02 , G01R23/10 , H04L1/20 , H04L7/033 , H04L7/027
CPC分类号： H04L1/205 , H04L7/0334
摘要： A system for recovering parameters of an underlying clock signal from data modulated signals includes a time digitizer, or time stamping device, for sampling and locating edges of the data modulated signals, thereby selectively providing time stamp readings identifying incoming edges of the data signals. The time stamp readings are used, along with a user-input nominal clock frequency, to determine an array of actual clock cycle stamps, each representing an integral number of actual clock cycles occurring between adjacent time stamps. The array is then used in conjunction with the time stamps to characterize parameters of the underlying clock data. Once the clock parameters are recovered, a wide variety of information, for example, frequency and phase information, including jitter, can be determined with a very modest rate of sampling compared to the high data bandwidth. No phase locked loops are used and no physical clock is recovered. The system is operable over a well-defined range and is highly repeatable, independent of particular circuit design detail or parametric performance of circuit components.
摘要翻译：用于从数据调制信号恢复基础时钟信号的参数的系统包括用于对数据调制信号的边缘进行采样和定位的时间数字化仪或时间戳装置，由此选择性地提供标识数据信号的进入边缘的时间戳读数。使用时间戳读数以及用户输入的标称时钟频率来确定实际时钟周期标记的阵列，每个时钟周期标记表示在相邻时间戳之间发生的实际时钟周期的整数。然后将该阵列与时间戳结合使用以表征底层时钟数据的参数。一旦时钟参数被恢复，与高数据带宽相比，可以以非常适中的采样速率来确定各种各样的信息，例如包括抖动的频率和相位信息。不使用锁相环，并且没有恢复物理时钟。该系统可在明确定义的范围内工作，并且高度可重复，独立于电路组件的特定电路设计细节或参数性能。

4. 发明授权

US4613951A Time interval measuring apparatus and method 失效
标题翻译：时间间隔测量装置及方法
公开(公告)号：US4613951A
公开(公告)日：1986-09-23
申请号：US659815
申请日：1984-10-11
申请人： David C. Chu
发明人： David C. Chu
IPC分类号： G04F10/04 , G04F10/00 , H03K5/159
CPC分类号： G04F10/00
摘要： A time interval measuring apparatus is provided for measuring the time interval between two signals. The two signals are successively brought to synchronization by delaying one of the two signals as they pass through a series of time shift cells connected in tandem. These delays are accumulated in a register, and the total net delay which is required to bring the two signals into synchronization is indicative of the time interval between the two signals. This indication of the time interval between the two signals thus forms the time interval measurement thereof. It can be refined by increasing the number of time shift cells in tandem and using progressively finer delays.
摘要翻译：提供了用于测量两个信号之间的时间间隔的时间间隔测量装置。当两个信号通过串联连接的一系列时移单元时，通过延迟两个信号中的一个信号，使这两个信号相继进入同步。这些延迟累积在寄存器中，并且使两个信号同步所需的总净延迟指示两个信号之间的时间间隔。因此，两个信号之间的时间间隔的这种指示形成其时间间隔测量。可以通过逐步增加时移单元的数量并逐渐更细的延迟来改进。

5. 发明授权

US06738143B2 System and method for interferometer non-linearity compensation 有权
标题翻译：用于干涉仪非线性补偿的系统和方法
公开(公告)号：US06738143B2
公开(公告)日：2004-05-18
申请号：US10010175
申请日：2001-11-13
申请人： David C. Chu
发明人： David C. Chu
IPC分类号： G01B902
CPC分类号： G01B9/02059 , G01B9/02003 , G01B9/02083
摘要： A system and method for non-linearity compensating interferometer position data includes receiving a plurality of groups of digital position values. A first group of the digital position values are digitally processed to generate a plurality of data values. The plurality of data values are digitally processed to generate at least one quasi-static non-linearity parameter. A second group of the digital position values are compensated based on the at least one non-linearity parameter.
摘要翻译：用于非线性补偿干涉仪位置数据的系统和方法包括接收多组数字位置值。数字位置值的第一组被数字处理以产生多个数据值。多个数据值被数字处理以产生至少一个准静态非线性参数。基于至少一个非线性参数来补偿第二组数字位置值。

6. 发明授权

US5982831A Feed forward method and apparatus for generating a clock signal 失效
标题翻译：用于产生时钟信号的前馈方法和装置
公开(公告)号：US5982831A
公开(公告)日：1999-11-09
申请号：US604273
申请日：1996-02-21
申请人： David C. Chu
发明人： David C. Chu
IPC分类号： G06F1/12 , H04J3/06 , H04L7/00
CPC分类号： H04J3/0688 , H04L7/0083
摘要： A feed forward apparatus and method discipline a clock signal by a reference signal in digital telecommunication networks. A synthesizer correction term within the feed forward apparatus and method includes a frequency correction term so that when one frequency correction term is selected in place of another frequency correction term the phase of the clock signal remains free from extraneous frequency or phase variations during the transition between frequency correction terms. Alternatively, the synthesizer correction term includes a phase correction term so that phase coherence between the reference signal and the clock signal results.
摘要翻译：前馈装置和方法通过数字电信网络中的参考信号来管理时钟信号。前馈装置和方法中的合成器校正项包括频率校正项，使得当选择一个频率校正项代替另一个频率校正项时，时钟信号的相位在第二频率校正项之间的转换期间保持没有外来的频率或相位变化频率校正项。或者，合成器校正项包括相位校正项，使得参考信号和时钟信号之间的相位相干结果。

7. 发明授权

US5631933A Phase-locked digital synthesizers 失效
标题翻译：锁相数字合成器
公开(公告)号：US5631933A
公开(公告)日：1997-05-20
申请号：US604231
申请日：1996-02-21
申请人： David C. Chu , Jeremy S. Sommer
发明人： David C. Chu , Jeremy S. Sommer
IPC分类号： H03L7/00 , H03B28/00 , H03L7/07 , H04B1/74 , H04L1/22 , H04L7/00 , H04L23/00
CPC分类号： H04L1/22 , H03L7/07 , H04L7/0083
摘要： A master and a slave digital frequency synthesizer are phase-locked such that the master synthesizer is always selected to minimize the phase hits which occur when switching the master to be a slave and vice versa. The switching rearrangement is done automatically and rapidly in the event of failure of the master frequency synthesizer.
摘要翻译：主和从数字频率合成器是相位锁定的，从而总是选择主合成器以最小化将主机切换为从机时发生的相位命中，反之亦然。在主频率合成器发生故障的情况下，开关重新排列自动快速完成。

8. 发明授权

US5166959A Picosecond event timer 失效
标题翻译：皮秒活动计时器
公开(公告)号：US5166959A
公开(公告)日：1992-11-24
申请号：US810946
申请日：1991-12-19
申请人： David C. Chu , Thomas A. Knotts
发明人： David C. Chu , Thomas A. Knotts
IPC分类号： G04F10/04 , G01R29/027
CPC分类号： G01R29/0273
摘要： A circuit for time stamping event signals, e.g. zero-crossings, using coarse and fine timers. The fine timer is a circuit section which subdivides a period from a phase-locked ring-oscillator into 2N subparts. An event signal is timed by latching a digital representation of a particular subpart. The digital representation of the subpart is an N-bit dual thermometer code which uniquely identifies each subpart with each adjacent subpart differing by only one bit. The subparts are made finer in time quantization than the propagation delay of one active element in the ring oscillator by the use of linear combiner elements. The dual thermometer code, encoded post-latching into a binary code, forms the "fine" timing part of a binary word representation of the event time. The event also latches the count states of a pair of lead-lag counters in a master-slave configuration counting ring oscillator periods. These counters change states respectively before and after the dual thermometer code turn-overs. Only one reading is chosen for recording as determined by the most significant bit of the fine code. The choice will always find an accurate and stable reading, and reject erroneous readings resulting from reading a counter in transition. The chosen counter reading, encoded to binary, forms the coarse timer for the binary word representation of the event time. The coarse and fine binary words are butt-joinable to form the complete binary timing representation without further arithmetic processing.

9. 发明授权

US07489409B2 System for sensing an absolute position in two dimensions using a target pattern 失效
标题翻译：用于使用目标图案感测二维绝对位置的系统
公开(公告)号：US07489409B2
公开(公告)日：2009-02-10
申请号：US11753508
申请日：2007-05-24
申请人： David C. Chu , Evan R. Whitney
发明人： David C. Chu , Evan R. Whitney
IPC分类号： G01B11/14
CPC分类号： G01B11/002 , G01D5/34792 , G06F3/0321 , G06F3/0346
摘要： A system for sensing an absolute two-dimensional position of an object having a two-dimensional target pattern thereon comprises a sensor and a controller. The sensor is for capturing an image of a subset of the target pattern. The controller is for generating a first image vector representing summations of rows of pixel values from the image, and a second image vector representing summations of columns of pixel values from the image. The controller is configured to determine an absolute two-dimensional position of the subset of the target pattern with respect to the origin of the target pattern based on the first image vector, the second image vector and target vectors that represent the target pattern.
摘要翻译：用于感测具有二维目标图案的物体的绝对二维位置的系统包括传感器和控制器。传感器用于捕获目标图案子集的图像。所述控制器用于产生表示来自所述图像的像素值行的和的第一图像向量，以及表示来自所述图像的像素值的列的和的第二图像向量。控制器被配置为基于第一图像矢量，第二图像矢量和表示目标图案的目标矢量来确定目标图案的子集相对于目标图案的原点的绝对二维位置。

10. 发明授权

US07230727B2 System for sensing an absolute position in two dimensions using a target pattern 失效
标题翻译：用于使用目标图案感测二维绝对位置的系统
公开(公告)号：US07230727B2
公开(公告)日：2007-06-12
申请号：US11112623
申请日：2005-04-22
申请人： David C. Chu , Evan R. Whitney
发明人： David C. Chu , Evan R. Whitney
IPC分类号： G01B11/14
CPC分类号： G01B11/002 , G01D5/34792 , G06F3/0321 , G06F3/0346
摘要： A system for sensing an absolute position in two dimensions includes a target having a two-dimensional target pattern. A sensor captures an image of a first subset of the target pattern. A controller generates a first image vector representing summations of rows of pixel values from the image, and a second image vector representing summations of columns of pixel values from the image. The controller is configured to determine an absolute two-dimensional position of the first subset with respect to an origin of the target pattern based on the first and the second image vectors and a plurality of target vectors that represent the target pattern.
摘要翻译：用于感测二维绝对位置的系统包括具有二维目标图案的目标。传感器捕获目标图案的第一子集的图像。控制器生成表示来自图像的像素值行的和的第一图像矢量，以及表示来自图像的像素值的列的和的第二图像矢量。控制器被配置为基于第一和第二图像矢量以及表示目标图案的多个目标矢量来确定第一子集相对于目标图案的原点的绝对二维位置。

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