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1. 发明授权

US07590250B2 Analog audio signal enhancement system using a noise suppression algorithm 失效
标题翻译：模拟音频信号增强系统采用噪声抑制算法
公开(公告)号：US07590250B2
公开(公告)日：2009-09-15
申请号：US10394783
申请日：2003-03-21
申请人： Richard Thompson Ellis , Heejong Yoo , David Wilson Graham , Paul Edward Hasler , David V. Anderson
发明人： Richard Thompson Ellis , Heejong Yoo , David Wilson Graham , Paul Edward Hasler , David V. Anderson
IPC分类号： H04B15/00
CPC分类号： H03G5/165 , G10L19/0204 , G10L21/0208 , G10L21/0232 , H03H21/0001 , H04B15/00
摘要： One preferred embodiment of the present invention provides systems and methods for removing noise from an input analog signal in continues time. Briefly described in architecture, one embodiment of the system, among others, can be implemented as follows. An analog filtering system including VLSI circuitry separates an analog input signal into a plurality of sub-band signals. Then, an analog gain system including VLSI circuitry calculates a gain for each sub-band signal that suppresses the noise within the sub-band signal. In some preferred embodiments, VLSI circuitry includes floating gate technology. Methods and other systems are also provided.
摘要翻译：本发明的一个优选实施例提供了用于在连续时间内从输入模拟信号中去除噪声的系统和方法。在架构中简要描述，系统的一个实施例等可以如下实现。包括VLSI电路的模拟滤波系统将模拟输入信号分离成多个子带信号。然后，包括VLSI电路的模拟增益系统计算抑制子带信号内的噪声的每个子带信号的增益。在一些优选实施例中，VLSI电路包括浮动栅极技术。还提供了方法和其他系统。

2. 发明授权

US06351731B1 Adaptive filter featuring spectral gain smoothing and variable noise multiplier for noise reduction, and method therefor 失效
标题翻译：具有频谱增益平滑和噪声减少的可变噪声乘数的自适应滤波器及其方法
公开(公告)号：US06351731B1
公开(公告)日：2002-02-26
申请号：US09371306
申请日：1999-08-10
申请人： David V. Anderson , Stephen McGrath , Kwan Truong
发明人： David V. Anderson , Stephen McGrath , Kwan Truong
IPC分类号： G10L1102
CPC分类号： G10L21/0208
摘要： An adaptive filter is provided featuring a speech spectrum estimator receiving as input an estimated spectral magnitude signal for a time frame of the input signal and generating an estimated speech spectral magnitude signal representing estimated spectral magnitude values for speech in a time frame. A spectral gain generator receives as input the estimated spectral magnitude signal and the estimated speech spectral magnitude signal and generates as output an initial spectral gain signal that yields an estimate of speech spectrum in a time frame of the input signal when the initial spectral gain signal is applied to the spectral signal. A spectral gain modifier receives as input the initial spectral gain signal and generates a modified gain signal by limiting a rate of change of the initial spectral gain signal with respect to the spectral gain over a number of previous time frames. The modified gain signal is then applied to the spectral signal, which is then converted to its time domain equivalent. The value of the noise multiplier is larger when a time frame of the input signal contains more noise than speech and is smaller when a time frame of the input signal contains more speech than noise.
摘要翻译：提供了一种自适应滤波器，其特征在于语音频谱估计器接收输入信号的时间帧的估计频谱幅度信号作为输入，并且生成表示在时间帧内用于语音的估计频谱幅度值的估计语音频谱幅度信号。频谱增益发生器接收估计的频谱幅度信号和估计的语音频谱幅度信号作为输入，并产生作为输出的初始频谱增益信号，该初始频谱增益信号在初始频谱增益信号是时为输入信号的时间帧中产生语音频谱的估计应用于光谱信号。频谱增益修改器接收初始频谱增益信号作为输入，并且通过在多个先前时间帧上相对于频谱增益限制初始频谱增益信号的变化速率来产生修改的增益信号。然后将修改的增益信号应用于频谱信号，然后将其转换为其时域等效。当输入信号的时间帧包含比语音更多的噪声时，噪声乘数的值较大，并且当输入信号的时间帧包含比噪声更多的语音时，噪声乘数的值较小。

3. 发明申请

US20120159122A1 SYSTEMS AND METHODS FOR LATTICE REDUCTION 有权
标题翻译：减少系统和方法
公开(公告)号：US20120159122A1
公开(公告)日：2012-06-21
申请号：US12943824
申请日：2010-11-10
申请人： David V. Anderson , Brian Gestner , Xiaoli Ma , Wei Zhang
发明人： David V. Anderson , Brian Gestner , Xiaoli Ma , Wei Zhang
IPC分类号： H04B7/02 , G06F15/76
CPC分类号： H04B7/0854
摘要： Disclosed herein are lattice reduction systems and methods for a MIMO communication system. One such method includes providing a channel matrix corresponding to a channel in a MIMO communication system, preprocessing the channel matrix to form at least an upper triangular matrix, implementing a relaxed size reduction process, and implementing a basis update process. Implementing the relaxed size reduction process comprises choosing a first relaxed size reduction parameter for a first-off-diagonal element of the upper triangular matrix, choosing a second relaxed size reduction parameter, which is greater than the first relaxed size reduction parameter, for a second-off-diagonal element of the upper triangular matrix evaluating whether a first relaxed size reduction condition is satisfied for the first-off-diagonal element of the upper triangular matrix, and evaluating whether a second relaxed size reduction condition is satisfied for the second-off-diagonal element of the upper triangular matrix.
摘要翻译：这里公开了用于MIMO通信系统的晶格简化系统和方法。一种这样的方法包括提供与MIMO通信系统中的信道相对应的信道矩阵，预处理信道矩阵以形成至少上三角矩阵，实现松弛尺寸减小过程，以及实现基本更新过程。实现松弛尺寸减小过程包括为上三角矩阵选择第一松弛尺寸缩小参数，为第二松弛尺寸选择大于第一松弛尺寸减小参数的第二松弛尺寸减小参数评估上三角矩阵的第一对角线元素是否满足第一松弛尺寸缩小条件，以及评估第二松弛尺寸缩小条件是否满足二次关系的上三角矩阵的非对角线元素上三角矩阵的方形元素。

4. 发明申请

US20080267740A1 BALE HANDLING VEHICLE 有权
标题翻译： BALE处理车
公开(公告)号：US20080267740A1
公开(公告)日：2008-10-30
申请号：US12107189
申请日：2008-04-22
申请人： David V. Anderson
发明人： David V. Anderson
IPC分类号： A01D90/08
CPC分类号： A01D90/08 , A01D85/005
摘要： A bale handling vehicle includes a wheeled chassis having a cab, a frame, a plurality of wheels, and a bale handling system attached to the frame. The bale handling system includes a base frame, a bale gripper structure at the front of the vehicle for picking up bales, a first platform above the vehicle cab for receiving bales from the bale gripper structure, and a second platform positioned behind the first platform. The second platform includes a movable portion that can be raised to a vertical position for stacking the bales. The first platform is movable between a lowered position for receiving the bales from the bale gripper structure, and a raised position for causing the bales to slide rearwardly onto the second platform. Intermediate stop members are movable to selectively block the bales from sliding onto the movable portion of the second platform.
摘要翻译：捆包处理车辆包括具有驾驶室，框架，多个轮子和附接到框架的捆包处理系统的轮式底盘。捆包处理系统包括基架，位于车辆前方的拾取捆包结构，用于拾起捆包，在车辆驾驶室上方的第一平台，用于从捆包夹结构接收捆包，以及定位在第一平台后面的第二平台。第二平台包括可升高到用于堆叠捆的垂直位置的可移动部分。第一平台可在用于从捆包夹结构接收捆包的下降位置和用于使捆包向后滑动到第二平台上的升高位置之间移动。中间止动件可移动以选择性地阻止捆包滑动到第二平台的可移动部分上。

5. 发明申请

US20110188671A1 ADAPTIVE GAIN CONTROL BASED ON SIGNAL-TO-NOISE RATIO FOR NOISE SUPPRESSION 审中-公开
标题翻译：基于噪声抑制的信噪比自适应增益控制
公开(公告)号：US20110188671A1
公开(公告)日：2011-08-04
申请号：US12905794
申请日：2010-10-15
申请人： David V. Anderson , Devangi N. Parikh , Sourabh Ravindran
发明人： David V. Anderson , Devangi N. Parikh , Sourabh Ravindran
IPC分类号： H04B15/00
CPC分类号： H04B15/00
摘要： Systems and methods for suppressing noise in a signal are disclosed herein. In exemplary embodiments of the present invention, noise is suppressed using perceptual adaptive gain control based on signal-to-noise ratios. In other embodiment of the present invention, the gain of a signal is mapped as a function of an active estimate of the envelope of the signal.
摘要翻译：本文公开了抑制信号中的噪声的系统和方法。在本发明的示例性实施例中，使用基于信噪比的感知自适应增益控制来抑制噪声。在本发明的其他实施例中，信号的增益被映射为信号包络的有效估计的函数。

6. 发明授权

US06898097B2 Floating-gate analog circuit 失效
标题翻译：浮栅模拟电路
公开(公告)号：US06898097B2
公开(公告)日：2005-05-24
申请号：US10397021
申请日：2003-03-24
申请人： Jeffery Don Dugger , Tyson S. Hall , Paul Hasler , David V. Anderson , Paul D. Smith , Matthew Raymond Kucic , Abhishek Bandyopadhyay
发明人： Jeffery Don Dugger , Tyson S. Hall , Paul Hasler , David V. Anderson , Paul D. Smith , Matthew Raymond Kucic , Abhishek Bandyopadhyay
IPC分类号： G11C27/00 , G06G7/12 , H01L21/82 , H01L21/8247 , H01L27/115 , H01L29/76 , H01L29/788 , H01L29/792 , H03F1/32 , H03F3/08 , H03F3/45 , H03K19/177 , H04L20060101
CPC分类号： G11C27/005 , G06G7/12 , H03F1/3211 , H03F1/3241 , H03F3/082 , H03F3/45183 , H03F2200/174 , H03F2203/45121 , H03K19/17732 , H03K19/1776 , H03K19/1778
摘要： In one exemplary embodiment, a programmable analog array (PAA) contains a configurable analog matrix having two floating-gate field effect transistors (FETs). Also contained in the PAA is an interconnect circuit that is programmable to configure the configurable analog matrix to operate in one or more of several matrix modes. A few examples of such matrix modes include a switching matrix mode, a memory matrix mode, and a computing matrix mode. In an exemplary method of configuring the PAA. PAA, the the method includes programming an interconnection, for example, between a first terminal of the first floating-gate FET and a first terminal of the second floating-gate FET. The method further includes programming an interconnection, for example, between a gate terminal of the first floating-gate FET and a fixed voltage source, for setting a floating gate charge on the first floating-gate FET.
摘要翻译：在一个示例性实施例中，可编程模拟阵列（PAA）包含具有两个浮栅场效应晶体管（FET）的可配置模拟矩阵。还包含在PAA中的是互连电路，其可编程以配置可配置的模拟矩阵以在一个或多个矩阵模式中操作。这种矩阵模式的几个示例包括开关矩阵模式，存储矩阵模式和计算矩阵模式。在配置PAA的示例性方法中。 PAA，该方法包括对例如第一浮栅FET的第一端和第二浮栅FET的第一端之间的互连进行编程。该方法还包括例如在第一浮栅FET的栅极端和固定电压源之间编程互连，用于在第一浮栅FET上设置浮置栅极电荷。

7. 发明授权

US07034603B2 Floating-gate reference circuit 有权
标题翻译：浮栅参考电路
公开(公告)号：US07034603B2
公开(公告)日：2006-04-25
申请号：US10446087
申请日：2003-05-27
申请人： Philomena Cleopha Brady , Haw-Jing Lo , Guillermo José Serrano , Farhan Adil , Matthew Raymond Kucic , Paul Edward Hasler , David V. Anderson , Angelo W. Pereira
发明人： Philomena Cleopha Brady , Haw-Jing Lo , Guillermo José Serrano , Farhan Adil , Matthew Raymond Kucic , Paul Edward Hasler , David V. Anderson , Angelo W. Pereira
IPC分类号： G05F1/10
CPC分类号： G11C7/14 , G11C27/005 , H03M1/1057 , H03M1/36 , H03M1/74 , H03M3/386 , H03M3/45 , H03M3/454
摘要： Systems and methods are discussed for using a floating-gate MOSFET as a programmable reference circuit. One example of the programmable reference circuit is a programmable voltage reference source, while a second example of a programmable reference circuit is a programmable reference current source. The programmable voltage reference source and/or the reference current source may be incorporated into several types of circuits, such as comparator circuits, current-mirror circuits, and converter circuits. Comparator circuits and current-mirror circuits are often incorporated into circuits such as converter circuits. Converter circuits include analog-to-digital converters and digital-to-analog converters.
摘要翻译：讨论了使用浮栅MOSFET作为可编程参考电路的系统和方法。可编程参考电路的一个示例是可编程参考电压源，而可编程参考电路的第二示例是可编程参考电流源。可编程电压参考源和/或参考电流源可以并入几种类型的电路中，例如比较器电路，电流镜电路和转换器电路。比较器电路和电流镜电路通常被并入诸如转换器电路的电路中。转换器电路包括模数转换器和数模转换器。

8. 发明授权

US06453285B1 Speech activity detector for use in noise reduction system, and methods therefor 有权
标题翻译：用于降噪系统的语音活动检测器及其方法
公开(公告)号：US06453285B1
公开(公告)日：2002-09-17
申请号：US09371748
申请日：1999-08-10
申请人： David V. Anderson , Stephen McGrath , Kwan Truong
发明人： David V. Anderson , Stephen McGrath , Kwan Truong
IPC分类号： G10L1102
CPC分类号： G10L25/78 , G10L21/0208
摘要： A system and method for removing noise from a signal containing speech (or a related, information carrying signal) and noise. A speech or voice activity detector (VAD) is provided for detecting whether speech signals are present in individual time frames of an input signal. The VAD comprises a speech detector that receives as input the input signal and examines the input signal in order to generate a plurality of statistics that represent characteristics indicative of the presence or absence of speech in a time frame of the input signal, and generates an output based on the plurality of statistics representing a likelihood of speech presence in a current time frame; and a state machine coupled to the speech detector and having a plurality of states. The state machine receives as input the output of the speech detector and transitions between the plurality of states based on a state at a previous time frame and the output of the speech detector for the current time frame. The state machine generates as output a speech activity status signal based on the state of the state machine, which provides a measure of the likelihood of speech being present during the current time frame. The VAD may be used in a noise reduction system.
摘要翻译：一种用于从包含语音（或相关的信息携带信号）和噪声的信号中去除噪声的系统和方法。提供语音或语音活动检测器（VAD），用于检测语音信号是否存在于输入信号的各个时间帧中。 VAD包括语音检测器，其接收输入信号作为输入并检查输入信号，以便生成表示在输入信号的时间帧中表示语音的存在或不存在的特征的多个统计量，并且生成输出基于表示当前时间帧中的语音存在的可能性的多个统计信息; 以及耦合到语音检测器并具有多个状态的状态机。状态机基于前一帧的状态和当前时间帧的语音检测器的输出，接收语音检测器的输出并在多个状态之间转换。状态机基于状态机的状态产生语音活动状态信号作为输出，该状态机提供在当前时间帧期间存在语音的可能性的量度。 VAD可用于降噪系统。

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