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1. 发明授权

US08654967B2 System for conditioning echo response of loop start trunk line 有权
标题翻译：循环启动干线回波响应调节系统
公开(公告)号：US08654967B2
公开(公告)日：2014-02-18
申请号：US11608470
申请日：2006-12-08
申请人： Dieter Schulz , Yonghua Fang , Renee Johnston , Mirjana Popovic
发明人： Dieter Schulz , Yonghua Fang , Renee Johnston , Mirjana Popovic
IPC分类号： H04M9/08
CPC分类号： H04B3/23 , H04B3/493
摘要： An echo canceling system has an adaptive filter connected to an echo source, for canceling echo from an echo path. A fixed echo conditioning filter is connected in series with the adaptive filter, intermediate the echo source and the adaptive filter. The fixed echo conditioning filter cancels the constant part of the echo path using a measured impulse response of the echo path.
摘要翻译：回波消除系统具有连接到回波源的自适应滤波器，用于从回波路径消除回波。固定回波调理滤波器与自适应滤波器串联连接，在回波源和自适应滤波器之间。固定回波调理滤波器使用测量的回波路径的脉冲响应来消除回波路径的恒定部分。

2. 发明申请

US20070071230A1 Distributed echo cancelling 审中-公开
标题翻译：分布式回波消除
公开(公告)号：US20070071230A1
公开(公告)日：2007-03-29
申请号：US11476926
申请日：2006-06-28
申请人： Dieter Schulz
发明人： Dieter Schulz
IPC分类号： H04M9/08 , H04B3/20
CPC分类号： H04B3/23 , H04M9/082
摘要： A distributed echo cancelling architecture is provided where echo-cancelling functions are performed at locations remote from devices receiving signals with echoes. The echo cancelling functions use a reference signal, which has been corrupted with the echoes at the devices, for echo cancellation. As echo canceller resources are located at a central system and not at each individual device, the echo canceller resources can therefore be shared between the devices.
摘要翻译：提供分布式回波消除架构，其中在远离装置接收具有回波信号的设备的位置处执行回波消除功能。回波消除功能使用已被设备回波损坏的参考信号用于回波消除。由于回波消除器资源位于中央系统而不是在每个单独设备处，因此可以在设备之间共享回波消除器资源。

3. 发明授权

US07010117B2 Multi-frequency tone detector 有权
标题翻译：多频音检测器
公开(公告)号：US07010117B2
公开(公告)日：2006-03-07
申请号：US09808684
申请日：2001-03-15
申请人： Dieter Schulz
发明人： Dieter Schulz
IPC分类号： H04M1/00 , H04M3/00
CPC分类号： H04Q1/46
摘要： A multi-frequency tone detector with analysis window (i.e. filter size) chosen such that spectral nulls are located at adjacent frequencies of interest. The decision logic block of the tone detector uses the roll-off characteristics of the filter in conjunction with background noise to determine a threshold pass/fail for any tone that has deviated excessively from its nominal value. The foregoing aspects of the invention result in simple filter design (i.e. reduced order) relative to prior art tone detectors.
摘要翻译：选择具有分析窗口（即，滤波器尺寸）的多频率音调检测器，使得频谱零点位于感兴趣的相邻频率处。音调检测器的判定逻辑块结合背景噪声使用滤波器的滚降特性来确定任何偏离其标称值的音调的阈值通过/失败。本发明的前述方面导致相对于现有技术的音调检测器的简单的滤波器设计（即，降序）。

4. 发明申请

US20050084116A1 Detecting acoustic echoes using microphone arrays 有权
标题翻译：使用麦克风阵列检测声学回声
公开(公告)号：US20050084116A1
公开(公告)日：2005-04-21
申请号：US10971213
申请日：2004-10-21
申请人： Dieter Schulz , Graham Thompson , Charn Lo , Rafik Goubran
发明人： Dieter Schulz , Graham Thompson , Charn Lo , Rafik Goubran
IPC分类号： H04R3/00 , H04R1/02
CPC分类号： G01S3/8083 , H04R3/005 , H04R2201/401 , H04R2430/23
摘要： A method is provided for discriminating between the case of a single talker with an acoustic reflection and the case of two talkers, regardless of their power levels. The method is implemented in real time by performing a cross-correlation between pairs of average power signals originating from pairs of beamformers. A detection decision is then made based on the value of the cross correlation and its lag.
摘要翻译：提供了一种用于区分单个讲话者与声反射的情况和两个讲话者的情况的方法，而不管其功率水平如何。该方法通过执行源于波束形成器对的平均功率信号对之间的互相关来实时实现。然后根据互相关值及其滞后值进行检测决定。

5. 外观设计

USD340213S Motorcycle 失效
公开(公告)号：USD340213S
公开(公告)日：1993-10-12
申请号：US660572
申请日：1991-02-21
申请人： Wolfgang Bende , Josef Jauernik , Rolf Mahling , Dieter Schulz
设计人： Wolfgang Bende , Josef Jauernik , Rolf Mahling , Dieter Schulz

6. 发明申请

US20130156204A1 Visual feedback of audio input levels 审中-公开
标题翻译：音频输入电平的视觉反馈
公开(公告)号：US20130156204A1
公开(公告)日：2013-06-20
申请号：US13374153
申请日：2011-12-14
申请人： Dieter Schulz
发明人： Dieter Schulz
IPC分类号： H04R29/00
CPC分类号： H04M3/569 , H04M2203/256
摘要： The present disclosure relates to a conferencing appliance. More specifically, this disclosure relates to visual feedback of audio input levels. In one illustrative embodiment, a ring-shaped indicator can be provided on a conferencing appliance. When an audio stream is received, the audio stream can be filtered by removing echoes and background noises. The appliance can determine the power level of the audio stream. The appliance can then activate the ring-shaped indicator showing the calculated power level of the audio stream. Different colors can be used showing the power level of the audio stream. Light intensity can also be used to indicate the power level of the incoming audio. The indicator can be placed on a standard telephone.
摘要翻译：本公开涉及一种会议设备。更具体地，本公开涉及音频输入电平的视觉反馈。在一个说明性实施例中，可以在会议设备上提供环形指示器。当接收到音频流时，可以通过去除回波和背景噪声来过滤音频流。设备可以确定音频流的功率级别。然后，设备可以激活表示音频流的计算功率电平的环形指示器。可以使用不同的颜色来显示音频流的功率级别。光强也可用于指示输入音频的功率电平。指示灯可以放在标准电话机上。

7. 发明授权

US07817797B2 Method and apparatus for detecting echo path changes in an acoustic echo canceller 有权
标题翻译：用于检测声学回波消除器中的回波路径变化的方法和装置
公开(公告)号：US07817797B2
公开(公告)日：2010-10-19
申请号：US11422747
申请日：2006-06-07
申请人： Mirjana Popovic , Dieter Schulz , Dean Swan , Andrew Wu
发明人： Mirjana Popovic , Dieter Schulz , Dean Swan , Andrew Wu
IPC分类号： H04M9/08
CPC分类号： H04B3/237 , H04B3/234
摘要： An echo canceller comprising a first adaptive filter having N_long coefficients for converging to an echo path, a non-adaptive filter representing a direct echo path portion captured by the first adaptive filter and having N_short default coefficients, where N_long>N_short, for quick convergence of the echo canceller at start-up, wherein the default coefficients are replaced by the first N_short coefficients from the first adaptive filter responsive to an improvement in echo return loss enhancement (ERLE) of the first adaptive filter, a second adaptive filter having N_short default coefficients for modeling the direct echo path and providing an indication of double-talk and echo path changes, decision logic for receiving error signal outputs from the first and second adaptive filters and the non-adaptive filter and in response distinguishing between echo path changes and double-talk, and a non-linear processor for attenuating signals responsive to input from the decision logic.
摘要翻译：一种回波消除器，包括具有用于收敛到回波路径的N_long系数的第一自适应滤波器，表示由第一自适应滤波器捕获的直接回波路径部分并具有N_short默认系数的非自适应滤波器，其中N_long> N_short用于快速收敛响应于所述第一自适应滤波器的回波回波损耗增强（ERLE）的改善，所述默认系数被来自所述第一自适应滤波器的所述第一N_short系数替换，所述第二自适应滤波器具有N_short默认系数用于对直接回波路径进行建模并提供双向通话和回波路径变化的指示，用于从第一和第二自适应滤波器和非自适应滤波器接收误差信号输出的判定逻辑，并且响应于区分回波路径变化和双向通信，以及响应于来自决策逻辑的输入衰减信号的非线性处理器。

8. 发明授权

US07792280B2 Narrow band tone detection in echo canceling system 有权
标题翻译：回波消除系统中的窄带音检测
公开(公告)号：US07792280B2
公开(公告)日：2010-09-07
申请号：US11045825
申请日：2005-01-27
申请人： Renee Johnston , Mirjana Popovic , Dieter Schulz , Jan Radecki
发明人： Renee Johnston , Mirjana Popovic , Dieter Schulz , Jan Radecki
IPC分类号： H04M9/08
CPC分类号： H04B3/23 , H04Q1/4575
摘要： The present invention relates generally to tone detection in echo canceling systems, and more particularly to a method of monitoring oscillations of adaptive filter coefficients for narrow band tone detection in echo cancellation systems. The invention is directed at improving communication in a telephone communication network having one or more hybrid connections. A method for detecting continuous tones in an echo canceling system having an adaptive filter is provided. Continuous tones have a deleterious effect on the performance of adaptive filters. In the present invention, the adaptive filter coefficients are monitored. Oscillation of those coefficients indicates continuous tone presence.
摘要翻译：本发明一般涉及回波消除系统中的音调检测，更具体地说，涉及一种监测回波消除系统中的窄带音检测的自适应滤波器系数的振荡的方法。本发明旨在改进具有一个或多个混合连接的电话通信网络中的通信。提供一种用于在具有自适应滤波器的回波消除系统中检测连续音调的方法。连续色调对自适应滤波器的性能有不利影响。在本发明中，监视自适应滤波器系数。这些系数的振荡表示连续色调存在。

9. 发明授权

US07738653B2 Method for selecting impedance setting for loop start trunk line 有权
标题翻译：选择环路起始干线阻抗设定方法
公开(公告)号：US07738653B2
公开(公告)日：2010-06-15
申请号：US11608177
申请日：2006-12-07
申请人： Yonghua Fang , Mirjana Popovic , Dieter Schulz
发明人： Yonghua Fang , Mirjana Popovic , Dieter Schulz
IPC分类号： H04M9/00
CPC分类号： H04M7/0096 , H04B3/493 , H04M3/002 , H04M3/28 , H04M3/42314 , H04M7/14
摘要： A method of selecting an optimum impedance for a loop start trunk line, comprising successively applying respective ones of a plurality of impedance settings to the loop start trunk line, for each impedance setting measuring the impulse response of the trans-hybrid echo path by applying audio test signals to obtain a time-domain trans-hybrid transfer function and deriving a frequency-domain spectrum representative of trans-hybrid loss, and then calculating figure of merit of the transfer function based on the power spectrum. Once all impedance settings have been tested, the optimum impedance is selected as the impedance setting associated with the highest calculated figure of merit.
摘要翻译：一种选择环路起始干线的最佳阻抗的方法，包括：针对每个通过应用音频测量跨混合回波路径的脉冲响应的阻抗设置，将多个阻抗设置中的相应的阻抗设置连续地应用于环路起始干线测试信号以获得时域跨混合传递函数并导出代表跨混合损耗的频域频谱，然后基于功率谱计算传递函数的品质因数。一旦所有的阻抗设置都被测试，最佳阻抗被选择为与最高计算品质因数相关联的阻抗设置。

10. 发明授权

US07693276B2 Method of measuring distortion and determining residue-echo threshold in loop start trunk circuits 有权
标题翻译：测量回路起始干线电路的失真和确定残留回波阈值的方法
公开(公告)号：US07693276B2
公开(公告)日：2010-04-06
申请号：US11351133
申请日：2006-02-09
申请人： Yonghua Fang , Renee Johnston , Mirjana Popovic , Dieter Schulz
发明人： Yonghua Fang , Renee Johnston , Mirjana Popovic , Dieter Schulz
IPC分类号： H04M9/08
CPC分类号： H04B3/23
摘要： A method of determining residue-echo threshold for the trans-hybrid echo path of a loop start (LS) trunk line, comprising the steps of estimating the impulse response of the trans-hybrid echo path, passing a speech-like signal through the LS trunk circuit and collecting the echo signal. The collected echo signal is compared to the convolution of the speech-like signal with the estimated impulse response. The difference between the convolution result and the collected echo signal is the residue echo, which represents the effect of nonlinearity. With different levels of excitation signal, a curve of residue echo power level against input signal level is obtained, and the distortion characteristics are derived from this curve.
摘要翻译：一种确定环路起始（LS）干线的跨混合回波路径的残余回波阈值的方法，包括以下步骤：估计跨混合回波路径的脉冲响应，将语音样信号通过LS 中继电路并收集回波信号。将收集的回波信号与语音样信号与估计的脉冲响应的卷积进行比较。卷积结果与收集的回波信号之间的差异是残差回波，表示非线性的影响。利用不同的激发信号，获得残留回波功率与输入信号电平的关系曲线，并从该曲线导出失真特性。

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