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1. 发明授权

US07187765B2 Method of capturing constant echo path information in a full duplex speakerphone using default coefficients 有权
标题翻译：使用默认系数在全双工免提电话机中捕获恒定回波路径信息的方法
公开(公告)号：US07187765B2
公开(公告)日：2007-03-06
申请号：US10722472
申请日：2003-11-28
申请人： Mirjana Popovic , Xin Xu
发明人： Mirjana Popovic , Xin Xu
IPC分类号： H04B3/23
CPC分类号： H04M9/082
摘要： A method of determining when to save default coefficients in an echo canceller so as to ensure that the capture of coefficients that correspond to the best possible echo cancellation in a current condition. Coefficients are saved at varying times depending on the amount of echo removed by the echo canceller. More particularly, the present method involves constantly monitoring the error signal to the echo canceller and comparing it with the error signal that would be obtained if default coefficients were to be used instead of the current coefficients. This ensures that the default coefficients are upgraded each time the current set of coefficients is better than the saved default coefficients.
摘要翻译：确定何时在回波消除器中保存默认系数的方法，以便确保在当前条件下对应于最佳可能的回波消除的系数的捕获。系数根据回波消除器所消除的回波量在不同时间被保存。更具体地说，本方法包括不断监测回波消除器的误差信号，并将其与将要使用的缺省系数代替当前系数将获得的误差信号进行比较。这确保了每当系数的当前系数优于保存的默认系数时，默认系数被升级。

2. 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。

3. 发明授权

US07212628B2 Echo cancellation/suppression and double-talk detection in communication paths 有权
标题翻译：通信路径中的回声消除/抑制和双向通话检测
公开(公告)号：US07212628B2
公开(公告)日：2007-05-01
申请号：US10765465
申请日：2004-01-26
申请人： Mirjana Popovic , Dieter Schultz
发明人： Mirjana Popovic , Dieter Schultz
IPC分类号： H04M9/08
CPC分类号： H04M9/082 , H04B3/23 , H04B3/234
摘要： A method of suppressing an echo signal in a communication path such as acoustic coupling between a speaker and a microphone in a telephone device handset includes the steps of monitoring a transmitted signal supplied to the communication path to determine an attribute thereof; generating a leaky mask based on the determined attribute and an attribute of a received echo signal; and partially cancelling the received echo signal using the leaky mask.
摘要翻译：抑制电话设备手机中的扬声器和麦克风之间的通信路径中的回声信号的方法包括以下步骤：监视提供给通信路径的发送信号以确定其属性; 基于所确定的属性和接收的回波信号的属性生成泄漏掩模; 并使用泄露掩模部分地消除所接收的回波信号。

4. 发明授权

US07508931B2 Method for detecting echo path changes in echo cancellers 有权
标题翻译：回波消除器回波路径变化检测方法
公开(公告)号：US07508931B2
公开(公告)日：2009-03-24
申请号：US11045743
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： H04B3/234
摘要： A method for detecting echo path changes in an echo canceller using the statistics of the echo canceling behavior (i.e. signal and performance information), to distinguish between new line and double talk conditions. A moving counter is incremented or decremented based on monitored levels of ERL (Echo Return Loss), ERLE (Echo Return Loss Enhancement), noise and signal energies. When the counter reaches a predetermined threshold value indicative of sustained poor echo cancellation performance, a determination is made that there is a probable new line condition (i.e. echo path change). This echo path change information is then passed to the echo canceller to enable re-convergence.
摘要翻译：使用回波消除行为（即信号和性能信息）的统计来检测回波消除器中的回波路径变化的方法，以区分新的线路和双向通话条件。基于ERL（回波回波损耗），ERLE（回波回波损耗增强），噪声和信号能量的监测电平，移动计数器递增或递减。当计数器达到指示持续较差的回波消除性能的预定阈值时，确定存在可能的新线路条件（即回波路径改变）。然后将该回波路径改变信息传递给回波消除器以实现再收敛。

5. 发明申请

US20050169457A1 Method for detecting echo path changes in echo cancellers 有权
标题翻译：回波消除器回波路径变化检测方法
公开(公告)号：US20050169457A1
公开(公告)日：2005-08-04
申请号：US11045743
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： H04B3/23 , H04M9/08
CPC分类号： H04B3/234
摘要： A method for detecting echo path changes in an echo canceller using the statistics of the echo canceling behavior (i.e. signal and performance information), to distinguish between new line and double talk conditions. A moving counter is incremented or decremented based on monitored levels of ERL (Echo Return Loss), ERLE (Echo Return Loss Enhancement), noise and signal energies. When the counter reaches a predetermined threshold value indicative of sustained poor echo cancellation performance, a determination is made that there is a probable new line condition (i.e. echo path change). This echo path change information is then passed to the echo canceller to enable re-convergence.
摘要翻译：使用回波消除行为（即信号和性能信息）的统计来检测回波消除器中的回波路径变化的方法，以区分新的线路和双向通话条件。基于ERL（回波回波损耗），ERLE（回波回波损耗增强），噪声和信号能量的监测电平，移动计数器递增或递减。当计数器达到指示持续较差的回波消除性能的预定阈值时，确定存在可能的新线路条件（即回波路径改变）。然后将该回波路径改变信息传递给回波消除器以实现再收敛。

6. 发明申请

US20150030168A1 Dynamic Characterization of a Communication Device 有权
标题翻译：通信设备的动态特性
公开(公告)号：US20150030168A1
公开(公告)日：2015-01-29
申请号：US13948940
申请日：2013-07-23
申请人： Dieter Schulz , Mirjana Popovic , Chi Keung Leung , Edward P. Gancarcik
发明人： Dieter Schulz , Mirjana Popovic , Chi Keung Leung , Edward P. Gancarcik
IPC分类号： H04R29/00
CPC分类号： H04R29/001 , H04M9/082 , H04R3/04 , H04R2430/03
摘要： Technology for dynamic characterization of a communication device is disclosed. One method comprises sending an acoustic characterization excitation signal to be output by an acoustic transducer in the communication device. A received acoustic coupling signal that is received by a microphone of the communication device in response to the output of the acoustic transducer is measured. An acoustic signal conditioning algorithm is applied to at least one of the microphone or the acoustic transducer to reduce an amplitude of the acoustic signal or the received acoustic coupling signal to a level below a selected threshold.
摘要翻译：公开了用于通信设备的动态表征的技术。一种方法包括发送由通信装置中的声换能器输出的声表征激励信号。测量响应于声换能器的输出的由通信装置的麦克风接收的接收的声耦合信号。将声信号调节算法应用于麦克风或声换能器中的至少一个，以将声信号或接收到的声耦合信号的振幅降低到低于选定阈值的水平。

7. 发明申请

US20070127697A1 METHOD FOR SELECTING IMPEDANCE SETTING FOR LOOP START TRUNK LINE 有权
标题翻译：选择环路启动TRUNK线路阻抗设置的方法
公开(公告)号：US20070127697A1
公开(公告)日：2007-06-07
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： H04M3/00 , H04M7/00 , H04M1/00
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。

8. 发明申请

US20060198329A1 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：US20060198329A1
公开(公告)日：2006-09-07
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： H04B3/20 , 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。

9. 发明授权

US06947395B1 Locating network echos 有权
标题翻译：查找网络回波
公开(公告)号：US06947395B1
公开(公告)日：2005-09-20
申请号：US09662259
申请日：2000-09-14
申请人： Mirjana Popovic , Dieter Schulz
发明人： Mirjana Popovic , Dieter Schulz
IPC分类号： H04B3/23 , H04B3/20
CPC分类号： H04B3/23
摘要： An echo cancelling system for cancelling echoes in a communication path includes an echo locator and an echo canceller. The echo locator is coupled to the communication path and locates the positions of echo signals received from the communication path. The echo canceller is also coupled to the communication path and cancels echo signals received therefrom. During echo cancellation, the echo canceller becomes active in regions corresponding to the positions of echo signals in response to the echo locator.
摘要翻译：用于消除通信路径中的回波的回波消除系统包括回波定位器和回波消除器。回波定位器耦合到通信路径并且定位从通信路径接收的回波信号的位置。回波消除器还耦合到通信路径并且消除从其接收的回波信号。在回波消除期间，响应于回波定位器，回波消除器在对应于回波信号的位置的区域中变得活跃。

10. 发明授权

US09544702B2 Dynamic characterization of a communication device 有权
标题翻译：通信设备的动态特性
公开(公告)号：US09544702B2
公开(公告)日：2017-01-10
申请号：US13948940
申请日：2013-07-23
申请人： Dieter Schulz , Mirjana Popovic , Chi Keung Leung , Edward P. Gancarcik
发明人： Dieter Schulz , Mirjana Popovic , Chi Keung Leung , Edward P. Gancarcik
IPC分类号： H04R29/00 , H04M9/08 , H04R3/04
CPC分类号： H04R29/001 , H04M9/082 , H04R3/04 , H04R2430/03
摘要： Technology for dynamic characterization of a communication device is disclosed. One method comprises sending an acoustic characterization excitation signal to be output by an acoustic transducer in the communication device. A received acoustic coupling signal that is received by a microphone of the communication device in response to the output of the acoustic transducer is measured. An acoustic signal conditioning algorithm is applied to at least one of the microphone or the acoustic transducer to reduce an amplitude of the acoustic signal or the received acoustic coupling signal to a level below a selected threshold.
摘要翻译：公开了用于通信设备的动态表征的技术。一种方法包括发送由通信装置中的声换能器输出的声表征激励信号。测量响应于声换能器的输出的由通信装置的麦克风接收的接收的声耦合信号。将声信号调节算法应用于麦克风或声换能器中的至少一个，以将声信号或接收到的声耦合信号的振幅降低到低于选定阈值的水平。

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