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。

公开(公告)号：US20070286404A1

公开(公告)日：2007-12-13

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，包括具有用于会聚到回波路径的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个短缺省系数的非自适应滤波器，其中N_long> N_short用于快速收敛 ，其中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，具有N个短的第二自适应滤波器 用于建模直接回波路径并提供双向通话和回波路径改变的指示的默认系数，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，并且响应区分回波路径变化和 双向通话以及响应于来自判定逻辑的输入衰减信号的非线性处理器。

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。

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。

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。

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。

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。

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。

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。

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。