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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

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。

3. 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。

4. 发明授权

US07215762B2 Method of 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：US07215762B2
公开(公告)日：2007-05-08
申请号：US11060514
申请日：2005-02-16
申请人： Yonghua Fang , Mirjana Popovic , Dieter Schulz
发明人： Yonghua Fang , Mirjana Popovic , Dieter Schulz
IPC分类号： H04M7/04 , 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。

5. 发明申请

US20050207565A1 Method of 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：US20050207565A1
公开(公告)日：2005-09-22
申请号：US11060514
申请日：2005-02-16
申请人： Yonghua Fang , Mirjana Popovic , Dieter Schulz
发明人： Yonghua Fang , Mirjana Popovic , Dieter Schulz
IPC分类号： H04B1/58 , H04B3/20 , H04B3/46 , H04M3/00 , H04M3/28 , H04M7/00 , H04M7/14 , 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。

6. 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。

7. 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。

8. 发明申请

US20070133786A1 SYSTEM FOR CONDITIONING ECHO RESPONSE OF LOOP START TRUNK LINE 有权
标题翻译：用于调节环路启动TRUNK线的ECHO响应的系统
公开(公告)号：US20070133786A1
公开(公告)日：2007-06-14
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。

9. 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。

10. 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。

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