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1. 发明授权

US08014519B2 Cross-correlation based echo canceller controllers 有权
标题翻译：基于互相关的回波消除器控制器
公开(公告)号：US08014519B2
公开(公告)日：2011-09-06
申请号：US11695426
申请日：2007-04-02
申请人： Asif Iqbal Mohammad , Jack W. Stokes, III , Steven L. Grant
发明人： Asif Iqbal Mohammad , Jack W. Stokes, III , Steven L. Grant
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Cross-correlation based echo canceller controllers are described herein. By way of example, a system for controlling an echo canceller having one or more adaptive filters can include one or more adaptive filter controllers each corresponding to one of the one or more adaptive filters and each configured to halt adaptation of its corresponding adaptive filter according to the cross-correlation of its corresponding corrupted signal and its corresponding error signal of its corresponding adaptive filter.
摘要翻译：本文描述了基于互相关的回声消除器控制器。作为示例，用于控制具有一个或多个自适应滤波器的回波消除器的系统可以包括一个或多个自适应滤波器控制器，每个自适应滤波器控制器对应于一个或多个自适应滤波器中的一个自适应滤波器，并且每个被配置为根据其相应的损坏信号的互相关及其对应的自适应滤波器的相应误差信号。

2. 发明授权

US08019075B2 Hybrid echo canceller controllers 有权
标题翻译：混合回波消除器控制器
公开(公告)号：US08019075B2
公开(公告)日：2011-09-13
申请号：US11695447
申请日：2007-04-02
申请人： Asif Iqbal Mohammad , Jack W. Stokes, III
发明人： Asif Iqbal Mohammad , Jack W. Stokes, III
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Hybrid echo canceller controllers are described herein. By way of example, a system for controlling an echo canceller can include a cross-correlator, a discriminator and an echo canceller controller. The cross-correlator can be configured to produce a cross-correlation based output that facilitates controlling the echo canceller by cross-correlating two signals associated with the echo canceller. The discriminator can be configured to produce a discriminator output that discriminates between near-end signal and echo in a corrupted signal. The echo canceller controller can be configured to control the echo canceller according to the cross-correlation based output and the discriminator output.
摘要翻译：本文描述了混合回波消除器控制器。作为示例，用于控制回波消除器的系统可以包括交叉相关器，鉴别器和回声消除器控制器。互相关器可以被配置为产生基于互相关的输出，其有助于通过将与回波消除器相关联的两个信号相互关联来控制回波消除器。鉴别器可以被配置为产生鉴别器输出，其鉴别受损信号中的近端信号和回波。回波消除器控制器可以被配置为根据基于互相关的输出和鉴别器输出来控制回波消除器。

3. 发明授权

US08103011B2 Signal detection using multiple detectors 有权
标题翻译：使用多个探测器进行信号检测
公开(公告)号：US08103011B2
公开(公告)日：2012-01-24
申请号：US11669549
申请日：2007-01-31
申请人： Asif Iqbal Mohammad , Jack W. Stokes, III , John C. Platt , Arungunram C. Surendran
发明人： Asif Iqbal Mohammad , Jack W. Stokes, III , John C. Platt , Arungunram C. Surendran
IPC分类号： H04B3/20 , H04B1/38 , A61F11/06 , G06F17/10 , H04M9/08
CPC分类号： H04M19/04 , H04B3/234
摘要： Signal detectors are described herein. By way of example, a system for detecting signals can include a microphone signal detector, a loudspeaker signal detector, a signal discriminator and a decision component. When the microphone signal detector detects the presence of a microphone signal, the loudspeaker signal detector detects the presence of a loudspeaker signal and the signal discriminator determines that near-end speech dominates loudspeaker echo, the decision component can confirm the presence of doubletalk. When the microphone signal detector detects the presence of a microphone signal and the signal discriminator determines that near-end speech dominates loudspeaker echo, the decision component confirms the presence of near-end signal.
摘要翻译：这里描述了信号检测器。作为示例，用于检测信号的系统可以包括麦克风信号检测器，扬声器信号检测器，信号鉴别器和决定部件。当麦克风信号检测器检测到麦克风信号的存在时，扬声器信号检测器检测到扬声器信号的存在，并且信号鉴别器确定近端语音主导扬声器回波，判定部件可以确认双音节的存在。当麦克风信号检测器检测到麦克风信号的存在并且信号鉴别器确定近端语音主导扬声器回波时，决定部件确认近端信号的存在。

4. 发明授权

US08081753B2 Hybrid echo canceller controllers 有权
标题翻译：混合回波消除器控制器
公开(公告)号：US08081753B2
公开(公告)日：2011-12-20
申请号：US11695440
申请日：2007-04-02
申请人： Asif Iqbal Mohammad , Jack W. Stokes, III
发明人： Asif Iqbal Mohammad , Jack W. Stokes, III
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Hybrid echo canceller controllers are described herein. By way of example, a system for controlling an echo canceller can include a signal indicator and an echo canceller controller. The signal indicator can be configured to indicate periods of near-end signal and to indicate periods of echo only with echo-path change in the corrupted signal based at least in part on cross-correlation between two signals associated with the echo canceller. The echo canceller controller can be configured to control the echo canceller according to indications from the signal indicator.
摘要翻译：本文描述了混合回波消除器控制器。作为示例，用于控制回波消除器的系统可以包括信号指示器和回波消除器控制器。信号指示器可以被配置为指示近端信号的周期，并且至少部分地基于与回波消除器相关联的两个信号之间的互相关，仅指示被破坏的信号中的回波路径改变的回波周期。回波消除器控制器可以被配置为根据来自信号指示器的指示来控制回波消除器。

5. 发明授权

US08600038B2 System and method for echo cancellation 失效
标题翻译：用于回声消除的系统和方法
公开(公告)号：US08600038B2
公开(公告)日：2013-12-03
申请号：US12204608
申请日：2008-09-04
申请人： Asif Iqbal Mohammad , Steven L. Grant , Heejong Yoo , Deepak Kumar Challa
发明人： Asif Iqbal Mohammad , Steven L. Grant , Heejong Yoo , Deepak Kumar Challa
IPC分类号： H04M9/08 , A61F2/20 , H04B3/20 , H04B1/38
CPC分类号： H04M9/082 , H04B3/234
摘要： An echo canceller for improved recognition and removal of an echo from a communication device. The echo canceller can dynamically reduce echo using an improved energy estimator and an improved adaptive filter. The improved energy estimator can determine if conversation is in a single talk period or a double talk period based on the combined energy of both the near end background noise and speech. The improved adaptive filter can reduce echo by dynamically changing adaptation speed or step size. In double talk, the adaptive filter(s) can dynamically slow-down or stop adaptation. In single talk, the filter can dynamically increase the speed of adaptation to improve accuracy, or decrease adaptation speed for stability.
摘要翻译：用于改善来自通信设备的回波的识别和去除的回波消除器。回波消除器可以使用改进的能量估计器和改进的自适应滤波器来动态地减少回波。改进的能量估计器可以基于近端背景噪声和语音的组合能量来确定对话是处于单个通话周期还是双重通话周期。改进的自适应滤波器可以通过动态地改变自适应速度或步长来减少回波。在双语中，自适应滤波器可以动态地减慢或停止适应。在单声道中，滤波器可以动态地提高适应速度，以提高精度，或者降低适应速度以获得稳定性。

6. 发明申请

US20080240415A1 HYBRID ECHO CANCELLER CONTROLLERS 有权
标题翻译：混合式ECHO CANCELLER控制器
公开(公告)号：US20080240415A1
公开(公告)日：2008-10-02
申请号：US11695447
申请日：2007-04-02
申请人： Asif Iqbal Mohammad , Jack W. Stokes
发明人： Asif Iqbal Mohammad , Jack W. Stokes
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Hybrid echo canceller controllers are described herein. By way of example, a system for controlling an echo canceller can include a cross-correlator, a discriminator and an echo canceller controller. The cross-correlator can be configured to produce a cross-correlation based output that facilitates controlling the echo canceller by cross-correlating two signals associated with the echo canceller. The discriminator can be configured to produce a discriminator output that discriminates between near-end signal and echo in a corrupted signal. The echo canceller controller can be configured to control the echo canceller according to the cross-correlation based output and the discriminator output.
摘要翻译：本文描述了混合回波消除器控制器。作为示例，用于控制回波消除器的系统可以包括交叉相关器，鉴别器和回声消除器控制器。互相关器可以被配置为产生基于互相关的输出，其有助于通过将与回波消除器相关联的两个信号相互关联来控制回波消除器。鉴别器可以被配置为产生鉴别器输出，其鉴别受损信号中的近端信号和回波。回波消除器控制器可以被配置为根据基于互相关的输出和鉴别器输出来控制回波消除器。

7. 发明申请

US20080240414A1 HYBRID ECHO CANCELLER CONTROLLERS 有权
标题翻译：混合式ECHO CANCELLER控制器
公开(公告)号：US20080240414A1
公开(公告)日：2008-10-02
申请号：US11695440
申请日：2007-04-02
申请人： Asif Iqbal Mohammad , Jack W. Stokes
发明人： Asif Iqbal Mohammad , Jack W. Stokes
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Hybrid echo canceller controllers are described herein. By way of example, a system for controlling an echo canceller can include a signal indicator and an echo canceller controller. The signal indicator can be configured to indicate periods of near-end signal and to indicate periods of echo only with echo-path change in the corrupted signal based at least in part on cross-correlation between two signals associated with the echo canceller. The echo canceller controller can be configured to control the echo canceller according to indications from the signal indicator.
摘要翻译：本文描述了混合回波消除器控制器。作为示例，用于控制回波消除器的系统可以包括信号指示器和回波消除器控制器。信号指示器可以被配置为指示近端信号的周期，并且至少部分地基于与回波消除器相关联的两个信号之间的互相关，仅指示被破坏的信号中的回波路径改变的回波周期。回波消除器控制器可以被配置为根据来自信号指示器的指示来控制回波消除器。

8. 发明授权

US08498407B2 Systems and methods for double-talk detection in acoustically harsh environments 失效
标题翻译：在声学恶劣环境中进行双方通话检测的系统和方法
公开(公告)号：US08498407B2
公开(公告)日：2013-07-30
申请号：US12326868
申请日：2008-12-02
申请人： Asif Iqbal Mohammad , Eddie L. T. Choy , Heejong Yoo
发明人： Asif Iqbal Mohammad , Eddie L. T. Choy , Heejong Yoo
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： A communications device that is configured to detect double talk is described. An echo canceller is configured to cancel an echo from an input signal using an adaptive filter. A double-talk detector provides a double-talk statistic. The double-talk statistic is proportional to the ratio of the remaining echo energy in the cancellation error signal and the total cancellation error energy.
摘要翻译：描述配置成检测双方通话的通信设备。回声消除器被配置为使用自适应滤波器从输入信号中消除回波。双向通话检测器提供双方通话统计。双向统计量与抵消误差信号中的剩余回波能量与总消除误差能量的比例成比例。

9. 发明申请

US20100135483A1 SYSTEMS AND METHODS FOR DOUBLE-TALK DETECTION IN ACOUSTICALLY HARSH ENVIRONMENTS 失效
标题翻译：声学环境中双重检测的系统与方法
公开(公告)号：US20100135483A1
公开(公告)日：2010-06-03
申请号：US12326868
申请日：2008-12-02
申请人： Asif Iqbal Mohammad , Eddie L.T. Choy , Heejong Yoo
发明人： Asif Iqbal Mohammad , Eddie L.T. Choy , Heejong Yoo
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： A communications device that is configured to detect double talk is described. An echo canceller is configured to cancel an echo from an input signal using an adaptive filter. A double-talk detector provides a double-talk statistic. The double-talk statistic is proportional to the ratio of the remaining echo energy in the cancellation error signal and the total cancellation error energy.
摘要翻译：描述配置成检测双方通话的通信设备。回声消除器被配置为使用自适应滤波器从输入信号中消除回波。双向通话检测器提供双方通话统计。双向统计量与抵消误差信号中的剩余回波能量与总消除误差能量的比例成比例。

10. 发明申请

US20100057454A1 SYSTEM AND METHOD FOR ECHO CANCELLATION 失效
标题翻译： ECHO CANCELLATION的系统和方法
公开(公告)号：US20100057454A1
公开(公告)日：2010-03-04
申请号：US12204608
申请日：2008-09-04
申请人： Asif Iqbal Mohammad , Steven L. Grant , Heejong Yoo , Deepak Challa
发明人： Asif Iqbal Mohammad , Steven L. Grant , Heejong Yoo , Deepak Challa
IPC分类号： G10L15/20
CPC分类号： H04M9/082 , H04B3/234
摘要： An echo canceller for improved recognition and removal of an echo from a communication device. The echo canceller can dynamically reduce echo using an improved energy estimator and an improved adaptive filter. The improved energy estimator can determine if conversation is in a single talk period or a double talk period based on the combined energy of both the near end background noise and speech. The improved adaptive filter can reduce echo by dynamically changing adaptation speed or step size. In double talk, the adaptive filter(s) can dynamically slow-down or stop adaptation. In single talk, the filter can dynamically increase the speed of adaptation to improve accuracy, or decrease adaptation speed for stability.
摘要翻译：用于改善来自通信设备的回波的识别和去除的回波消除器。回波消除器可以使用改进的能量估计器和改进的自适应滤波器来动态地减少回波。改进的能量估计器可以基于近端背景噪声和语音的组合能量来确定对话是处于单个通话周期还是双重通话周期。改进的自适应滤波器可以通过动态地改变自适应速度或步长来减少回波。在双语中，自适应滤波器可以动态地减慢或停止适应。在单声道中，滤波器可以动态地提高适应速度，以提高精度，或者降低适应速度以获得稳定性。

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