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    • 2. 发明授权
    • Hybrid echo canceller controllers
    • 混合回波消除器控制器
    • US08019075B2
    • 2011-09-13
    • US11695447
    • 2007-04-02
    • Asif Iqbal MohammadJack W. Stokes, III
    • Asif Iqbal MohammadJack W. Stokes, III
    • H04M9/08
    • H04M9/082
    • 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.
    • 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。
    • 4. 发明授权
    • Hybrid echo canceller controllers
    • 混合回波消除器控制器
    • US08081753B2
    • 2011-12-20
    • US11695440
    • 2007-04-02
    • Asif Iqbal MohammadJack W. Stokes, III
    • Asif Iqbal MohammadJack W. Stokes, III
    • H04M9/08
    • H04M9/082
    • 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.
    • 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
    • System and method for echo cancellation
    • 用于回声消除的系统和方法
    • US08600038B2
    • 2013-12-03
    • US12204608
    • 2008-09-04
    • Asif Iqbal MohammadSteven L. GrantHeejong YooDeepak Kumar Challa
    • Asif Iqbal MohammadSteven L. GrantHeejong YooDeepak Kumar Challa
    • H04M9/08A61F2/20H04B3/20H04B1/38
    • H04M9/082H04B3/234
    • 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.
    • 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
    • SYSTEM AND METHOD FOR ECHO CANCELLATION
    • ECHO CANCELLATION的系统和方法
    • US20100057454A1
    • 2010-03-04
    • US12204608
    • 2008-09-04
    • Asif Iqbal MohammadSteven L. GrantHeejong YooDeepak Challa
    • Asif Iqbal MohammadSteven L. GrantHeejong YooDeepak Challa
    • G10L15/20
    • H04M9/082H04B3/234
    • 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.
    • 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。
    • 8. 发明申请
    • HYBRID ECHO CANCELLER CONTROLLERS
    • 混合式ECHO CANCELLER控制器
    • US20080240415A1
    • 2008-10-02
    • US11695447
    • 2007-04-02
    • Asif Iqbal MohammadJack W. Stokes
    • Asif Iqbal MohammadJack W. Stokes
    • H04M9/08
    • H04M9/082
    • 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.
    • 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。
    • 9. 发明申请
    • HYBRID ECHO CANCELLER CONTROLLERS
    • 混合式ECHO CANCELLER控制器
    • US20080240414A1
    • 2008-10-02
    • US11695440
    • 2007-04-02
    • Asif Iqbal MohammadJack W. Stokes
    • Asif Iqbal MohammadJack W. Stokes
    • H04M9/08
    • H04M9/082
    • 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.
    • 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。