利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

6 条记录 (耗时 0.013 秒)

    Digital dual microphone module with intelligent cross fading
    2.
    发明授权
    Digital dual microphone module with intelligent cross fading 有权
    数字双麦克风模块具有智能交叉衰落

    公开(公告)号：US08577057B2

    公开(公告)日：2013-11-05

    申请号：US12917711

    申请日：2010-11-02

    申请人： Lalin S Theverapperuma ,  Darcy Zehnder ,  Steve Parker ,  Talal Aly-Youssef

    发明人： Lalin S Theverapperuma ,  Darcy Zehnder ,  Steve Parker ,  Talal Aly-Youssef

    IPC分类号： H04B15/00

    CPC分类号： H04R3/005 ,  G10L21/0208 ,  G10L2021/02165 ,  H04R2201/107 ,  H04R2410/05 ,  H04R2430/01

    摘要： A method of operating a microphone system includes providing first and second microphones associated with a same human speaker. An analog ambient noise signal is received from the first microphone. An analog speech signal is received from the second microphone. The analog ambient noise signal is converted into a digital ambient noise signal. The analog speech signal is converted into a digital speech signal. Digital noise cancellation is performed on the digital speech signal dependent upon the digital ambient noise signal. The digital noise cancellation is performed by digital circuitry. The noise canceled digital speech signal is inputted into an intercom system. A low power condition of the microphone system and/or a failure of the digital circuitry is sensed. In response to the sensing step, an analog-based intercom signal is inputted into the intercom system. The analog-based intercom signal is dependent on the analog speech signal and substantially independent of the analog ambient noise signal. The analog-based intercom signal is inputted into the intercom system without noise cancellation having been performed on the analog-based intercom signal.

    摘要翻译： 一种操作麦克风系统的方法包括提供与同一个人讲话者相关联的第一和第二麦克风。 从第一麦克风接收模拟环境噪声信号。 从第二麦克风接收模拟语音信号。 模拟环境噪声信号被转换为数字环境噪声信号。 模拟语音信号被转换成数字语音信号。 取决于数字环境噪声信号对数字语音信号进行数字噪声消除。 数字噪声消除由数字电路执行。 噪声消除的数字语音信号被输入到对讲系统中。 感测到麦克风系统的低功率状况和/或数字电路的故障。 响应于感测步骤，将基于模拟的对讲信号输入到对讲系统中。 基于模拟的对讲信号取决于模拟语音信号，并且基本上独立于模拟环境噪声信号。 基于模拟的内部通信信号被输入到对讲系统中，没有对基于模拟的对讲信号进行噪声消除。

    Adaptive digital noise canceller
    3.
    发明授权
    Adaptive digital noise canceller 有权
    自适应数字噪声消除器

    公开(公告)号：US08385559B2

    公开(公告)日：2013-02-26

    申请号：US12649770

    申请日：2009-12-30

    申请人： Lalin Theverapperuma ,  Talal Aly Youssef

    发明人： Lalin Theverapperuma ,  Talal Aly Youssef

    IPC分类号： G10K11/16

    CPC分类号： G10K11/17817 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1053 ,  G10K2210/1081 ,  G10K2210/3017 ,  G10K2210/30232 ,  G10K2210/3049 ,  H04R1/1083

    摘要： Systems and methods for adaptive feed-forward noise cancellation. The system includes a plurality of reference microphones, an error microphone, a secondary path module, an adaptation controller, and a canceller filter. A finite impulse response (“FIR”) based plant model is converted to an infinite impulse response (“IIR”) based plant model using balanced model reduction. Due to the inherent instability of the adaptive IIR filter, the Schur-Cohn stability test is applied to the denominator coefficients of the IIR filter transfer function to determine the stability of the noise cancellation system. A secondary path of the noise cancellation system is identified in an on-line manner in the secondary path module. If the energy level of the communication signal (e.g., a music signal) is strong, secondary path identification is performed. The adaptation controller controls the updating of the IIR transfer function based on the stability determination and the secondary path. An anti-noise signal is then generated and added to the communication signal. The anti-noise signal is generated within approximately 60 or fewer micro-seconds.

    摘要翻译： 用于自适应前馈噪声消除的系统和方法。 该系统包括多个参考麦克风，误差麦克风，次要路径模块，自适应控制器和消除器滤波器。 基于有限脉冲响应（FIR）的植物模型使用平衡模型降低转换为基于无限脉冲响应（IIR）的植物模型。 由于自适应IIR滤波器的固有不稳定性，Schur-Cohn稳定性测试被应用于IIR滤波器传递函数的分母系数，以确定噪声消除系统的稳定性。 在次要路径模块中以在线方式识别噪声消除系统的辅助路径。 如果通信信号（例如，音乐信号）的能级很强，则执行次要路径识别。 适应控制器基于稳定性确定和辅助路径来控制IIR传递函数的更新。 然后产生抗噪声信号并将其加到通信信号中。 抗噪声信号在大约60个或更少的微秒内产生。

    ADAPTIVE DIGITAL NOISE CANCELLER
    4.
    发明申请
    ADAPTIVE DIGITAL NOISE CANCELLER 有权
    自适应数字噪音消除器

    公开(公告)号：US20110158419A1

    公开(公告)日：2011-06-30

    申请号：US12649770

    申请日：2009-12-30

    申请人： Lalin Theverapperuma ,  Talal Aly Youssef

    发明人： Lalin Theverapperuma ,  Talal Aly Youssef

    IPC分类号： G10K11/16

    CPC分类号： G10K11/17817 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1053 ,  G10K2210/1081 ,  G10K2210/3017 ,  G10K2210/30232 ,  G10K2210/3049 ,  H04R1/1083

    摘要： Systems and methods for adaptive feed-forward noise cancellation. The system includes a plurality of reference microphones, an error microphone, a secondary path module, an adaptation controller, and a canceller filter. A finite impulse response (“FIR”) based plant model is converted to an infinite impulse response (“IIR”) based plant model using balanced model reduction. Due to the inherent instability of the adaptive IIR filter, the Schur-Cohn stability test is applied to the denominator coefficients of the IIR filter transfer function to determine the stability of the noise cancellation system. A secondary path of the noise cancellation system is identified in an on-line manner in the secondary path module. If the energy level of the communication signal (e.g., a music signal) is strong, secondary path identification is performed. The adaptation controller controls the updating of the IIR transfer function based on the stability determination and the secondary path. An anti-noise signal is then generated and added to the communication signal. The anti-noise signal is generated within approximately 60 or fewer micro-seconds.

    摘要翻译： 用于自适应前馈噪声消除的系统和方法。 该系统包括多个参考麦克风，误差麦克风，次要路径模块，自适应控制器和消除器滤波器。 基于有限脉冲响应（“FIR”）的植物模型使用平衡模型降低转换为基于无限脉冲响应（“IIR”）的植物模型。 由于自适应IIR滤波器的固有不稳定性，Schur-Cohn稳定性测试被应用于IIR滤波器传递函数的分母系数，以确定噪声消除系统的稳定性。 在次要路径模块中以在线方式识别噪声消除系统的辅助路径。 如果通信信号（例如，音乐信号）的能级很强，则执行次要路径识别。 适应控制器基于稳定性确定和辅助路径来控制IIR传递函数的更新。 然后产生抗噪声信号并将其加到通信信号中。 抗噪声信号在大约60个或更少的微秒内产生。

    DIGITAL DUAL MICROPHONE MODULE WITH INTELLIGENT CROSS FADING
    6.
    发明申请
    DIGITAL DUAL MICROPHONE MODULE WITH INTELLIGENT CROSS FADING 有权
    数字双麦克风模块与智能交叉渐变

    公开(公告)号：US20120106753A1

    公开(公告)日：2012-05-03

    申请号：US12917711

    申请日：2010-11-02

    申请人： Lalin S. Theverapperuma ,  Darcy Zehnder ,  Steve Parker ,  Talal Aly-Youssef

    发明人： Lalin S. Theverapperuma ,  Darcy Zehnder ,  Steve Parker ,  Talal Aly-Youssef

    IPC分类号： H04R3/00

    CPC分类号： H04R3/005 ,  G10L21/0208 ,  G10L2021/02165 ,  H04R2201/107 ,  H04R2410/05 ,  H04R2430/01

    摘要： A method of operating a microphone system includes providing first and second microphones associated with a same human speaker. An analog ambient noise signal is received from the first microphone. An analog speech signal is received from the second microphone. The analog ambient noise signal is converted into a digital ambient noise signal. The analog speech signal is converted into a digital speech signal. Digital noise cancellation is performed on the digital speech signal dependent upon the digital ambient noise signal. The digital noise cancellation is performed by digital circuitry. The noise canceled digital speech signal is inputted into an intercom system. A low power condition of the microphone system and/or a failure of the digital circuitry is sensed. In response to the sensing step, an analog-based intercom signal is inputted into the intercom system. The analog-based intercom signal is dependent on the analog speech signal and substantially independent of the analog ambient noise signal. The analog-based intercom signal is inputted into the intercom system without noise cancellation having been performed on the analog-based intercom signal.

    摘要翻译： 一种操作麦克风系统的方法包括提供与同一个人讲话者相关联的第一和第二麦克风。 从第一麦克风接收模拟环境噪声信号。 从第二麦克风接收模拟语音信号。 模拟环境噪声信号被转换为数字环境噪声信号。 模拟语音信号被转换成数字语音信号。 取决于数字环境噪声信号对数字语音信号进行数字噪声消除。 数字噪声消除由数字电路执行。 噪声消除的数字语音信号被输入到对讲系统中。 感测到麦克风系统的低功率状况和/或数字电路的故障。 响应于感测步骤，将基于模拟的对讲信号输入到对讲系统中。 基于模拟的对讲信号取决于模拟语音信号，并且基本上独立于模拟环境噪声信号。 基于模拟的内部通信信号被输入到对讲系统中，没有对基于模拟的对讲信号进行噪声消除。