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。