发明公开
EP2847760A2 ERROR-SIGNAL CONTENT CONTROLLED ADAPTATION OF SECONDARY AND LEAKAGE PATH MODELS IN NOISE-CANCELING PERSONAL AUDIO DEVICES
审中-公开
按错误信号内容驱动的副泄漏路径模型的调适降噪个性化音频设备
- 专利标题： ERROR-SIGNAL CONTENT CONTROLLED ADAPTATION OF SECONDARY AND LEAKAGE PATH MODELS IN NOISE-CANCELING PERSONAL AUDIO DEVICES
- 专利标题（中）： 按错误信号内容驱动的副泄漏路径模型的调适降噪个性化音频设备
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申请号： EP13721165.2申请日： 2013-04-18
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公开(公告)号： EP2847760A2公开(公告)日： 2015-03-18
- 发明人: ALDERSON, Jeffrey , HENDRIX, Jon, D. , LU, Yang
- 申请人： Cirrus Logic, Inc.
- 申请人地址： 800 West 6th Street Austin, TX 78701 US
- 专利权人： Cirrus Logic, Inc.
- 当前专利权人： Cirrus Logic, Inc.
- 当前专利权人地址： 800 West 6th Street Austin, TX 78701 US
- 代理机构： Käck, Stefan
- 优先权： US201261645265P 20120510; US201313787906 20130307
- 国际公布： WO2013169454 20131114
- 主分类号： G10K11/178
- IPC分类号： G10K11/178
摘要：
A personal audio device, such as a wireless telephone, generates an anti-noise signal from a microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. The microphone measures the ambient environment, but also contains a component due to the transducer acoustic output. An adaptive filter is used to estimate the electro-acoustical path from the noise-canceling circuit through the transducer to the at least one microphone so that source audio can be removed from the microphone signal. A determination of the relative amount of the ambient sounds present in the microphone signal versus the amount of the transducer output of the source audio present in the microphone signal is made to determine whether to update the adaptive response.
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