发明名称 |
ADAPTIVE-NOISE CANCELING (ANC) EFFECTIVENESS ESTIMATION AND CORRECTION IN A PERSONAL AUDIO DEVICE |
摘要 |
Techniques for estimating adaptive noise canceling (ANC) performance in a personal audio device, such as a wireless telephone, provide robustness of operation by triggering corrective action when ANC performance is low, and/or by saving a state of the ANC system when ANC performance is high. An anti-noise signal is generated from a reference microphone signal and is provided to an output transducer along with program audio. A measure of ANC gain is determined by computing a ratio of a first indication of magnitude of an error microphone signal that provides a measure of the ambient sounds and program audio heard by the listener including the effects of the anti-noise, to a second indication of magnitude of the error microphone signal without the effects of the anti-noise. The ratio can be determined for different frequency bands in order to determine whether particular adaptive filters are trained properly. |
申请公布号 |
EP2973539(A1) |
申请公布日期 |
2016.01.20 |
申请号 |
EP20140707301 |
申请日期 |
2014.02.18 |
申请人 |
CIRRUS LOGIC, INC. |
发明人 |
LI, NING;MILLER, ANTONIO JOHN;HENDRIX, JON D.;SU, JIE;ALDERSON, JEFFREY;ABDOLLAHZADEH MILANI, ALI |
分类号 |
G10K11/178 |
主分类号 |
G10K11/178 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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