发明名称 |
LOW-LATENCY MULTI-DRIVER ADAPTIVE NOISE CANCELING (ANC) SYSTEM FOR A PERSONAL AUDIO DEVICE |
摘要 |
A personal audio device including multiple output transducers for reproducing different frequency bands of a source audio signal, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each of the transducers from at least one microphone signal that measures the ambient audio to generate anti-noise signals. The anti-noise signals are generated by separate adaptive filters such that the anti-noise signals cause substantial cancelation of the ambient audio at their corresponding transducers. The use of separate adaptive filters provides low-latency operation, since a crossover is not needed to split the anti-noise into the appropriate frequency bands. The adaptive filters can be implemented or biased to generate anti-noise only in the frequency band corresponding to the particular adaptive filter. The anti-noise signals are combined with source audio of the appropriate frequency band to provide outputs for the corresponding transducers. |
申请公布号 |
WO2014158449(A1) |
申请公布日期 |
2014.10.02 |
申请号 |
WO2014US16833 |
申请日期 |
2014.02.18 |
申请人 |
CIRRUS LOGIC, INC. |
发明人 |
HENDRIX, JON, D.;ALDERSON, JEFFREY;ABDOLLAHZADEH, MILANI, ALI;ZHOU, DAYONG;LU, YANG |
分类号 |
G10K11/178;H04R1/10;H04R3/12 |
主分类号 |
G10K11/178 |
代理机构 |
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地址 |
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