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NOISE CANCELLATION FILTER STRUCTURE, NOISE CANCELLATION SYSTEM AND SIGNAL PROCESSING METHOD
NOISE CANCELLATION FILTER STRUCTURE, NOISE CANCELLATION SYSTEM AND SIGNAL PROCESSING METHOD
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机译:噪声消除滤波器的结构,噪声消除系统及信号处理方法
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摘要
A noise cancellation filter structure for a noise cancellation enabled audio device, in particular headphone, comprises a noise input for receiving a noise signal and a filter output for providing a filter output signal. A first noise filter produces a first filter signal by filtering the noise signal and a second noise filter produces a second filter signal by filtering the noise signal. The second noise filter has a frequency response with a non-minimum-phase, in particular maximum-phase. A combiner is configured to provide the filter output signal based on a linear combination of the first filter signal and the second filter signal.
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