Adaptive Null-Forming Algorithm with Auditory Sub-bands

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【作者】 Heng Zhang  Qiang Fu  Yonghong Yan 

【关键词】 NULL  Microphone  SIn  CoS  SNR 

【摘要】This paper presents a modified noise reduction algorithm for speech enhancement based on the scheme of null-forming. A fixed infinite-duration impulse response (IIR) filter is designed to calibrate the mismatch of the microphone pair. To weaken the performance degradation caused by narrow-band effect; the signal is decomposed into several specified sub-bands with auditory characters. This increases the signal to noise ratio (SNR) considerably while preserving the auditory effect. Experiments are carried out to show the effectiveness of these processes.