Adaptive Null-Forming Algorithm with Auditory Sub-bands
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.
KeywordsSpeech Signal Noise Source Auditory Character Speech Enhancement Microphone Array
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