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Multi frequency band noise suppression system using signal-to-noise ratio estimation
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 Title & Authors
Multi frequency band noise suppression system using signal-to-noise ratio estimation
Oh, In Kyu; Lee, In Sung;
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This paper proposes a noise suppression method through SNR (Singal-to Noise Ratio) estimation in the two microphone array environment of close spacing. The conventional method uses a noise suppression method for a gain function obtained through the SNR estimation based on coherence function from full band. However, this method cause performance decreased by the noise damage that affects all the feature vector component. So, we propose a noise suppression method that allocates a frequency domain signal into N constant multi frequency band and each frequency band gets a gain function through SNR estimation based on coherence function. Performance evaluation of the proposed method is shown by comparison with PESQ (Perceptual Evaluation of Speech Quality) value which is an objective quality evaluation method provided by the ITU-T (International Telecommunications Union Telecommunication).
PSD (Power Spectrum Density);CSD (Cross-power Spectrum Density);Coherence function;Multi-band;
 Cited by
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