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Multi frequency band noise suppression system using signal-to-noise ratio estimation

신호 대 잡음비 추정 방법을 이용한 다중 주파수 밴드 잡음 억제 시스템

Oh, In Kyu;Lee, In Sung
오인규;이인성

  • Received : 2015.09.22
  • Accepted : 2015.12.30
  • Published : 2016.03.31

Abstract

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).

Keywords

PSD (Power Spectrum Density);CSD (Cross-power Spectrum Density);Coherence function;Multi-band

References

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Acknowledgement

Supported by : 충북대학교