Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Noise suppressor Using Psychoacoustic Model and Wavelet Packet Transform

심리음향 모델과 웨이블릿 패킷 변환을 이용한 잡음제거기

  • Kim, Mi-Seon (Dept. Information communication engineering, Chungbuk National University) ;
  • Kim, Young-Ju (Dept. Information communication engineering, Chungbuk National University) ;
  • Lee, In-Sung (Dept. Information communication engineering, Chungbuk National University)
  • Published : 2006.06.21
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Abstract

In this paper, we propose the noise suppressor with the psychoacoustic model and wavelet packet transform. The objective of the scheme is to enhance speech corrupted by colored or non-stationary noise. If corrupted noise is colored, subband approach would be more efficient than whole band one. To avoid serious residual noise and speech distortion, we must adjust the Wavelet Coefficient threshold. In this paper, the subband is designed matching with the critical band. And WCT is adapted by noise masking threshold(NMT) and segmental signal to noise ratio(seg_SNR). Consequently this work improve the PESQ-MOS about 0.23 in the case of coded speech.

Keywords