대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1999년도 추계학술대회 논문집 학회본부 B
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- Pages.748-750
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- 1999
사이코어쿠스틱스 모델을 이용한 음성 향상
Speech enhancement using psychoacoustics model
- Kwon, Chul-Hyun (Dept. of Electrical & Computer Eng. Yonsei Univ.) ;
- Shin, Dae-Kyu (Dept. of Electrical & Computer Eng. Yonsei Univ.) ;
- Park, Sang-Hui (Dept. of Electrical & Computer Eng. Yonsei Univ.)
- 발행 : 1999.11.20
초록
In this study, a speech enhancement is presented based on the utilization of well-known auditory mechanism, noise masking. The speech enhancement approach adopted here is to derive an modifier that achieves audible noise suppression. This modification selectively affects the perceptually significant spectral values, and is therefore less prone to introduction of unwanted distortions than methods that affect the complete STSA and produces more enhanced results at low SNR as well as at high SNR. The speech enhancement method adopted here needs exact estimation of the minimum specteal value per critical band because it uses only the minimum spectral value per critical band. For this, the method adopted here uses the modified spectral subtraction that is more flexible than power spectral subtraction. So, the result in experiment represented better SNR than before.
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