한국방송∙미디어공학회:학술대회논문집 (Proceedings of the Korean Society of Broadcast Engineers Conference)
- 한국방송공학회 2011년도 하계학술대회
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- Pages.122-125
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- 2011
Improved Single Channel Speech Enhancement Algorithm Using Adaptive Postfiltering
- Song, Eunwoo (Dept. of Electrical and Electronic Engineering, Yonsei University) ;
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Kang, Hong-Goo
(Dept. of Electrical and Electronic Engineering, Yonsei University)
- 발행 : 2011.07.07
초록
In real environment, background noise exists everywhere and degrades the performance of system. To reduce this distortion, a speech enhancement algorithm can be very useful and variety methods have been proposed. In this paper, we propose a postfilter to improve the performance of optimally modified log-spectral amplitude (OM-LSA) estimator. Proposed algorithm uses the formant postfilter to minimize perceptual distortion caused by background noise. We adjust an emphasizing parameter which is varied by spectral flatness and first reflection coefficient. The performance of the proposed algorithm is evaluated by measuring the log-spectral distance (LSD) and the perceptual evaluation of speech quality (PESQ) score. The test results show the improvement of proposed algorithm compared to conventional OM-LSA.
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