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독립 성분 분석과 지각 필터를 이용한 음질 개선Performance Improvement of Speech Enhancement Using Independent Component Analysis and Perceptual Filtering

Other Titles
Performance Improvement of Speech Enhancement Using Independent Component Analysis and Perceptual Filtering
Authors
구교식차형태
Issue Date
May-2010
Publisher
한국음향학회
Keywords
Noise Cancellation; Perceptual Filter; Psychoacoustics Theory; Independent Component Analysis; 잡음 제거; 지각필터; 심리음향; 독립성분분석
Citation
한국음향학회지, v.29, no.4, pp.270 - 277
Journal Title
한국음향학회지
Volume
29
Number
4
Start Page
270
End Page
277
URI
http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/15169
ISSN
1225-4428
Abstract
본 논문에서는 독립 성분 분석 기법과 적응 지각 필터를 이용하여 잡음에 오염된 신호에서 잡음을 추정 및 제거함으로서보다효율적으로오디오신호를개선하는방법에대해제안한다.기존의적응지각필터는묵음구간에서추정된고정적인추정잡음을사용하기때문에잡음이시간에따라가변적일경우성능이상당히저하된다.그러나제안된알고리즘은독립성분분석기법을이용하여신호구간마다달라지는잡음을추정한후이를적응지각필터에적용시켜준다.제안된알고리즘의성능분석을위하여기존및제안된알고리즘을이용한시뮬레이션을수행하였으며,그결과로제안된알고리즘은기존의알고리즘에 비해 향상된 결과를 생성하였다. 더불어 음질의 열화도 적음을 확인할 수 있었다.
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