대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)
- 대한전자공학회 2000년도 제13회 신호처리 합동 학술대회 논문집
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- Pages.171-174
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- 2000
주파수 차지확률을 이용한 음성검출기 제안
Speech detection using the probability of spectral occupancy
- Hong, Seong-Bong (School of Electrical Engineering, Seoul National University) ;
- Ki, Tae-Young (School of Electrical Engineering, Seoul National University) ;
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Kim, Nam-Soo
(School of Electrical Engineering, Seoul National University) ;
- Kim, Taejeong (School of Electrical Engineering, Seoul National University)
- 발행 : 2000.09.01
초록
In this paper, we improve statistical-model-based speech detector using the probability that a speech occupies a frequency bin. While the previous method assumes speech energy occupies all the frequency components and use them with equal weights in the likelihood ratio test for speech detection, the proposed method assumes speech energy occupies just some frequency componets and use them with different weights in accordance with the probabilities of spectral occupancy in the test. The probability is iteratively up-dated for speech frames to contribute to the likelihood ratio test. The proposed method well reflects the characteristic distribution of speech spectrum, and yields better detection performance.
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