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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한전기학회 International Journal of Control Automation and Systems International Journal of Control Automation and System Vol.6 No.6
- 발행연도
- 2008.12
- 수록면
- 818 - 827 (10page)
이용수
초록· 키워드
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In this paper, we propose a new noise estimation and reduction algorithm for stationary and nonstationary noisy environments. This approach uses an algorithm that classifies the speech and noise signal contributions in time-frequency bins. It relies on the ratio of the normalized standard deviation of the noisy power spectrum in 'time-frequency bins to its average. If the ratio is greater than an adaptive estimator, speech is considered to be present. The propose method uses an auto control parameter for an adaptive estimator to work well in highly nonstationary noisy environments. The auto control parameter is controlled by a linear function using a posteriori signal to noise ratio (SNR) according to the increase or the decrease of the noise level. The estimated clean speech power spectrum is obtained by a modified gain function and the updated noisy power spectrum of the time-frequency bin. This new algorithm has the advantages of much more simplicity and light computational load for estimating the stationary and nonstationary noise environments. The proposed algorithm is superior to conventional methods. To evaluate the algorithm's performance, we test it using the NOIZEUS database, and use the segment signal-to-noise ratio (SNR) and ITU-T P.835 as evaluation criteria.
목차
Abstract
1. INTRODUCTION
2. SYSTEM MODEL
3. PROPOSED NOISE ESTIMATION AND REDUCTION ALGORITHM
4. EXPERIMENTAL RESULTS AND DISCUSSION
5. CONCLUSIONS
REFERENCES
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UCI(KEPA) : I410-ECN-0101-2010-560-001911393