CPSP 문턱값 설정을 통한 음원도달 방향 추정 성능 개선
Performance Improvement of Sound Direction of Arrival Estimation by Applying Threshold to CPSP
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초록
To estimate sound direction of arrival with a pair of microphones, a method based on Time Difference of Arrival (TDOA)estimation using the Cross Power Spectrum Phase (CPSP) function is largely used due to its simplicity and good performance. In this paper, we investigate CPSP maximum values for various SNRs and adverse environments, and propose a novel method to improve the estimation performance of sound direction of arrival. The proposed method applies a threshold to the CPSP values and increases the reliability of the estimated sound direction. Through computer simulation for various SNRs, we validate the effectiveness of the proposed method. When the threshold was set to 0.1, more than 90% of success rate of sound direction of arrival estimation has been achieved for directions of 10°, 40°, 70° from the source location even with reverberation times of 0.1s.
Abstract
To estimate sound direction of arrival with a pair of microphones, a method based on Time Difference of Arrival (TDOA)estimation using the Cross Power Spectrum Phase (CPSP) function is largely used due to its simplicity and good performance. In this paper, we investigate CPSP maximum values for various SNRs and adverse environments, and propose a novel method to improve the estimation performance of sound direction of arrival. The proposed method applies a threshold to the CPSP values and increases the reliability of the estimated sound direction. Through computer simulation for various SNRs, we validate the effectiveness of the proposed method. When the threshold was set to 0.1, more than 90% of success rate of sound direction of arrival estimation has been achieved for directions of 10°, 40°, 70° from the source location even with reverberation times of 0.1s.
참고문헌 (5)
- Veen, B. V, "Beamforming: A versatile approach to spatial filtering", IEEE ASSP Magazine, 5(2), pp.4~24 (1988)
- Claudio, E. D, "Multi-source localization in reverberant environments by root-music and clustering", ICASSP, 통권 : 2, pp.921~924 (2000)
- Knapp, C, "The generalized correlation method for estimation of time delay", Acoustics, Speech and Signal Processing, 24(4), pp.320~327 (1976)
- Allen, J, "Image method for efficiently simulating small-room acoustics", J. Acoust. Soc. Am, 65(4), pp.943~950 (1979)
- 권홍석, "프리엠퍼시스를 이용한 CPSP 기반의 도달시간차이 추정 성능 개선", 한국음향학회지, 28(5), pp.461~470 (2009), 한국음향학회