Noise power spectral density (PSD) estimation is a crucial part of speech enhancement system due to its contributory effect on the quality of the noise reduced speech. A novel estimation method for color noise PSD on the basis of an assumption of generalized Gamma distribution and maximum a posteriori (MAP) criterion is proposed. In the experiment, generalized Gamma PDF which is a natural extension of the Gaussian modeling of a non-white components distribution is found best fitting in four types of color noises compared with Laplace, Rayleigh distributions. After that MAP noise estimators based on the reported generalized Gamma PDF models are competed with Minimum Statistics (MS), minimum mean square error (MMSE) based PSD estimation and Maximum Likelihood estimation (MLE) noise tracking methods in evaluations. The performance of the proposed noise estimations are good as demonstrated by log error, segmental SNR and PESQ measures when they are integrated with the speech enhancement technique.
목차
Abstract 1. Introduction 2. Noise Magnitude Models and Statistical Analysis 2.1. The Distribution of Noise Spectral Amplitude 2.2. The Approximate Generalized Gamma PDF 2.3. The Parameters of the Normalized Approximate Probability Density Function 2.5. Noise PSD Estimation based on MAP 3. Experiments and Simulated Results 3.1. Modified Wiener Filter 3.2. Experiment Setup 3.3. Evaluation Measures 3.4. Performance Evaluation 4. Conclusions References
키워드
Speech enhancementnoise PSD estimationMAPMLE
저자
Xin Dang [ Information Science and Technology, Graduate School of Science and Technology, Shizuoka University ]
Takayoshi Nakai [ Information Science and Technology, Graduate School of Science and Technology, Shizuoka University ]
Md. Iqbal Aziz Khan [ Information Science and Technology, Graduate School of Science and Technology, Shizuoka University ]
보안공학연구지원센터(IJAST) [Science & Engineering Research Support Center, Republic of Korea(IJAST)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Advanced Science and Technology
간기
월간
pISSN
2005-4238
수록기간
2008~2016
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Advanced Science and Technology Vol.54