Md. Ekramul Hamid, Somlal Das, Keikichi Hirose, Md. Khademul Islam Molla
언어
영어(ENG)
URL
https://www.earticle.net/Article/A208826
※ 원문제공기관과의 협약기간이 종료되어 열람이 제한될 수 있습니다.
원문정보
초록
영어
This paper presents a novel algorithm of speech enhancement using data adaptive soft-thresolding technique. The noisy speech signal is decomposed into a finite set of band limited signals called intrinsic mode functions (IMFs) using empirical mode decomposition (EMD). Each IMF is divided into fixed length subframes. On the basis of noise contamination, the subframes are classified into two groups – noise dominant and speech dominant. Only the noise dominant subframes are thresholded for noise suppression. A data adaptive threshold function is computed for individual IMF on the basis of its variance. We propose a function for optimum adaptation factor for adaptive thresholding which was previously prepared by the least squares method using the estimated input signal to noise ratio (SNR) and calculated adaptation factor to obtain maximum output SNR. Moreover, good efficiency of the algorithm is achieved by an appropriate subframe processing. After noise suppression, all the IMFs (including the residue) are summed up to reconstruct the enhanced speech signal. The experimental results illustrate that the proposed algorithm show a noticeable efficiency compared to the recently developed speech denoising methods.
목차
Abstract 1. Introduction 2. Adaptive Thresholding with EMD 2.1. Denoising by Soft-thresholding 2.2. Subframe Classification 2.3. Variance Estimation of IMFs 2.4. Estimation of Optimum Adaptation Factor 3. Experimental Results and Discussions 4. Conclusions References
보안공학연구지원센터(IJSIP) [Science & Engineering Research Support Center, Republic of Korea(IJSIP)]
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 Signal Processing, Image Processing and Pattern Recognition
간기
격월간
pISSN
2005-4254
수록기간
2008~2016
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Signal Processing, Image Processing and Pattern Recognition Vol.5 No.2