Title :
Soft thresholding for DCT speech enhancement
Author :
Salahuddin, S. ; Islam, S. Z AI ; Hasan, Md K. ; Khan, M.R.
Author_Institution :
Dept. of Electr. & Electron. Eng., Bangladesh Univ. of Eng. & Technol., Dhaka, Bangladesh
fDate :
11/21/2002 12:00:00 AM
Abstract :
A speech enhancement method in the DCT domain using a new soft thresholding strategy is proposed. Exploiting the behaviour of the amplitude distribution of the DCT coefficients, a linear function is introduced for amplitude thresholding, unlike the conventional constant noise-level subtraction rule. The experimental results show significant improvement in output SNR and quality as compared top previously reported results.
Keywords :
discrete cosine transforms; noise; speech enhancement; DCT coefficients; DCT speech enhancement; amplitude distribution; amplitude thresholding; constant noise-level subtraction rule; linear function; output SNR; soft thresholding; speech quality;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20020990
