Soft thresholding for DCT speech enhancement
Sayeef Salahuddin, Shajid Islam, Md. Kamrul Hasan, Mujibur R. Khan · Electronics Letters · 2002
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 conventional constant noise-level subtraction rule. The experimental results show significant improvement in output SNR and quality as compared to recently reported results.