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http://dx.doi.org/10.7776/ASK.2013.32.3.279

Global Soft Decision Based on Improved Speech Presence Uncertainty Tracking Method Incorporating Spectral Gradient  

Kim, Jong-Woong (Department of Electronic Engineering, Hanyang University)
Chang, Joon-Hyuk (Department of Electronic Engineering, Hanyang University)
Publication Information
The Journal of the Acoustical Society of Korea / v.32, no.3, 2013 , pp. 279-285 More about this Journal
Abstract
In this paper, we propose a novel speech enhancement method to improve the performance of the conventional global soft decision which is based on the spectral gradient method applied to the ratio of a priori speech absence and presence probability value (q). Conventional global soft decision scheme used a fixed value of q in accordance with the hypothesis assumed, but the proposed algorithm is a technique for improving the speech absence probability which is applied adaptively variable value of q according to the speech presence or absence in the previous two frames and the conditions of the spectral gradient value. Experimental results show that the proposed improved global soft decision method based on the spectral gradient method yields better results compared to the conventional global soft decision technique based on the performance criteria of the ITU-T P. 862 PESQ (Perceptual Evaluation of Speech Quality).
Keywords
Global soft decision; Spectral gradient; Value of q;
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