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Efficient Speech Enhancement Approach based on Minima Controlled Recursive Averaging through Modified Map Criterion using Hidden Markov Model
International Journal of Computer Applications
© 2012 by IJCA Journal
Volume 44 - Number 14
Year of Publication: 2012
|
10.5120/6333-8708 |
M Mathivanan and S.chenthur Pandian. Article: Efficient Speech Enhancement Approach based on Minima Controlled Recursive Averaging through Modified Map Criterion using Hidden Markov Model. International Journal of Computer Applications 44(14):27-34, April 2012. Full text available. BibTeX
@article{key:article,
author = {M. Mathivanan and S.chenthur Pandian},
title = {Article: Efficient Speech Enhancement Approach based on Minima Controlled Recursive Averaging through Modified Map Criterion using Hidden Markov Model},
journal = {International Journal of Computer Applications},
year = {2012},
volume = {44},
number = {14},
pages = {27-34},
month = {April},
note = {Full text available}
}
Abstract
Speech coding has become one of the most essential techniques in telecommunications and in the multimedia infrastructure. Existing speech coding techniques are applicable only for stationary environment and degrade the speech quality. This paper proposes a novel speech coding technique with better speech quality through MCRA and modified MAP. Maximum A Posteriori (MAP) criterion is extensively utilized in the statistical model-based Minima Controlled Recursive Averaging (MCRA) approaches. In the traditional MAP criterion, the inter-frame correlation of the voice activity is not taken into account. A novel technique to enhance the MCRA depending on the modified MAP via two-state Hidden Markov Model (HMM) is presented in this paper. With the proposed MAP criterion, the decision rule is obtained by clearly integrating the a priori, a posteriori, and inter-frame correlation information into the Likelihood Ratio Test (LRT).
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