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International Journal of Speech Technology
Published in: International Journal of Speech Technology 3/2016

06-06-2016

Wavelet energy based voice activity detection and adaptive thresholding for efficient speech coding

Authors: Shijo M. Joseph, Anto P. Babu

Published in: International Journal of Speech Technology | Issue 3/2016

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Abstract

During the last five decades, extensive researches have been carried out in the field of speech compression, which has resulted in various techniques for speech coding. Researchers have been in full swing for more efficient speech coding and their effort is still continuing in different parts of the world. In this paper we are proposing an alternative method for better speech coding. In the proposed technique we use discrete wavelet transform to decompose the signal and wavelet energy is used to differentiate between active voice region and silence region in the speech signal. Depending upon the region’s status the system, different thresholding strategies have been chosen which leads to a better compression without any loss of speech intelligibility. The proposed method is evaluated in terms of qualitative and quantitative parameters. In this paper we also propose an alternative parameter for MOS values which is here after known as System Recognition Rate.
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Metadata
Title
Wavelet energy based voice activity detection and adaptive thresholding for efficient speech coding
Authors
Shijo M. Joseph
Anto P. Babu
Publication date
06-06-2016
Publisher
Springer US
Published in
International Journal of Speech Technology / Issue 3/2016
Print ISSN: 1381-2416
Electronic ISSN: 1572-8110
DOI
https://doi.org/10.1007/s10772-014-9240-x

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