DocumentCode
1495663
Title
Very low rate speech coding using temporal decomposition
Author
Ghaemmaghami, S. ; Sridharan, S.
Author_Institution
Electron. Res. Center, Sharif Univ. of Technol., Tehran, Iran
Volume
35
Issue
6
fYear
1999
fDate
3/18/1999 12:00:00 AM
Firstpage
456
Lastpage
457
Abstract
A method for encoding the spectral characteristics of speech, at rates below 180 bit/s, using hierarchical temporal decomposition (HTD) is proposed. A set of the log-area-ratio (LAR) parameters, extracted from a given block of speech, are approximated through Gaussian interpolation between the most-steady frames detected by the HTD. This results in a smaller set of parameters which are encoded using vector quantisation. It is shown that the same spectral distortion is obtained with the new coder at a rate of 180 bit/s as that using a scalar quantisation, TD-based coder, at 600 bit/s
Keywords
Gaussian processes; interpolation; speech coding; vector quantisation; 0 to 180 bit/s; Gaussian interpolation; hierarchical temporal decomposition; log-area-ratio parameters; most-steady frames; spectral characteristics; spectral distortion; speech coding; vector quantisation;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19990316
Filename
756389
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