DocumentCode :
1102383
Title :
Comparative study of nonlinear time warping techniques in isolated word speech recognition systems
Author :
Waibel, A. ; Yegnanarayana, B.
Author_Institution :
Carnegie-Mellon University, Pittsburgh, PA, USA
Volume :
31
Issue :
6
fYear :
1983
fDate :
12/1/1983 12:00:00 AM
Firstpage :
1582
Lastpage :
1586
Abstract :
In this paper, the effects of two major design choices on the performance of an isolated word speech recognition system are examined in detail. They are: 1) the choice of a warping algorithm among the Itakura asymmetric, the Sakoe and Chiba symmetric, and the Sakoe and Chiba asymmetric, and 2) the size of the warping window to reduce computation time. Two vocabularies were used: the digits (zero, one,..., nine) and a highly confusable subset of the alphabet (b, c, d, e, g, p, t, v, z). The Itakura asymmetric warping algorithm appears to be slightly better than the other two for the confusable vocabulary. We discuss the reasons why the performance of the algorithms is vocabulary dependent. Finally, for the data used in our experiments, a warping window of about 100 ms appears to be optimal.
Keywords :
Acoustic signal processing; Algorithm design and analysis; Computer science; Databases; Signal processing algorithms; Space technology; Speech processing; Speech recognition; Testing; Vocabulary;
fLanguage :
English
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
0096-3518
Type :
jour
DOI :
10.1109/TASSP.1983.1164241
Filename :
1164241
Link To Document :
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