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http://dx.doi.org/10.7776/ASK.2013.32.2.167

Classification of Diphthongs using Acoustic Phonetic Parameters  

Lee, Suk-Myung (School of Electrical and Electronic Engineering, Yonsei University)
Choi, Jeung-Yoon (School of Electrical and Electronic Engineering, Yonsei University)
Publication Information
The Journal of the Acoustical Society of Korea / v.32, no.2, 2013 , pp. 167-173 More about this Journal
Abstract
This work examines classification of diphthongs, as part of a distinctive feature-based speech recognition system. Acoustic measurements related to the vocal tract and the voice source are examined, and analysis of variance (ANOVA) results show that vowel duration, energy trajectory, and formant variation are significant. A balanced error rate of 17.8% is obtained for 2-way diphthong classification on the TIMIT database, and error rates of 32.9%, 29.9%, and 20.2% are obtained for /aw/, /ay/, and /oy/, for 4-way classification, respectively. Adding the acoustic features to widely used Mel-frequency cepstral coefficients also improves classification.
Keywords
Diphthong; Diphthong classification; Acoustic phonetic parameter; Speech recognition;
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