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Improving speech recognition by explicit modeling of phone deletions

Authors Ko, Yu Ting HKUST affiliated (currently or previously)
Mak, Brian Kan Wing View this author's profile
Issue Date 2010
Source ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing, Dallas, Texas, USA , 2010, p. 4858-4861
Summary In a paper published by Greenberg in 1998, it was said that in conversational speech, phone deletion rate may go as high as 12% whereas syllable deletion rate is about 1%. The finding prompted a new research direction of syllable modeling for speech recognition. To date, the syllable approach has not yet fulfilled its promise. On the other hand, there were few attempts to model phone deletions explicitly in current ASR systems. In this paper, fragmented word models were derived from well-trained cross-word triphone models, and phone deletion was implemented by skip arcs for words consisting of at least four phonemes. An evaluation on CSR-II WSJ1 Hub2 5K task shows that even with this limited implementation of phone deletions in read speech, we obtained a word error rate reduction of 6.73%. ©2010 IEEE.
ISSN 1520-6149
ISBN 978-1-4244-4296-6
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Language English
Format Conference paper
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