Browsing by Author "Chiu, Tzu-Hsuan"

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Prosody-dependent Acoustic Modeling for Mandarin Speech Recognition
(2012)
Chiu, Tzu-Hsuan
;
Chiang, Chen-Yu
;
Liao, Yuan-Fu
;
Yang, Jyh-Her
;
Wang, Yih-Ru
A study on introducing prosodic information to acoustic modeling (AM) for speech recognition is reported in this paper. It extends the conventional context-dependent (CD) triphone HMM modeling approach to further consider the dependency of phone model on the break type of nearby inter-syllable boundary. Four break types are considered, including major break, minor break, normal non-break, and tightly-coupled non-break. In the training phase, break labeling is automatically accomplished by a Prosody Labeling and Modeling algorithm proposed previously. Then, prosody-and phonetic-dependent phone models are constructed by a standard decision tree-based context clustering of HMMs. The effectiveness of the new AM was examined on a Mandarin syllable recognition task. Experimental results showed that the new approach outperformed the conventional CD-AM on achieving better syllable recognition rate as well as on obtaining a more efficient syllable lattice with better compromise on complexity verse syllable coverage rate.