Phoneme Set and Pronouncing Dictionary Creation for Large Vocabulary Continuous Speech Recognition of Vietnamese

This paper describes our study on solving two basic problems of large vocabulary continuous speech recognition (LVCSR) of Vietnamese, which can be used as a standard reference for Vietnamese researchers and other researchers who are interested in Vietnamese language. First, a standard phoneme set is proposed with its corresponding grapheme-to-phoneme map. This phoneme set is the core to solve other problems related to LVCSR of Vietnamese. Then the creation of standard pronouncing dictionary based on the grapheme-to-phoneme map and the analysis of Vietnamese syllable is also described. Finally, we present the results on LVCSR using different types of pronouncing dictionary, which show some interesting aspects of Vietnamese language such as the structure of Vietnamese syllable and the effect of tone in the relationship with syllable.

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