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An introduction to the Chinese speech recognition front-end of the NICT/ATR multi-lingual speech translation system

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5 Author(s)
Jinsong Zhang ; Knowledge Creating Communication Research Center, National Institute of Information and Communications Technology, 2-2-2 Keihanna Science City, Kyoto 619-0288, Japan; ATR Spoken Language Translation Research Laboratories, 2-2-2 Keihanna Science City, Kyoto 619-0288, Japan ; Takatoshi Jitsuhiro ; Hirofumi Yamamoto ; Xinhui Hu
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This paper introduces several important features of the Chinese large vocabulary continuous speech recognition system in the NICT/ATR multi-lingual speech-to-speech translation system. The features include: (1) a flexible way to derive an information rich phoneme set based on mutual information between a text corpus and its phoneme set; (2) a hidden Markov network acoustic model and a successive state splitting algorithm to generate its model topology based on a minimum description length criterion; and (3) advanced language modeling using multi-class composite N-grams. These features allow a recognition performance of 90% character accuracy in tourism related dialogue with a real time response speed.

Published in:

Tsinghua Science and Technology  (Volume:13 ,  Issue: 4 )