The Usage of Phoneme Duration Information for Rejecting Garbage Sentences

소음문장 제거를 위한 음소지속시간 사용

  • Published : 2003.05.01

Abstract

In this paper, we study the usage of phoneme duration information for rejection garbage sentence. First, we build a phoneme duration modeling in a speech recognition system based on dicicion tree state tying, We assume that phone duration has a Gamma distribution. Next, we build a verification module in which word-level confidence measure is used. Finally, we make a comparative study on phoneme duration with speech DB obtained from the live system. This DB consistes of OOT(out-of-task) and ING(in-grammar) utterences. the usage of phone duration information yields that OOT recognition rate is improved by 46% and that another 8.4% error rate is reduced when combined with utterence verification module.

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