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KMID : 0917520020090040265
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Journal of Speech Sciences
2002 Volume.9 No. 4 p.265 ~ p.274
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An Automatic Segmentation System Based on HMM and Correction Algorithm
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Abstract
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In this paper we propose an automatic segmentation system that outputs the time alignmetn information of phoneme boundary using Viterbi search with HMM (Hidden Markov Model) and corrects these results by an UVS (unvoiced/voiced/silence) classifica-tion algorithm. We selecte a set of 39 monophones and a set of 647 extended phones of HMM models. For the UVS classification we use the feature parameters such as ZCR (Zero Crossing Rate), log energy, spectral distribution. The result of forced alignment using the etended phone set is 11% better than that of the monophone set. The UVS classification algorithm shows high performance to correct the segmentation results.
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