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A Study on the Speaker Adaptation in CDHMM  

Kim, Gwang-Tae (Dept.of Electronics Electric Engineering, Sangmyung University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.39, no.2, 2002 , pp. 116-127 More about this Journal
Abstract
A new approach to improve the speaker adaptation algorithm by means of the variable number of observation density functions for CDHMM speech recognizer has been proposed. The proposed method uses the observation density function with more than one mixture in each state to represent speech characteristics in detail. The number of mixtures in each state is determined by the number of frames and the determinant of the variance, respectively. The each MAP Parameter is extracted in every mixture determined by these two methods. In addition, the state segmentation method requiring speaker adaptation can segment the adapting speech more Precisely by using speaker-independent model trained from sufficient database as a priori knowledge. And the state duration distribution is used lot adapting the speech duration information owing to speaker's utterance habit and speed. The recognition rate of the proposed methods are significantly higher than that of the conventional method using one mixture in each state.
Keywords
Speaker adaptation; speech recognition; speaker dependent; speaker independent; Viterbi algorithm;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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