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Automatic Extraction of Tone Command Parameters for the Model of F0 Contour Generation for Standard Chinese
Wentao GU Keikichi HIROSE Hiroya FUJISAKI
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2004/05/01
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Section on Speech Dynamics by Ear, Eye, Mouth and Machine)
model for F0 contour generation, automatic parameter extraction, Standard Chinese, tone command pattern,
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The model for the process of F0 contour generation, first proposed by Fujisaki and his coworkers, has been successfully applied to Standard Chinese, which is a typical tone language with a distinct feature that both positive and negative tone commands are required. However, the inverse problem, viz., automatic derivation of the model parameters from an observed F0 contour of speech, cannot be solved analytically. Moreover, the extraction of model parameters for Standard Chinese is more difficult than for Japanese and English, because the polarity of tone commands cannot be inferred directly from the F0 contour itself. In this paper, an efficient method is proposed to solve the problem by using information on syllable timing and tone labels. With the same framework as for the successive approximation method proposed for Japanese and English, the method presented here for Standard Chinese is focused on the first-order estimation of tone command parameters. A set of intra-syllable and inter-syllable rules are constructed to recognize the tone command patterns within each syllable. The experiment shows that the method works effectively and gives results comparable to those obtained by manual analysis.