Sixth International Conference on Spoken Language Processing
A new method was developed to synthesize fundamental frequency (F0) contours of Chinese sentences based on a functional model, formerly developed by the authors. The model has an advantage in that decomposition process to phrase and tone components is not necessary. The developed method decides the F0 contour type for each word based on a set of tone-sandhi rules, and then shapes these word F0 contour types into the phrasal F0 contour taking focus conditions into account The tone-sandhi rules are formulated as 19 bi- and 198 tri-tone-sandhi contouremes in a parametric form, which are obtained by quantitative analysis of 84 di-, 538 tri and 938 tetra-syllable words. Each contoureme can realize F0 contours in 3 different ranges: normal, depressed and expanded. The focus conditions decide range type for each word and a peak reference-line for a phrase. When generating phrasal F0 contour, the model parameter values of contouremes, selected using tone sequence and range type information, are adjusted so that F0 peaks appear along the peak reference-line. Experimental results confirmed the validity of the proposed method.
Bibliographic reference. Ni, Jinfu / Hirose, Keikichi (2000): "Synthesis of fundamental FDrequency contours of standard Chinese sentences from tone sandhi and focus conditions", In ICSLP-2000, vol.3, 195-198.