基于韵律规则的基频曲线预测模型

汉语语音合成中基频曲线(F0 曲线)预测是决定合成语音声调自然度的关键因素,为了使生成的基频曲线过渡自然,提出应用连接段基频曲线模式连接各音节的方法.连接段和音节基频曲线模式使用聚类、分析修正的方法获得,相互问有重叠性,应用时根据参数来确定选取区域,进行连接.通过实验过程中分析总结得到的规则确定基频曲线模式参数.实际应用于 PSOLA 语音合成系统后,经实验证明合成语音声调自然度明显提升.

Fundamental frequency contour prediction based on prosodic rules

The fundamental frequency contour(F0 contour) prediction is the key problem to improve the naturalness of synthesized speech.For the purpose of making the F0 contour more consistent,the method using F0 contour templates of linkage section is given.The F0 contour templates of linkage sections and syllables are generated by using clustering analysis.However the templates of linkage sections and syllables are overlapped each other,they can be used by adjusting parameters and getting the right sections to connect each other.Theparameters are obtained by the prosodic rules extracted from the experiments.Finally,it is proved to be effective in improving the naturalness of synthesized speech when applying this method to a PSOLA speech synthesis.