语法信息与韵律结构的分析与预测

Syntactic Information and Analysis and Prediction of Prosody Structure

韵律结构的自动预测是高自然度文语转换(TTS)系统的关键组成部分,直接影响到合成语音的自然度和表现力。该文建立了一个同时具有语法信息与韵律结构标注的汉语语料库。在这一语料库的基础上,对汉语的韵律结构组成、韵律结构与语法语义之间的关系进行了分析,并进行了预测试验。研究发现,汉语的韵律结构虽与语法结构不同,但是有着密切的联系,韵律结构可以通过语法结构进行预测。韵律结构除与语法结构有关之外,还要受到语句语义的制约。

Automatic prosody structure prediction is a very important component in high quality Text-to-Speech sys terns which directly affect the naturalness and expressivity of synthesized speech. A text corpus with both syntactic and prosodic structures annotated is constructed. Based on the corpus, the composition of prosody structure and the relationship between syntactic and prosodic structures are analyzed, and a prediction experiment is carried out. The result shows that, though there are differences between the prosodic structure and the syntactic structure in Chi- nese, they have a close relationship the prosodic structure can be predicted by the syntactic structure. The prosodic structure is also affected by the semantic information of the sentence.