基于统计韵律模型的汉语语音合成系统的研究

Study of Chinese Speech Synthesis System Based on Statistic Prosody Model

本文论述了采用统计模型进行汉语韵律层级结构分析和韵律建模的思路 ,在此基础上建立了汉语语音合成系统。其中 ,本文还仔细阐述了韵律代价函数的构造 ,及其参数的自动训练算法。同时 ,论文还分析了韵律特征间相互作用对音节基元选取的影响 ,并最终实现了一个连续语流中用于汉语语音合成的音节基元选取模型。测试表明了本文提出的基于统计模型的韵律层级分析和韵律建模思路 ,能够较好应用于汉语语音合成系统的构造 。

The paper describes the methods of Chinese Prosodic Hierarchy Analysis and Prosody Modeling,which are based on statistic algorithm.Meanwhile,the paper also describes the prosody cost function and corresponding training method for the parameters.Furthermore,the interaction among the prosodic features is analyzed in respond to its influence in speech unit selection procedure.Based on these,a Chinese Syllable Unit Selection Model was generated for the spontaneous speech synthesis system.The tests show that the method described in the paper is much suitable to the constitution of Speech Synthesis System and improves the naturalness of the synthesis result a lot.