基于磁共振成像的汉语普通话舌尖调音建模

Modeling of the tongue tip in Standard Chinese using MRI

通过对汉语普通话磁共振成像数据的分析,对舌尖的形状和运动进行调音建模。建立了汉语普通话磁共振成像调音数据库,包括9个单元音和75个辅音变体。提取了发音器官在正中矢状面上的形状边缘;对舌头的形状边缘进行主成分分析,发现舌尖和舌体分开建模更为简洁;针对舌尖调音动作,用舌尖前伸(TTP)和舌尖上翘(TTR)两个调音参数来控制舌尖形状和动作,建立了舌尖的调音模型。

The tongue tip motion in Standard Chinese was modeled based on articulatory data from magnetic resonance imaging （MRI） images. An MRI articulatory database was developed for Standard Chinese, including 9 vowels and 75 consonant variants. Principle component analysis （PCA） of the tongue shape was then used to find articulatory factors. The results show that the tongue should be divided as the tongue tip and tongue body and modeled separately for more precise results. The tongue tip motion is modeled with two articulatory parameters for tongue tip protrude and tongue tip raise which represent the protruding/advancing and raising/retroflexing movements of the tongue tip.