藏语韵律单元的时长与音高研究

A Study on the Durations and Pitches of Tibetan Prosodic Units

本文在小型藏语单句语音库的基础上,通过韵律标注出三层韵律结构单元:音节、韵律词和韵律短语,并统计了不同韵律单元内部及其边界处的音节时长和基频数据,统计结果表明:其一,韵律边界处边界前音节出现延长现象,大的韵律单元其边界前音节的延长程度也较大,边界后音节则没有系统的变化规律。其二,各韵律层边界处的基频重置既可能发生正重置也可能发生负重置,基频重置程度与韵律层级大小呈正相关。

This article labels out three levels of prosodic units on the basis of a small-scaled singular sentence speech database,namely syllables,prosodic words and prosodic phrases.It also calculates the durations and frequencies of the different prosodic units and syllables near them.The research findings are as follow: 1.the syllables before the prosodic units are prolonged,and the bigger the prosodic units are,the longer the syllables before them.But there is not a fixed pattern for the variations of the syllables after the prosodic units.2.The reset of the F0 near the different levels of prosodic units may be both positive and negative,and there is a positive relation between the degree of F0 reset and the level of prosodic units.