蒙古语标准话朗读话语韵律短语研究

Research on Prosodic Phrase of Reading Speech in Standard Mongolian

本研究结果表明:1.在蒙古语音调层面上存在着一个或多个相对独立、相对稳定和相对完整的音高变化模式,即音高曲拱。其分布特点为:在音高重音之前,呈逐步上升趋势;在音高重音附近,达到峰值;在音高重音之后,呈逐步下降趋势,并且这种下降趋势一般延续到韵律短语的结束位置;2.音高曲拱与韵律短语之间存在较强的相关性和同步性。其中,音高曲拱是韵律短语的音高表现形式,而韵律短语是音高曲拱的作用域,决定着音高曲拱的实现范围。根据音高曲拱可以把一个语句切分成一个或若干个相对独立完整的韵律短语;3.音高走势的突变可能是引起语音间断(停顿)的重要因素。因为韵律短语边界往往位于音高由低变高的拐点位置。音高曲线的这种急剧变化,为我们的韵律短语切分工作提供有效的声学线索;4.蒙古语韵律短语的平均长度一般为5个音节,2.5个词语,与汉语普通话韵律短语平均长度基本相等。

The experimental analysis was based on a corpus of Mongolian speech synthesis recorded by a female speaker. The results of the acoustical patterns and perception test showed that： 1） In general, a Mongolian sentence can be split into relatively independent and complete one or more pitch contours at the level of tone. Pitch generally rises step by step and reaches its peak near the pitch accent and then lowers gradually till the end of the pitch accent; 2） One pitch accent corresponds to one prosodic phrase in most cases, and Mongolian prosodic phrases can be segmented on the basis of pitch contour; 3） The appearance of apparent pause is a sufficient condition for the segmentation of prosodic phrase, but not a essential condition ; and 4） The average length of Mongolian prosodic phrase is about 5 syllables with 2.5 words, which is basically the same as Mandarin Chinese.