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本文目的在于讨论汉语普通话圆唇特征的定义问题。本研究从汉语普通话录像中提取出元音发音时关键帧的唇形内外轮廓线,并进一步计算得到唇圆度、宽度和开口度等参数,用于分析圆唇元音、非圆唇元音与上述参数之间的关系。实验结果表明,唇圆度和唇开口度并不具备区分圆唇元音和非圆唇元音的功能,而唇宽度具有区别意义的功能。完整发音过程可以分为张嘴与闭嘴两个阶段,二者有着不同的唇形运动模式。综合此二阶段唇形的变化规律,本文主张使用内外唇宽度之和为特征,用其变化表示圆展唇运动的动态过程。实验还发现普通话发音的唇部生理运动具有一定的随意性,但基本上总能保持同一发音人圆唇元音比非圆唇元音的唇宽度更窄这一特性。
The purpose of this paper is to discuss the definition of the Mandarin lip lip feature. In this study, we extracted the inner and outer contour lines of the lip of vowel pronunciation from Chinese Mandarin and further calculated the lip roundness, width and opening and other parameters to analyze the vowel of the round lip, the non-round vowel vowel Relationship with the above parameters. Experimental results show that lip roundness and lip opening do not have the function of distinguishing round vowels and non-round vowels, and the lip width has a distinguishing function. The process of complete pronunciation can be divided into mouth and mouth closed two stages, the two have different modes of lip movement. Based on the variation of the lip shape in the second stage, this paper advocates the use of the sum of the widths of the inner and outer lips as the feature, and the variation of the lip width indicates the dynamic process of the lip movement. The experiment also found that lip sounds in Putonghua were somewhat random, but basically kept the same vowel lip vowel narrower than that of non-round lip vowels.