Research on co-articulation of Tibetan Xiahe Dialect Stops Based on Face Motion Capture

Abstract:
This paper uses facial motion capture technology to collect the dynamic data of the speaker's lip shape, and conducts research on the dynamic lip shape features of the CV structure stop in Tibetan Xiahe dialect. It mainly analyzes the influence of different consonants on the forward effects of the same vowel in the syllable. The experimental results show that the co-articulation in the syllable in the phonetic changes has different effects on the four indexes of lip shape. The width of the outer lip is greatly affected by the forward effect of the stop sound in co-articulation. The height of the outer lip and the protrusion of the upper lip have a little effect on the forward synergetic pronunciation. The experimental results of the upper and lower lip protrusion show that the upper lip protrusion is less affected by the pre-stop. After the blocking is removed, the protrusion value of each sound of the lower lip changes greatly, indicating that the protrusion of the lower lip is greatly affected by the pre-stop sound in the co-articulation. On the whole, the stop sound in the CV structure of Tibetan Xiahe dialect has a little forward effect in the co-articulation. The experimental results are consistent with the relevant conclusions in different languages obtained by many scholars through other experimental methods. If the opening of the mouth is small and the loudness is small, the range of influence is small.