The study to estimate the learning stage of pronunciation for hearing impaired subject from the digital video picture to speak

本研究尝试从数位视讯画面来评估听障者发音的学习阶段。用两个CCD摄像机拍摄受试者将发音器放在嘴唇上并说出40个单词的视频图像。嘴唇上的六个标记的每个位置由Move-tr/3D（Rimetry Co.的软件）估计。从正常受试者的实验结果可以看出，下面提到的十二种身体素质是有用的。(1)点A的横坐标（2）点A在x方向上的速度分量（3）点D的纵坐标（4）点A在y方向上的速度分量（5）线段AB的长度（距离AB）（6）距离AB的变化率（7）线段CD的长度（距离CD）（8）距离CD的变化率（9）角度CAD（θ CAD）（10）θ CAD的变化率（11）角度ADB（θ ADB）（12）θ ADB的变化率可以看出，对于（1），（3）、（5）、（7）、（9）和（11）的性质变化率的极值对元音的判别是有用的，而它们的性质变化率的极值对辅音的判别是有用的。就本研究而言，听障受试者的发音学习阶段不能用上述品质来估计。但发音的学习阶段，除了要看发音的质量外，还要看舌运动的质量。

The study is to try to estimate the learning stage et pronunciation for the hearing impaired subjeru from the digital video picture to speak. The video picture to record subject putting sic makers on the lip and speaking forty words with two CCD cameras was captured in the personal computer. Every position of six markers on the lips is estimated by Move-tr/3D (the software of Ribrary Co. From the result of experiment for the normal subject, it is seen that twelve physical qualities mentioned here under are useful. (1) The abscissa of the point A (2) The component of velocity of the point A in the x direction (3) The ordinate of the point D (4) The component of velocity of the point A in the y direction (5) The length of the segment AB (distance AB) (6)The change rate of the distance AB (7) The length of the segment CD (distance CD) (8) The change rate of the distance CD (9) The angle CAD (∠CAD) (10) The change rate of the ∠CAD (11) The angle ADB (∠ADB) (12) The change rate of the ∠ADB It is seen that the extreme value of physical qualities for (1),(3),(5),(7),(9), and (11) is useful to discriminate the vowel, and the extreme value of the change rate of their qualities is useful to discriminate the consonant. As for this study, the learning stage of pronunciation for the hearing impaired subject cannot be estimated by the above mentioned qualities. But the learning stage of pronunciation will be estimated accurately by the quality for the movement of the tongue in addition to their qualities.