Abstract
Techniques developed for the acoustic analysis of speech have been applied in an analogous manner to video speech signals. This new field of investigation is referred to as videophonetics. New techniques that have been developed include video speech synthesis by means of cartoons or by concatenation of prerecorded diphones and triphones, analysis of phonetic contrasts in lipreading by interleaving frames of paired videorecordings, spatial high-pass and low-pass filtering of lipreading signals using bivariate Fourier transforms, and automating (in order to improve objectivity) the method of continuous discourse tracking for evaluating communication ability using lipreading and/or a sensory aid. [Research by NINCDS.]
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