Abstract
The goals of this study were to evaluate the synthesis of visible speech that was based on 3-D motion data using second-order isomorphism. To do this, word stimuli were generated for perceptual discrimination and identification tasks. Discrimination trials were based on word-pairs that were predicted to be at four levels of perceptual dissimilarity. Results from the discrimination tasks indicated that visual synthetic speech perception maintained the dissimilarity structure of visual natural speech perception. This study demonstrated that the relatively sparse 3-D representations of face motion could be used to synthesize visual speech that perceptually approximate visual natural speech, suggesting that synthesizer development and psychophysics can benefit mutually when the goals are aligned.
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