1. A speech recognition system for recognizing utterances belonging to a pre-established set of allowable candidate utterances using acoustic speech signals and selected concomitant dynamic visual facial feature motion between selected facial features associated with acoustic speech generation, comprising: a. an acoustic feature extraction apparatus for converting signals representative of acoustic speech into a corresponding acoustic feature vector set of signals; b. a dynamic visual feature extraction apparatus for converting signals representative of the selected concomitant dynamic visual facial feature motion associated with acoustic speech generation into a corresponding visual feature vector set of signals; and c. a time delay neural network classifying apparatus for generating a conditional probability distribution of the allowable candidate speech utterances by accepting and operating on a set of current and time delayed dynamic acoustic feature and visual feature vector sets respectively supplied by the acoustic and visual feature extraction apparatus.