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.
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. 2. The speech recognition system of claim 1 wherein the acoustic feature extraction apparatus comprises a logarithmic power spectrum analyzer.