Patent US 4,156,868

A syntactic analyzer recognizes a series of spoken words as one of a set of predetermined sequences of prescribed words defined by a state sequence array of state transition signals representing state linked prescribed words. Each sequence corresponds to a selected plurality of linked state transition signals ending in a final state. For each word position of the series, a set of signals representative of the acoustic correspondence between the position word and the array prescribed words is generated. A cumulative correspondence signal is produced from the array state transition signals and the correspondence signals. Upon termination of the last word position, the sequence having the closest cumulative correspondence to the spoken word series is identified.