1. A continuous speech recognition system for recognizing a succession of continuously spoken words with reference to a plurality of preselected reference words, each reference word having an intra-word characteristic point approximately at a point of bisection of said reference word, said system comprising: means for memorizing a plurality of discrete demi-word pair reference patterns, each reference pattern being given by a sequence of parameters characteristic of a demi-word pair which lies between the intra-word characteristic point of a preceding reference word and the intra-word characteristic point of a succeeding reference word, said preceding and said succeeding reference words being continuously pronounced; and means connected to said reference pattern memorizing means to be operable as a finite-state automaton to recognize said succession by using a pattern concatenation of optimum demi-word pair reference patterns which are selected from said discrete demi-word pair reference patterns and concatenated at least at an interface, said automaton being for controlling said concatenation so that no contradiction occurs at every interface.