The Effects of Syntactic Analysis on Word Recognition Accuracy

The utility and flexibility of a speech recognition system can be substantially expanded if it can accept sentence length utterances rather than single words. Simultaneously, accuracy can be greatly improved by exploiting the grammatical constraints of language on the input sentences.1-2-3 The purpose of this investigation is to establish, by means of a computer simulation, how much improvement in reliability can be obtained by using a particular optimal method for syntactic analysis in conjunction with an isolated word recognition system. This paper is in five sections. First we give a description of the method of syntax analysis under consideration. In the second section we describe the content and the semantic and grammatical structure of the problem domain to which we intend to apply the analysis. The third section is devoted to a description of the simulation, particularly of the acoustic recognizer and the procedure for generating random sentences. In the 1627 w x(t) WeL(G) ACOUSTIC RECOGNIZER W [dij] SYNTAX ANALYZER D (W)