Accession Number : AD0773182

Title :   Automatic Recognition of Continuous Speech: Further Development of a Hierarchical Strategy.

Descriptive Note : Final rept. 28 Jun 72-30 Aug 73,

Corporate Author : ROCKWELL INTERNATIONAL CORP ANAHEIM CALIF ELECTRONICS RESEARCH DIV

Personal Author(s) : Paul,J. E. ; Rabinowitz,A. S. ; Riganati,J. P. ; Vitola,V. A. ; Griffith,M. L.

Report Date : NOV 1973

Pagination or Media Count : 178

Abstract : ACT PERIOD HAS BEEN PRIMARILY DEVOTED TO THE FOLLOWING MAJOR TASKS: (1) implementation of a digital software spectral analysis procedure based on Fast Fourier Transform techniques; (2) development of a clustering procedure for the purpose of obtaining steady-state phonetic referents; (3) modification of segmentation and dual classification algorithms to promote compatibility of these stages with front-end processing and the sublanguage; (4) development of an improved transeme classification technique involving 'don't care' states in the feature vector; (5) implementation of a revised procedure for phoneme-to-grapheme translation based on global search of phonetic paths; (6) incorporation of second-order transition constraints in the phonetic lexicon for the purpose of eliminating phonologically invalid paths; (7) use, for evaluation purposes of a sublanguage possessing a more diverse syntactic structure including declarative, interrogative, and imperative sentences. (Modified author abstract)

Descriptors :   *Speech recognition, Automatic, Spectrum analysis, Fourier transformation, Clustering, Computer programming, Phonetics, Syntax, Signal processing, Classification, Algorithms

Subject Categories : Computer Programming and Software
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE