Accession Number : ADA018442

Title :   Speech Perception.

Descriptive Note : Final technical rept.,

Corporate Author : PERCEPTION TECHNOLOGY CORP WINCHESTER MASS

Personal Author(s) : Ferber,Leon ; Yilmaz,Huseyin ; Killett,Henry ; Park,William ; Koprucu,Esber

Report Date : NOV 1975

Pagination or Media Count : 47

Abstract : A general approach to speech recognition is presented. The objective is to study and investigate the recognition of words as they appear in spoken phrases composed of context-free speech, using a small set of words. This effort is an extension of the work performed under contract F30602-73-C-0049. A method of segmentation is presented based on continuous processing of the input signal to detect plosives, fricatives and vowels. This is coupled with speaker tranformation and pattern matching algorithms to produce a word recognition system. This limited vocabulary word recognition system was used to evaluate various algorithms of consonant recognition and speaker transformations. The speaker transformations that reduce inter-speaker variations were tested using cooperative as well as non-cooperative speakers. Final evaluation was performed for a total of 10 speakers. Using the English digits spoken in a connected manner, speaker transformation and consonant recognition were evaluated. These programs were then combined to form a digit recognition system with an average correct recognition score of 95%. (Author)

Descriptors :   *Speech recognition, *Pattern recognition, *Perception(Psychology), Vocabulary, Word recognition, Phonetics, Algorithms, Transformations, Scoring, Energy, Waveforms, Vowels

Subject Categories : Linguistics
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE