Prosodic Aids to Speech Recognition: 7. Experiments on Detecting and Locating Phrase Boundaries
Final technical rept. 1 Sep 1974-31 Aug 1975
SPERRY UNIVAC ST PAUL MN DEFENSE SYSTEMS DIV
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Computer programs for detecting syntactic boundaries BOUND3 and locating stressed syllables STRESS have been supplied to ARPA contractors and incorporated into speech recognition facilities. Experiments were conducted on various timing cues that correlate with phonological and syntactic phrase boundaries, showing that 91 of the phonological phrase boundaries that were perceived by listeners who heard spectrally inverted speech could be detected from lengthened vowels and sonorants in phrase-final positions. Also, 95 of these perceived boundaries were evidenced by long time intervals between syllables. The interstress interval also provided a good measure of rate of speech, that correlated with error rates in automatic phonetic classification schemes.
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