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Rosaria Silipo Steven Greenberg

By International Computer Science


The role of duration, amplitude and fundamental frequency of syllabic vocalic nuclei is investigated for marking prosodic stress in spontaneous American English discourse. Local maxima of di#erent evidence variables, implemented as combinations of the three basic parameters # duration, amplitude and pitch #, are supposed to be related with prosodic stress. As reference, two di#erent subsets from the OGI English stories database were manually marked in terms of prosodic stress bytwo di#erent trained linguists. The ROC curves, built on the training examples, show that both transcribers grant a major role to the amplitude and duration rather than to the pitch of the vocalic nuclei. More complex evidence variables, involving a product of the three basic parameters, allow around 80# primary stressed and 77# unstressed syllables to be correctly recognized in the test #les of both transcribers' datasets. The agreementbetween the two transcribers on a set of common #les supplies only slightly..

Year: 2007
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