Speaking In Shorthand -- A Syllable-Centric Perspective For Understanding Pronunciation Variation (1998)
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@MISC{Greenberg98speakingin,
author = {Steven Greenberg},
title = {Speaking In Shorthand -- A Syllable-Centric Perspective For Understanding Pronunciation Variation},
year = {1998}
}
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Abstract
Current-generation automatic speech recognition (ASR) systems model spoken discourse as a linear sequence of words and phones. Because it is unusual for every phone within a word to be pronounced in a standard ("canonical") way, ASR systems often depend on a multi-pronunciation lexicon to match an acoustic sequence with a lexical unit. Since there are, in practice, many different ways for a word to be pronounced, this standard approach adds a layer of complexity and ambiguity to the decoding process which, if modified, could potentially improve recognition performance. Systematic analysis of pronunciation variation in a corpus of spontaneous English discourse (Switchboard) demonstrates that the variation observed is systematic at the level of the syllable. Syllabic onsets are realized in canonical form far more frequently than either coda or nuclear constituents. Prosodic stress also plays an important role in pronunciation. The governing mechanism is likely to involve the informationa...







