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To memorize or to predict: Prominence labeling in conversational speech

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nenkovaetalhlt07.pdf (85.04Kb)
Date
2007
Author
Nenkova, Ani
Brenier, Jason
Kothari, Anubha
Calhoun, Sasha
Whitton, Laura
Beaver, David
Jurafsky, Daniel
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Abstract
The immense prosodic variation of natural conversational speech makes it challenging to predict which words are prosodically prominent in this genre. In this paper, we examine a new feature, accent ratio, which captures how likely it is that a word will be realized as prominent or not. We compare this feature with traditional accent prediction features (based on part of speech and N-grams) as well as with several linguistically motivated and manually labeled information structure features, such as whether a word is given, new, or contrastive. Our results show that the linguistic features do not lead to significant improvements, while accent ratio alone can yield prediction performance almost as good as the combination of any other subset of features. Moreover, this feature is useful even across genres; an accent-ratio classifier trained only on conversational speech predicts prominence with high accuracy in broadcast news. Our results suggest that carefully chosen lexicalized features can outperform less fine-grained features.
URI
http://hdl.handle.net/1842/2007
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