tailieunhanh - Báo cáo khoa học: "PCFGs with Syntactic and Prosodic Indicators of Speech Repairs"

A grammatical method of combining two kinds of speech repair cues is presented. One cue, prosodic disjuncture, is detected by a decision tree-based ensemble classifier that uses acoustic cues to identify where normal prosody seems to be interrupted (Lickley, 1996). The other cue, syntactic parallelism, codifies the expectation that repairs continue a syntactic category that was left unfinished in the reparandum (Levelt, 1983). The two cues are combined in a Treebank PCFG whose states are split using a few simple tree transformations. . | PCFGs with Syntactic and Prosodic Indicators of Speech Repairs John Halea Izhak Shafranb Lisa Yungc Bonnie Dorrd Mary Harperde Anna Krasnyanskayaf Matthew Leaseg Yang Liuh Brian Roark Matthew Snoverd Robin Stewart7 a Michigan State University b c Johns Hopkins University d University of Maryland College Park e Purdue University f UCLA g Brown University h University of Texas at Dallas Oregon Health Sciences University j Williams College Abstract A grammatical method of combining two kinds of speech repair cues is presented. One cue prosodic disjuncture is detected by a decision tree-based ensemble classifier that uses acoustic cues to identify where normal prosody seems to be interrupted Lickley 1996 . The other cue syntactic parallelism codifies the expectation that repairs continue a syntactic category that was left unfinished in the reparandum Levelt 1983 . The two cues are combined in a Treebank PCFG whose states are split using a few simple tree transformations. Parsing performance on the Switchboard and Fisher corpora suggests that these two cues help to locate speech repairs in a synergistic way. 1 Introduction Speech repairs as in example 1 are one kind of disfluent element that complicates any sort of syntax-sensitive processing of conversational speech. 1 and the first kind of invasion of the first type of privacy seemed invaded to me The problem is that the bracketed reparan-dum region following the terminology of Shriberg 1994 is approximately repeated as the speaker The authors are very grateful for Eugene Charniak s help adapting his parser. We also thank the Center for Language and Speech processing at Johns Hopkins for hosting the summer workshop where much of this work was done. This material is based upon work supported by the National Science Foundation NSF under Grant No. 0121285. Any opinions findings and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the NSF. .