DMCA
Sub-lexical Dialogue Act Classification in a Spoken Dialogue System Support for the Elderly with Cognitive Disabilities
Cached
Download Links
BibTeX
@MISC{Sadohara_sub-lexicaldialogue,
author = {Ken Sadohara and Hiroaki Kojima and Takuya Narita and Misato Nihei and Minoru Kamata and Shinichi Onaka and Yoshihiro Fujita and Takenobu Inoue},
title = {Sub-lexical Dialogue Act Classification in a Spoken Dialogue System Support for the Elderly with Cognitive Disabilities},
year = {}
}
Share
 |
 |
 |
 |
||
OpenURL
Abstract
This paper presents a dialogue act classification for a spoken dialogue system that delivers necessary information to elderly subjects with mild dementia. Lexical features have been shown to be effective for classification, but the automatic transcription of spontaneous speech demands expensive language modeling. Therefore, this paper proposes a classifier that does not require language modeling and that uses sub-lexical features instead of lexical features. This classifier operates on sequences of phonemes obtained by a phoneme recognizer and exhaustively analyzes the saliency of all possible sub-sequences using a support vector machine with a string kernel. An empirical study of a dialogue corpus containing elderly speech showed that the sub-lexical classifier was robust against the poor modeling of language and it performed better than a lexical classifier that used hidden Markov models of words. Index Terms: dialogue acts, support vector machines, string kernels, spontaneous speech, elderly speech, dementia
Keyphrases
sub-lexical dialogue act classification spoken dialogue system support cognitive disability lexical feature elderly speech support vector machine dialogue act classification necessary information elderly subject possible sub-sequences automatic transcription sub-lexical classifier spoken dialogue system poor modeling dialogue act lexical classifier mild dementia empirical study phoneme recognizer language modeling index term spontaneous speech hidden markov model string kernel dialogue corpus sub-lexical feature
