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Accent morphing as a technique to improve the intelligibility of foreign-accented speech

Yanagisawa, K; Huckvale, M; (2007) Accent morphing as a technique to improve the intelligibility of foreign-accented speech. In: Proc. International Congress of Phonetic Sciences. : Saarbrücken, Germany.

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Abstract

Accent morphing aims to modify the accent of a speaker whilst maintaining speaker identity. A text- independent approach could be based on voice con- version systems which manipulate speaker identity through spectral mapping. However, it is not clear to what extent accent changes can be captured with spectral mapping alone. In this paper we imple- ment and evaluate a text-dependent accent morph- ing system capable of manipulating both spectral and prosodic features. We show how accent mor- phing can significantly improve the intelligibility of English-accented Japanese sentences to native Japanese listeners (from 57% to 84% words cor- rect). Analysis of the different processing condi- tions shows that much of the benefit of morphing comes from integrated changes to both spectrum and prosody. This suggests that text-independent mor- phing is unlikely to provide anything but a small in- crease in intelligibility.

Type:Proceedings paper
Title:Accent morphing as a technique to improve the intelligibility of foreign-accented speech
Event:International Congress of Phonetic Sciences
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Psychology and Language Sciences (Division of) > Speech, Hearing and Phonetic Sciences
UCL > School of Life and Medical Sciences > Faculty of Life Sciences

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