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Reducing Speech Noise for Patients with Dysarthria in Noisy Environments

Woo KYEONG SEONG, Ji HUN PARK, Hong KOOK KIM

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Summary :

Dysarthric speech results from damage to the central nervous system involving the articulator, which can mainly be characterized by poor articulation due to irregular sub-glottal pressure, loudness bursts, phoneme elongation, and unexpected pauses during utterances. Since dysarthric speakers have physical disabilities due to the impairment of their nervous system, they cannot easily control electronic devices. For this reason, automatic speech recognition (ASR) can be a convenient interface for dysarthric speakers to control electronic devices. However, the performance of dysarthric ASR severely degrades when there is background noise. Thus, in this paper, we propose a noise reduction method that improves the performance of dysarthric ASR. The proposed method selectively applies either a Wiener filtering algorithm or a Kalman filtering algorithm according to the result of voiced or unvoiced classification. Then, the performance of the proposed method is compared to a conventional Wiener filtering method in terms of ASR accuracy.

Publication
IEICE TRANSACTIONS on Information Vol.E97-D No.11 pp.2881-2887
Publication Date
2014/11/01
Publicized
Online ISSN
1745-1361
DOI
10.1587/transinf.2014EDP7130
Type of Manuscript
PAPER
Category
Speech and Hearing

Authors

Woo KYEONG SEONG
  Gwangju Institute of Science and Technology (GIST)
Ji HUN PARK
  Samsung Electronics
Hong KOOK KIM
  Gwangju Institute of Science and Technology (GIST)

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