Summary
2007 International Symposium on Nonlinear Theory and its Applications
2007
Session Number:19AM2-C
Session:
Number:19AM2-C-5
A blind restoration model for bone-conducted speech based on a linear prediction scheme
Thang Tat Vu, Masashi Unoki, Masato Akagi,
pp.449-452
Publication Date:2007/9/16
Online ISSN:2188-5079
DOI:10.34385/proc.41.19AM2-C-5
Summary:
Bone-conducted (BC) speech can be used instead of air-conducted (AC) speech for speech communication systems in extremely noisy environments. However, it has very poor sound quality and its intelligibility is degraded when transmitted through bone conduction. Therefore, blindly improving voice quality and the intelligibility of BC speech is a challenging topic. We propose a linear prediction (LP) scheme based blind-restoration model to improve voice quality and the intelligibility of BC speech. This LPbased method originates from the linear predictive concept, which regards speech signals as the representation of source and filter information. We evaluated the proposed model in comparison with other models to find out whether it could adequately improve voice quality and the intelligibility of BC speech, using objective measures (LSD, MCD, and LCD) and carrying out word intelligibility tests for Japanese words and modified rhyme tests for English words. The experimental results for objective and subjective evaluations proved the practicability of blind BC restoration.