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KMID : 1022420140060040133
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Phonetics and Speech Sciences
2014 Volume.6 No. 4 p.133 ~ p.139
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Bilingual Voice Conversion Using Frequency Warping on Formant Space
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Chae Yi-Geun
Yun Young-Sun
Jung Jin-Man
Eun Seong-Bae
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Abstract
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This paper describes several approaches to transform a speaker’s individuality to another’s individuality using frequencywarping between bilingual formant frequencies on different language environments. The proposed methods are simple andintuitive voice conversion algorithms that do not use training data between different languages. The approaches find thewarping function from source speaker’s frequency to target speaker’s frequency on formant space. The formant spacecomprises four representative monophthongs for each language. The warping functions can be represented by piecewise linearequations, inverse matrix. The used features are pure frequency components including magnitudes, phases, and line spectralfrequencies (LSF). The experiments show that the LSF-based voice conversion methods give better performance than othermethods.
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KEYWORD
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Bilingual Voice Conversion, Formant Space, Frequency Warping, LSF-based Voice Conversion
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