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 F0 parameterization of glottalized tones for HMM-based Vietnamese TTS
Tác giả hoặc Nhóm tác giả: Duy Khanh Ninh, Yoichi Yamashita
Nơi đăng: The 16th Annual International Conference of ISCA (Interspeech), Dresden, Germany; Số: 2015;Từ->đến trang: 2202–2206;Năm: 2015
Lĩnh vực: Công nghệ thông tin; Loại: Báo cáo; Thể loại: Quốc tế
TÓM TẮT
A conventional HMM-based TTS system for Hanoi Vietnamese often suffers from the hoarse quality due
to the incomplete F0 parameterization of glottalized tones. As estimating F0 in glottalization is rather
problematic for usual F0 extractors, we propose a pitch marking algorithm where the pitch marks are
propagated from regular regions of speech signal to glottalized one, from which the complete F0
contour of a glottalized tone is derived. The proposed F0 parameterization scheme was confirmed to
significantly reduce the hoarseness whilst improve the tone naturalness of synthetic speech by both
objective and listening tests. The pitch marking algorithm works as a refinement step based on the
results of an F0 extractor. Therefore, the proposed scheme can be combined with any F0 extractor.
ABSTRACT
A conventional HMM-based TTS system for Hanoi Vietnamese often suffers from the hoarse quality due
to the incomplete F0 parameterization of glottalized tones. As estimating F0 in glottalization is rather
problematic for usual F0 extractors, we propose a pitch marking algorithm where the pitch marks are
propagated from regular regions of speech signal to glottalized one, from which the complete F0
contour of a glottalized tone is derived. The proposed F0 parameterization scheme was confirmed to
significantly reduce the hoarseness whilst improve the tone naturalness of synthetic speech by both
objective and listening tests. The pitch marking algorithm works as a refinement step based on the
results of an F0 extractor. Therefore, the proposed scheme can be combined with any F0 extractor.
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