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Zdeněk Hanzlíček and Jindřich Matoušek : On Using Warping Function for LSFs Transformation in a Voice Conversion System . Proceedings of the 9th International Conference on Signal Processing, ICSP '08, vol. 3, IEEE Press, Beijing, China, 2008.

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Abstract

In this paper, a new approach to line spectral frequencies transformation is introduced and employed in the voice conversion framework. This approach stems from the fact that LSFs are some specific points on the frequency axis and their positions determine the shape of the spectral envelope. Thus, they could be transformed directly by frequency axis warping. Two warping functions were designed specially for LSFs and compared with the traditional GMM-based conversion function. Listening tests and mathematical evaluation revealed that speech transformed by using proposed warping functions is of higher quality and does not suffer from oversmoothing which is common for GMM-based transformation. On the other hand, the speaker identity is slightly better transformed by GMM-based conversion. However, it is possible to combine these two approaches to obtain a compromise between quality and speaker identity.

Detail of publication

Title: On Using Warping Function for LSFs Transformation in a Voice Conversion System
Author: Zdeněk Hanzlíček ; Jindřich Matoušek
Language: English
Date of publication: 1 Oct 2008
Year: 2008
Type of publication: Papers in proceedings of reviewed conferences
Book title: Proceedings of the 9th International Conference on Signal Processing, ICSP '08
Číslo vydání: 3
ISBN: 978-1-4244-2178-7
Publisher: IEEE Press
Address: Beijing, China
Date: 26 Oct 2008 - 29 Oct 2008
2008-11-06 09:55:47 / 2009-01-14 13:57:17 /

Keywords

voice conversion, warping function

BibTeX

@INPROCEEDINGS{ZdenekHanzlicek_2008_OnUsingWarping,
 author = {Zden\v{e}k Hanzl\'{i}\v{c}ek and Jind\v{r}ich Matou\v{s}ek},
 title = {On Using Warping Function for LSFs Transformation in a Voice Conversion System},
 year = {2008},
 publisher = {IEEE Press},
 address = {Beijing, China},
 volume = {3},
 booktitle = {Proceedings of the 9th International Conference on Signal Processing, ICSP '08},
 ISBN = {978-1-4244-2178-7},
 url = {http://www.kky.zcu.cz/en/publications/ZdenekHanzlicek_2008_OnUsingWarping},
}