Title:	On using warping function for LSFs transformation in a voice conversion system
Authors:	Hanzlíček, Zdeněk Matoušek, Jindřich
Citation:	HANZLÍČEK, Zdeněk; MATOUŠEK, Jindřich. On using warping function for LSFs transformation in a voice conversion system. In: Proceedings of the 9th international conference on signal processing, ICSP '08, 26.10.2008 - 26.11.2008. 3rd ed. Beijing: IEEE Press, 2008, p. [1-4]. ISBN 978-1-4244-2178-7.
Issue Date:	2008
Publisher:	IEEE Press
Document type:	článek article
URI:	http://www.kky.zcu.cz/cs/publications/ZdenekHanzlicek_2008_OnUsingWarping http://hdl.handle.net/11025/16948
ISBN:	978-1-4244-2178-7
Keywords:	hlasová konverze;deformační funkce
Keywords in different language:	voice conversion;warping function
Abstract in different language:	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.
Rights:	© Zdeněk Hanzlíček - Jindřich Matoušek
Appears in Collections:	Články / Articles (KIV)

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