CUED Publications database

Joint modelling of voicing label and continuous F0 for HMM based speech synthesis

Yu, K and Young, S (2011) Joint modelling of voicing label and continuous F0 for HMM based speech synthesis. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings. pp. 4572-4575. ISSN 1520-6149

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Abstract

Fundamental frequency, or F0 is critical for high quality speech synthesis in HMM based speech synthesis. Traditionally, F0 values are considered to depend on a binary voicing decision such that they are continuous in voiced regions and undefined in unvoiced regions. Multi-space distribution HMM (MSDHMM) has been used for modelling the discontinuous F0. Recently, a continuous F0 modelling framework has been proposed and shown to be effective, where continuous F0 observations are assumed to always exist and voicing labels are explicitly modelled by an independent stream. In this paper, a refined continuous F0 modelling approach is proposed. Here, F0 values are assumed to be dependent on voicing labels and both are jointly modelled in a single stream. Due to the enforced dependency, the new method can effectively reduce the voicing classification error. Subjective listening tests also demonstrate that the new approach can yield significant improvements on the naturalness of the synthesised speech. A dynamic random unvoiced F0 generation method is also investigated. Experiments show that it has significant effect on the quality of synthesised speech. © 2011 IEEE.

Item Type: Article
Uncontrolled Keywords: continuous F0 modelling HMM based speech synthesis voicing classification
Subjects: UNSPECIFIED
Divisions: Div F > Machine Intelligence
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:57
Last Modified: 08 Dec 2014 21:45
DOI: 10.1109/ICASSP.2011.5947372