A Speech Parameter Generation Algorithm Considering Global Variance for HMM-Based Speech Synthesis

Speech parameter generation algorithm considering global variance for HMM-based speech synthesis

This paper describes a novel parameter generation algorithm for the HMM-based speech synthesis. The conventional algorithm generates a trajectory of static features that maximizes an output probability of a parameter sequence consisting of the static and dynamic features from HMMs under an actual constraint between the two features. The generated trajectory is often excessively smoothed due to ...

A State Duration Generation Algorithm Considering Global Variance for HMM-based Speech Synthesis

The speech parameter generation algorithm considering global variance (GV) for HMM-based speech synthesis proved to be effective against the over-smoothing problem. In this paper this idea is extended to the generation of state duration. A GV model on syllable duration is proposed and a state duration generation algorithm considering this GV model is presented in details. By improving the GV li...

Modeling of Speech Parameter Sequence Considering Global Variance for HMM-Based Speech Synthesis

A speech parameter generation algorithm using local variance for HMM-based speech synthesis

This paper proposes a parameter generation algorithm using local variance (LV) constraint of spectral parameter trajectory for HMM-based speech synthesis. In the parameter generation process, we take account of both the HMM likelihood of speech feature vectors and a likelihood for LVs. To model LV precisely, we use dynamic features of LV with context-dependent HMMs. The objective experimental r...

Speech parameter generation algorithms for HMM-based speech synthesis

This paper derives a speech parameter generation algorithm for HMM-based speech synthesis, in which speech parameter sequence is generated from HMMs whose observation vector consists of spectral parameter vector and its dynamic feature vectors. In the algorithm, we assume that the state sequence (state and mixture sequence for the multi-mixture case) or a part of the state sequence is unobserva...