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PART|I Signal Processing, Modelling and Related Mathematical Tools
context-oriented distribution clustering for parameter tying. This
has motivated several research teams to make a very promising
step, by considering the speech synthesis problem as a statistical
analysis/sampling problem.
In the so-called HMM-based speech synthesis approach, imple-
mented in [57], speech is described as the acoustic realisation of
a sequence of phonemes. Each phoneme is modelled by a 3-state
HMM. Each state emits spectral feature vectors (typically MFCCs)
with emission probabilities given by multivariate Gaussians associ-
ated to the leaves of a context clustering