Speaker adaptive voice source modeling with applications to speech coding and processing

We discuss the use of low-dimensional physical models of the voice source for speech coding and processing applications. class of waveform-adaptive dynamic glottal models and parameter identification procedures are illustrated. The model and the dentification procedures are assessed by addressing signal transformations on recorded speech, achievable by fitting the model to the ata, and then acting on the physically oriented parameters of the voice source. The class of models proposed provides in principle tool for both the estimation of glottal source signals, and the encoding of the speech signal for transformation purposes. The pplication of this model to time stretching and to fundamental frequency control (pitch shifting) is also illustrated. The experiments how that copy synthesis is perceptually very similar to the target, and that time stretching and “pitch extrapolation” effects can be btained by simple control strategies. 2014 Elsevier Ltd. All rights reserved.