Causal-Anticausal Decomposition of Speech using Complex Cepstrum for Glottal Source Estimation
Table 2: Table of synthesis parameter variation range.
['Pitch', '60:20:180 Hz']
The goal of this section is to study, on synthetic speech signals, the impact of the windowing effects on the causal-anticausal decomposition. It is one of the main contributions of this study to provide a parametric analysis of the windowing problem and provide guidelines for reliable complex cepstrum-based glottal flow estimation. The idea is to cover the diversity of configurations one could find in natural speech by varying all parameters over their whole range. Synthetic speech is produced according to the source-filter model by passing a synthetic train of Liljencrants-Fant (LF) glottal waves As the mean pitch in these utterances is about 100 Hz, it is reasonable to consider that the fundamental frequency should not exceed 60 and 180 Hz in continuous speech. Experiments in this section can then be seen as a proof of concept on synthetic male speech.