A generalized vocal tract model for pole-zero type linear prediction [speech processing]

The authors consider a generalized acoustic tube model of the vocal tract, relating it to the pole-zero type linear prediction. The generalization is done by including the nasal cavity for the modeling, thus forming a three-branched model. The transfer function is obtained from the generalized model by conglomerating one of the three branches to the branch section at the junction of the three branches. It is also discussed how find coefficients for the pole-zero type linear prediction from the voiced sounds. Also discussed is how to evaluate the reflection coefficients by connecting the pole-zero type linear prediction algorithm to the transfer function of the generalized model