This module is more flexible. Two different CART trees can be used to predict `accents' and `endtones'. Although at present this module is used for an implementation of the ToBI intonation labelling system it could be used for many different types of intonation system.
The target module for this method uses a Linear Regression model to
predict start mid-vowel and end targets for each syllable using
arbitrarily specified features. This follows the work described in
black96. The LR models are held as as described below
See Linear regression. Three models are used in the variables
f0_lr_start, f0_lr_mid and f0_lr_end.