Pitch and tone´s modeling in parametric trajectory model

It is described in this paper for the application of pitch/tone information in the parametric trajectory model. Pitch as a dynamic feature and its contours—tone as a segmental-level feature are deserved their own particular characteristics, which match case of parametric trajectory model better compared with MFCC and energy. Here we give an improved pitch extraction algorithm and especially the “total” and “parallel” integration methods to combine these information with the base model. In the experiment of Mandarin connected digit recognition, we achieve 22.87% and 33.54% error reduction respectively for them, moreover when combined with these two methods, 38.72% error reduction is obtained.