A Study on the Effect of Pitch on LPCC and PLPC Features for Children's ASR in Comparison to MFCC

In this work, following our previous studies, we study and quantify the effect of pitch on LPCC and PLPC features and explore their efficacy for children’s mismatched ASR in comparison to MFCC. Our analysis shows that, unlike MFCC, LPCC feature has no major influence of pitch variations. On the other hand, similar to MFCC, though PLPC is also found to be significantly effected by pitch variations but comparatively to a lesser extent. However, after explicit pitch normalization of children’s speech, MFCC is found to result in the best children’s speech recognition performance on adults’ speech trained models in comparison to LPCC and PLPC features.