Given some initial scores F U and F P for utterance and prosody nodes respectively, the update rule is given by: U and F (t) P integrate the initial importance associated with their respective nodes with the score obtained by between-layer propagation at a given iteration t. Hence, the scores in each layer are mutually updated by the scores from the other layer, iteratively.
utterances that exhibit more pronounced signs of important prosodic feature are progressively scored higher.