
emphasizing concept and adaptive expressions (e.g. longer pauses
following linguistic fillers). Finally, the retraction phase drives the
observed body-part to its initial/another rest position.
In the context of the PLATTOS system, the retraction phase is
generated after each movement phrase. As shown in Figure 2, a
movement phase is defined by its temporal features (duration), key-
utterance sequences, repetition, and by key-poses. The temporal
features define the duration of the phase. These features highly depend
on to the pronunciation rate and the accentuation of the utterances
spoken. The key-utterances (e.g. key-words, key-word sequence) ...