Fig. 6From: Transforming an embodied conversational agent into an efficient talking head: from keyframe-based animation to multimodal concatenation synthesisExamples of the maximum variation (one direction) of some articulatory parameters driving the avatar. a lips1 corresponds to lip protrusion; b tongue2 corresponds to the flattening-bunching movement, c tongue1 corresponds to the posterior extent of a tongue front-back movement, d tongue3 corresponds to the peak of a tongue tip vertical movementBack to article page