Summary: | An Embodied Conversation Agent (ECA) is a computer interface designed to simulate human face-to-face conversation with its users, through the production of synthesized or prerecorded speech combined with an humanoid embodiment: a representation, either physical or visual, of a body capable of producing some portion of the nonverbal behaviors associated with speech, such as mouth movements, eye movements, head movements, hand gestures, facial expressions, and body posture. A
key research problem in the design and implementation of realistic ECAs is generating the range of verbal and nonverbal behavior present in human conversation with appropriate frequency, timing, and quality.
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