As one of indispensable capacities for viable robotic service to human, there will be included natural interaction with human by means of speech, gesture, haptic display, and even cooperative manipulation. Several human-robot interface and/or interaction technologies have been proposed for development of such interaction capacity in ICAR 07. Koch et al propose that a robot has to serve as interaction partner to give information and/or control various devices in ambient environment over a unified speech interface. For this, they integrate a speech engine into mobile service robots for lab tour guide and food information service, where the speech engine includes several functional components such as registration of dialogs, parser for dialog files, speech synthesis and recognition, dialog processing engine, and callback.
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