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TheTutorialandResearchWorkshoponPerceptionandInteractiveTechnologies (PIT 2006) is the continuation of a successful series of workshops that started withanISCATutorialandResearchWorkshoponMultimodalDialogueSystems in1999. Thisworkshopwasfollowedbyasecondonefocusingonmobiledialogue systems (IDS 2002) and a third one exploring the role of a?ect in dialogue (ADS 2004). All workshops took place at Kloster Irsee in Bavaria and attracted participants from both sides of the Atlantic as well as from Asia. Giventhestateofongoingresearchinperceptiveinterfaces,wefoundittimely to organize a Tutorial and Research Workshop on Perception and Interactive Technologies (PIT 2006) at Kloster Irsee in Germany. Due to its interdisciplinary nature, the workshop attracted submissions from researchers with very di?erent backgrounds, such as computer science, neur- ogy, medicine, bioinformatics and engineering. Overall, PIT 2006 embodied 16 long papers, 4 short papers and 6 demonstration papers. The programme was enhanced by an industrial session. Enhancing interfaces with perceptive capabilities is a necessary prerequisite to render human-computer communication more natural and engaging. Papers representedatthePIT2006workshopfocusonabroadrangeofperceptionte- nologies from head pose and eye gaze tracking in order to guide the users' level of attention to the analysis of speech and physiological data in order to acquire information on their emotional state. Furthermore, attempts are being made to integrate information from various input channels as well as from the situative context to compensate for errors and to resolve ambiguities. The workshop - persfocus notonlyontheinput side,but alsoexplorehowto guidetheoutputof interactivesystems by perceptiveprinciples.

Artificial intelligence. Robotics. Simulation. Graphics --- Computer. Automation --- beeldverwerking --- informatica --- robots

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This book constitutes the refereed proceedings of the 4th IEEE Tutorial and Research Workshop on Perception and Interactive Technologies for Speech-Based Systems, PIT 2008, held in Kloster Irsee, Germany, in June 2008. The 37 revised full papers presented together with 1 invited keynote lecture were carefully selected from numerous submissions for inclusion in the book. The papers are organized in topical sections on multimodal and spoken dialogue systems, classification of dialogue acts and sound, recognition of eye gaze, head poses, mimics and speech as well as combinations of modalities, vocal emotion recognition, human-like and social dialogue systems, and evaluation methods for multimodal dialogue systems.

Artificial intelligence. Robotics. Simulation. Graphics --- Computer. Automation --- Translation science --- Linguistics --- beeldverwerking --- informatica --- maatschappij --- vertalen --- linguïstiek --- robots