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In this paper, we present a statistical approach for dialogue act processing in the dialogue component of the speech-to-speech translation system VERBMOBIL. Statistics in dialogue processing is used to predict follow-up dialogue acts. As an application example we show how it supports repair when unexpected dialogue states occur. | Utilizing Statistical Dialogue Act Processing in Verbmobil Norbert Reithinger and Elisabeth Maier DFKI GmbH Stuhlsatzenhausweg 3 D-66123 Saarbriicken Germany reithinger maier Ddf ki. uni- sb. de Abstract In this paper we present a statistical approach for dialogue act processing in the dialogue component of the speech-to-speech translation system VERBMOBIL. Statistics in dialogue processing is used to predict follow-up dialogue acts. As an application example we show how it supports repair when unexpected dialogue states occur. 1 Introduction Extracting and processing communicative intentions behind natural language utterances plays an important role in natural language systems see e.g. Cohen et al. 1990 Hinkelman and Spackman 1994 . Within the speech-to-speech translation system VERBMOBIL Wahlster 1993 Kay et al. 1994 dialogue acts are used as the basis for the treatment of intentions in dialogues. The representation of intentions in the VERBMOBIL system serves two main purposes Utilizing the dialogue act of an utterance as an important knowledge source for translation yields a faster and often qualitative better translation than a method that depends on surface expressions only. This is the case especially in the first application of VERBMOBIL the on-demand translation of appointment scheduling dialogues. Another use of dialogue act processing in VERB-MOBIL is the prediction of follow-up dialogue acts to narrow down the search space on the analysis side. For example dialogue act predictions are employed to allow for dynamically adaptable language models in word recognition. This work was funded by the German Federal Ministry for Education Research and Technology BMBF in the framework of the Verbmobil Project under Grant 01IV101K 1. The responsibility for the contents of this study lies with the authors. Thanks to Jem Alexanders-son for valuable comments and suggestions on earlier drafts of this paper. Recent results e.g. Niedermair 1992 show a reduction of .
