EXAMPLE-BASED ERROR RECOVERY STRATEGY FOR SPOKEN DIALOG SYSTEM….pdfVIP

EXAMPLE-BASED ERROR RECOVERY STRATEGY FOR SPOKEN DIALOG SYSTEM Cheongjae Lee, Sangkeun Jung, Donghyeon Lee, and Gary Geunbae Lee Pohang University of Science and Technology Department of Computer Science and Engineering Pohang, South Korea lcj80, hugman, semko, gblee@postech.ac.kr ABSTRACT make its own errors which are mainly due to the lack of cov- erage of the semantic domain when faced with strange in- Error handling has become an important issue in spoken di- puts. Finally, the semantic representation provided to the dia- alog systems. We describe an example-based approach to log manager might also cause system response errors. These detect and repair errors in an example-based dialog model- errors appear across all domains and dialog genres. ing framework. Our approach to error recovery is focused on the re-phrase strategy with a system and a task guidance To avoid these errors, a basic solution is to improve the to help the novice users to re-phrase well-recognizable and accuracy and robustness of the recognition and understanding well-understandable input. The dialog system gives possible process. However, the spoken dialog system should also be utterance templates and contents related to the current situa- able to adopt mechanisms for detecting and repairing poten- tion when errors are detected. An empirical evaluation of the tial errors at the conversational level since the development of car navigation system shows that our approach is effective to the perfect conventional systems is impossible. The goal of