tailieunhanh - Báo cáo khoa học: "A Dialogue System with Contextually Appropriate Spoken Output Intonation"

We demonstrate the production of spoken output with contextually appropriate intonation in the information-state based dialogue system GoDiS. We exploit the context representation in the information state to determine the information structure of system utterances, which we use to control the intonation of synthesized spoken output. | A Dialogue System with Contextually Appropriate Spoken Output Intonation Ivana Kruijff-Korbayova1 Elena Karagjosova1 University of the Saarland Germany korbay kepa elka @ Kepa J. Rodríguez1 Stina Ericsson2 2University of Gothenburg Sweden stinae@ Abstract We demonstrate the production of spoken output with contextually appropriate intonation in the information-state based dialogue system GoDiS. We exploit the context representation in the information state to determine the information structure of system utterances which we use to control the intonation of synthesized spoken output. 1 Introduction Producing spoken output with contextually appropriate intonation is one of the challenges for flexible dialogue systems with dynamically constructed output and synthesized speech. It is a well known fact that intonation reflects the relation of an utterance to the context and that contextually inappropriate intonation may have negative effect on intelligibility or lead to confusion. We demonstrate improvements of contextual appropriateness of English and German intonation in the GoDiS system. Intonation is controlled by information structure which is determined from the context representation in the information state of the system using the information-state update approach to dialogue. This note is structured as follows. In 2 we give an overview of GoDiS and its information-state update approach. In 3 we introduce the information structure partitioning we employ and the rules we use to determine it from the information state. In 4 we describe the generation of spoken output with contextually varied intonation in GoDiS using the Festival and Mary text-to-speech synthesis systems. In 5 we summarize and indicate our further research plans. 2 GoDiS GoDiS Gothenburg Dialogue System is an experimental dialogue system implemented using the TrindiKit a toolkit for implementing dialogue move engines and dialogue systems based on the information-state .

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