Abstract
A speech understanding and dialog system has to cope with spontaneous speech (including, for example, hesitations and non-words) and common dialog phenomena (including, for example, elliptic references and changes of topic). Modeling of words by segmental units should be supported by suprasegmental units since valuable information is represented in the prosody of an utterance. A software system for flexible and efficient modeling of speech by segmental and suprasegmental units will be described. Results concerning the use of prosodic information for word recognition, phrase boundaries, and dialog acts will be given. Aspects of integrating these results into an operational dialog system will be discussed.
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