In this thesis, procedures of natural spoken human-machine dialog are consistently modeled with graphical models using the example of automatic flight information systems. The recognition of semantic phrases of words from the speech recognizer is realized by a two-stage graphical model, which combines stochastic and rule-based methods. To develop strategies for a natural dialog flow from these word phrases, a discrete hidden Markov model is used. The system can adjust fast to modified situations and remains flexibly deployable due to the evaluation of the dialog strategy in run time.
The developed graphical models are analyzed theoretically, training algorithms are derived and experiments for each procedure are carried out. Finally, possibilities for realizations based on software agents and their expandability are pointed out.
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In this thesis, procedures of natural spoken human-machine dialog are consistently modeled with graphical models using the example of automatic flight information systems. The recognition of semantic phrases of words from the speech recognizer is realized by a two-stage graphical model, which combines stochastic and rule-based methods. To develop strategies for a natural dialog flow from these word phrases, a discrete hidden Markov model is used. The system can adjust fast to modified situations...
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