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ESCA - NATO/RSG 10 Workshop on
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ESCA - NATO/RSG 10 Workshop on
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This paper describes a study of how an existing, commercially successful telephone-based flight information service using small-vocabulary, isolated-word, speaker-independent speech recognition could be improved by using more advanced technology. Continuous speech recognition was introduced throughout, and the vocabulary was increased from around 14 words to almost 200, including the letters of the alphabet. The confidence with which an utterance is recognized is used to control the extent to which confirmations are required in the dialogue, and multiple interpretations can be offered. A "talkover facility" frees the system from the need to use beep prompts and allows a user to interrupt lengthy explanations and hop around spoken lists. The new system also exhibits a limited word-spotting ability. The result is a service that is much faster and more natural to use.
Bibliographic reference. Hunt, Melvyn J. (1993): "An advanced telephone-based flight information system", In AST-1993, 43-46.