The BBN/HARC spoken language understanding system

Authors:
Madeleine Bates;Robert Bobrow;Pascale Fung;Robert Ingria;Francis Kubala;John Makhoul;Long Nguyen;Richard Schwartz;David Stallard
Affiliations:
BBN Systems and Technologies, Cambridge, MA;BBN Systems and Technologies, Cambridge, MA;BBN Systems and Technologies, Cambridge, MA;BBN Systems and Technologies, Cambridge, MA;BBN Systems and Technologies, Cambridge, MA;BBN Systems and Technologies, Cambridge, MA;BBN Systems and Technologies, Cambridge, MA;BBN Systems and Technologies, Cambridge, MA;BBN Systems and Technologies, Cambridge, MA
Venue:
ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: speech processing - Volume II
Year:
1993

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Benchmark tests for the DARPA Spoken Language Program

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Abstract

We describe the design and performance of a complete spoken language understanding system currently under development at BBN. The system, dubbed HARC (Hear And Respond to Continuous speech), successfully integrates state-of-the-art speech recognition and natural language understanding subsystems. The system has been tested extensively on a restricted airline travel information (ATIS) domain with a vocabulary of about 2000 words. HARC is implemented in portable, high-level software that runs in real time on today's workstations to support interactive online human-machme dialogs. No special purpose hardware is required other than an A/D converter to digitize the speech. The system works well for any native speaker of American English and does not require any enrollment data from the users. We present results of formal DARPA tests in Feb. '92 and Nov. '92.