Presentation 1996/12/13
Key-Phrase Detection and Verification for Flexible Speech Understanding
Tatsuya Kawahara, Chin-Hui Lee, Biing-Hwang Juang,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) We propose a novel speech understanding strategy based on combined detection and verification of semantically tagged key-phrases in spontaneous spoken utterances. Key-phrases are defined in a top-down manner so as to constitute semantic slots. Their detection directly leads to robust understanding. A phrase network realizes both a wide coverage and a reasonable constraint for detection. A subword-based verifier is then incorporated to reduce false alarms in detection and attach confidence measures of the detected phrases. This set of phrase confidence measures, when incorporated in a spoken dialogue system, forms a basis for designing intelligent speech interfaces that accept only verified key-phrases and reprompt users to clarify unspecified or unrecognized portions. Several forms of confidence measures based on subword-level tests are investigated. The proposed approach was tested on field data collected from real-world trial applications. The combined detection and verification strategy drastically improves the accuracy in handling out-of-grammar utterances over the conventional decoding approaches while maintaining the performance for in-grammar utterances.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) speech recognition / speech understanding / spoken dialogue processing / word spotting / utterance verification / key-phrase detection
Paper # NLC96-55,SP96-86
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Conference Information
Committee NLC
Conference Date 1996/12/13(1days)
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Paper Information
Registration To Natural Language Understanding and Models of Communication (NLC)
Language ENG
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Key-Phrase Detection and Verification for Flexible Speech Understanding
Sub Title (in English)
Keyword(1) speech recognition
Keyword(2) speech understanding
Keyword(3) spoken dialogue processing
Keyword(4) word spotting
Keyword(5) utterance verification
Keyword(6) key-phrase detection
1st Author's Name Tatsuya Kawahara
1st Author's Affiliation Dept. of Information Science Kyoto University()
2nd Author's Name Chin-Hui Lee
2nd Author's Affiliation Bell Laboratories
3rd Author's Name Biing-Hwang Juang
3rd Author's Affiliation Bell Laboratories
Date 1996/12/13
Paper # NLC96-55,SP96-86
Volume (vol) vol.96
Number (no) 420
Page pp.pp.-
#Pages 8
Date of Issue