| 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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| PDF Download Page | PDF download Page Link |
| 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 |
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| Conference Date | 1996/12/13(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
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| Paper Information | |
| Registration To | Natural Language Understanding and Models of Communication (NLC) |
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| 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 | |