| Presentation | 1997/12/12 Rejection by Confidence Measure Based on Likelihood Difference Between Competing Phonemes Takatoshi JITSUHIRO, Satoshi TAKAHASHI, Kiyoaki AIKAWA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The rejection of unknown words is important in improving the performance of speech recognition. The anti-keyword model method can reject unknown words with high accuracy in small vocabulary and specified task. Unfortunately, it is either inconvenient or impossible to apply if vocabulary words in the vocabulary change frequently. We propose a new method for task independent rejection of unknown words, where a new phoneme confidence measure is used to verify partial utterances. It is used to verify each phoneme while locating candidates, and the whole utterance is verified by a phonetic typewriter. This method can improve the accuracy of verification in each phoneme. Tests show that the proposed method improves the recognition rate by 4% compared to the conventional algorithm at equal error rates. Furthermore, a 3% improvement is obtained by training acoustic models with the MCE algorithm. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | speech recognition / rejection / unknown word / confidence measure / MCE |
| Paper # | NLC97-43 |
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| Conference Information | |
| Committee | NLC |
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| Conference Date | 1997/12/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
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| Paper Information | |
| Registration To | Natural Language Understanding and Models of Communication (NLC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Rejection by Confidence Measure Based on Likelihood Difference Between Competing Phonemes |
| Sub Title (in English) | |
| Keyword(1) | speech recognition |
| Keyword(2) | rejection |
| Keyword(3) | unknown word |
| Keyword(4) | confidence measure |
| Keyword(5) | MCE |
| 1st Author's Name | Takatoshi JITSUHIRO |
| 1st Author's Affiliation | NTT Human Interface Laboratories() |
| 2nd Author's Name | Satoshi TAKAHASHI |
| 2nd Author's Affiliation | NTT Human Interface Laboratories |
| 3rd Author's Name | Kiyoaki AIKAWA |
| 3rd Author's Affiliation | NTT Human Interface Laboratories |
| Date | 1997/12/12 |
| Paper # | NLC97-43 |
| Volume (vol) | vol.97 |
| Number (no) | 440 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |