| Presentation | 2002/12/12 Normalizing the Acoustic Qualities of Monophones in an Utterance Muhammad GHULAM, Takashi FUKUDA, Tsuneo NITTA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we expand our previously proposed HMM-SM-based speech recognition system to a connected digit recognition task by exploring the effect of normalizing the acoustic qualities of the monophones in an utterance and compare it with a number of HMM-based systems with utterance-level normalization, word-level normalization, monophone-level normalization and without normalization. In the proposed HMM-SM-based system, an HMM-based classifier classifies the N-best hypotheses (word candidates), and then an SM (Subspace Method)-based verifier tests the hypotheses after applying the monophone score normalization. Experimental results performed on a connected digit recognition task showed that the word correct rate and the word accuracy rate were significantly improved by the proposed method from 96.3% to 98.7% and from 95.7% to 98.2%, respectively, compared with the convenient HMM-based classifier with utterance-level normalization. The proposed method also showed high performance over the other HMM-based systems that we have compared. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Speech Recognition / HMM / Normalization of Acoustic Quality / Subspace Method |
| Paper # | NLC2002-45 |
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| Conference Information | |
| Committee | NLC |
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| Conference Date | 2002/12/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice 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) | Normalizing the Acoustic Qualities of Monophones in an Utterance |
| Sub Title (in English) | |
| Keyword(1) | Speech Recognition |
| Keyword(2) | HMM |
| Keyword(3) | Normalization of Acoustic Quality |
| Keyword(4) | Subspace Method |
| 1st Author's Name | Muhammad GHULAM |
| 1st Author's Affiliation | Graduate School of Engineering, Toyohashi University of Technology() |
| 2nd Author's Name | Takashi FUKUDA |
| 2nd Author's Affiliation | Graduate School of Engineering, Toyohashi University of Technology |
| 3rd Author's Name | Tsuneo NITTA |
| 3rd Author's Affiliation | Graduate School of Engineering, Toyohashi University of Technology |
| Date | 2002/12/12 |
| Paper # | NLC2002-45 |
| Volume (vol) | vol.102 |
| Number (no) | 527 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |