| Presentation | 1998/12/10 A New Normalization Method Using Local Acoustic Information of HMMs for Speaker Verification Toshihiro Isobe, Junichi Takahashi, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A new cohort normalization method is described for HMM based speaker verification. In the proposed method, cohort models are synthesized on the basis of the similarity of local acoustic features between speakers. The similarity can be determined using acoustic information lying in model components such as phonemes, states, and the Gaussian distributions of HMMs. With the method, the synthesized models can provide an effective normalizing score for various observed measurements because the difference between the individual reference model and synthesized cohort models is statistically reduced through fine evaluation of acoustic similarity in model structure level. In the experiments using telephone speech of 100 speakers, the Equal Error Rate(EER)can be drastically reduced from 1.30%(obtained by the conventional speaker-selection based cohort normalization)to 0.70%(obtained by the proposed method on distribution-based selection)in open test(reference speaker : 25, impostor : 75), in which the other speakers than the reference speaker were used as impostors. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Speaker verification / Score normalization / Local acoustic information |
| Paper # | NLC98-41,SP98-105 |
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| Conference Information | |
| Committee | NLC |
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| Conference Date | 1998/12/10(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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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) | A New Normalization Method Using Local Acoustic Information of HMMs for Speaker Verification |
| Sub Title (in English) | |
| Keyword(1) | Speaker verification |
| Keyword(2) | Score normalization |
| Keyword(3) | Local acoustic information |
| 1st Author's Name | Toshihiro Isobe |
| 1st Author's Affiliation | Laboratory for Information Technology, NTT DATA CORPORATION() |
| 2nd Author's Name | Junichi Takahashi |
| 2nd Author's Affiliation | Laboratory for Information Technology, NTT DATA CORPORATION |
| Date | 1998/12/10 |
| Paper # | NLC98-41,SP98-105 |
| Volume (vol) | vol.98 |
| Number (no) | 460 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |