| Presentation | 2001/12/13 Vocal Tract Length Normalization Using Linear Transformation based on Maximum Likelihood Estimation Jun ROKUI, MITSURU Nakai, Hiroshi SHIMODAIRA, Shigeki SAGAYAMA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Vocal tract length normalization (VTLN) is one of the popular speaker adaptation techniques for speech recognition. The present study proposes a new VTLN algorithm in which expectation-maximization(EM) based parameter adaptation of HMM to vocal tract length is achieved in the mel-cepstral domain by utilizing a linear transformation model. Compared to other existing approaches based on bi-linear transformation for VTLN where a specific non-linear frequency warping function is employed in the spectrum domain and parameter adaptation of HMM is carried out in the cepstral domain, the proposed approach assumes a linear frequency warping with a single scaling factor and equivalent operation is modeled in the mel-cepstral domain by using a first order Taylor series approximation. The proposed scheme demonstrates significant improvement of recognition performance in a speaker independent word recognition task. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Vocal Tract Length Normalization / Linear Transformation / Maximum Likelihood Estimation / Speaker Adaptation / Speaker Normalization |
| Paper # | NLC2001-52,SP2001-87 |
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| Conference Information | |
| Committee | SP |
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| Conference Date | 2001/12/13(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 | Speech (SP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Vocal Tract Length Normalization Using Linear Transformation based on Maximum Likelihood Estimation |
| Sub Title (in English) | |
| Keyword(1) | Vocal Tract Length Normalization |
| Keyword(2) | Linear Transformation |
| Keyword(3) | Maximum Likelihood Estimation |
| Keyword(4) | Speaker Adaptation |
| Keyword(5) | Speaker Normalization |
| 1st Author's Name | Jun ROKUI |
| 1st Author's Affiliation | Japan Advanced Institute of Science and Technology, Hokuriku. Dept of Information Science() |
| 2nd Author's Name | MITSURU Nakai |
| 2nd Author's Affiliation | Japan Advanced Institute of Science and Technology, Hokuriku. Dept of Information Science |
| 3rd Author's Name | Hiroshi SHIMODAIRA |
| 3rd Author's Affiliation | Japan Advanced Institute of Science and Technology, Hokuriku. Dept of Information Science |
| 4th Author's Name | Shigeki SAGAYAMA |
| 4th Author's Affiliation | The University of Tokyo. Graduate School of Information Science and Technology |
| Date | 2001/12/13 |
| Paper # | NLC2001-52,SP2001-87 |
| Volume (vol) | vol.101 |
| Number (no) | 522 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |