| Presentation | 1999/12/20 Asynchronous Transition HMM with Sequential Constraints Shigeki MATSUDA, 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) | We propose Asynchronous-Transiti on HMM(AT-HMM) with sequentially constrained state transitions among individual features. Previously, we proposed non-sequential AT-HMM that represents with a scalar-output HMM these quence of feature vectors whose components change a synchronously with each other. Sequential AT-HMMs inctroduces sequential constraints among asynchronized transitions to better represent the asynchrony among features. A new technique of"state tying along time"is introduced to realize the sequential AT-HMM structure. Sequential AT-HMMs gave approximately 20% and 40% lower error rates compared with conventional HMMs in phoneme and isolated word recognition experiments, respectively. To furtther improve the modeling ability of the sequential AT-HMM, we also introduce the Feature-Wise Successive State Splitting(FW-SSS) algorithm based on a concept of Feature-Wise Phoneme Environment Clustering(FW-PEC). The error rates were further reduced approximately by 10 points from those by the above sequential AT-HMM without FW-PEC. |
| Keyword(in Japanese) | (See Japanese page) |
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| Paper # | NLC99-98 |
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| Committee | NLC |
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| Conference Date | 1999/12/20(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| 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) | Asynchronous Transition HMM with Sequential Constraints |
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| 1st Author's Name | Shigeki MATSUDA |
| 1st Author's Affiliation | () |
| 2nd Author's Name | Mitsuru NAKAI |
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| 3rd Author's Name | Hiroshi SHIMODAIRA |
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| 4th Author's Name | Shigeki SAGAYAMA |
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| Date | 1999/12/20 |
| Paper # | NLC99-98 |
| Volume (vol) | vol.99 |
| Number (no) | 523 |
| Page | pp.pp.- |
| #Pages | 6 |
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