| Presentation | 2004/12/14 Two-stage Noise Spectra Estimation and Regression based In-car Speech Recognition using Single Distant Microphone Weifeng LI, Katunobu ITOU, Kazuya TAKEDA, Fumitada ITAKURA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we present a two-stage noise spectra estimation approach. After the first-stage noise estimation using the improved minima controlled recursive averaging (IMCRA) method, the second-stage noise estimation is performed by employing a maximum a posteriori (MAP) noise amplitude estimator. We also develop a regression-based speech enhance system by approximating the clean speech with the estimated noise and original noisy speech. Evaluation experiments show that the proposed two-stage noise estimation method results in lower estimation error for all test noise types. Compared to original noisy speech, the proposed regression-based approach obtains an average relative word error rate (WER) reduction of 65% in our isolated word recognition experiments conducted in 12 real car environments. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | maximum a posteriori (MAP) estimation / spectral subtraction / speech enhancement / multi-layer perceptron / speech recognition |
| Paper # | NLC2004-77,SP2004-117 |
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| Conference Information | |
| Committee | NLC |
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| Conference Date | 2004/12/14(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 | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Two-stage Noise Spectra Estimation and Regression based In-car Speech Recognition using Single Distant Microphone |
| Sub Title (in English) | |
| Keyword(1) | maximum a posteriori (MAP) estimation |
| Keyword(2) | spectral subtraction |
| Keyword(3) | speech enhancement |
| Keyword(4) | multi-layer perceptron |
| Keyword(5) | speech recognition |
| 1st Author's Name | Weifeng LI |
| 1st Author's Affiliation | Graduate School of Engineering, Nagoya University() |
| 2nd Author's Name | Katunobu ITOU |
| 2nd Author's Affiliation | Graduate School of Information Science, Nagoya University |
| 3rd Author's Name | Kazuya TAKEDA |
| 3rd Author's Affiliation | Graduate School of Information Science, Nagoya University |
| 4th Author's Name | Fumitada ITAKURA |
| 4th Author's Affiliation | Faculty of Science and Technology, Meijo University, Meijo University |
| Date | 2004/12/14 |
| Paper # | NLC2004-77,SP2004-117 |
| Volume (vol) | vol.104 |
| Number (no) | 539 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |