| Presentation | 2012-07-20 Voice activity detection using density ratio estimation of speech and noise Yuuki TACHIOKA, Toshiyuki HANAZAWA, Tomohiro NARITA, Jun ISHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we propose a robust voice activity detection (VAD) method that uses a density ratio model. For VAD under highly noisy environments, the likelihood ratio test (LRT) is effective. Conventional LRT constructs speech and noise models, calculates the likelihood of each model, and takes the ratio of those likelihoods to detect speech. Here, there are two problems. First, in LRT, it is ignored that the likelihood ratio of speech and noise model is required, not the likelihood of each model. The proposed method directly estimates the likelihood ratio without calculating each likelihood using an obtained density ratio model. Second, there is the problem of determining thresholds, which are used for determining whether speech or not and significantly affect VAD performance. We propose a method that automatically determines thresholds using clustering analysis. The experiments show that the proposed method is more effective than conventional methods especially under non-stationary noisy environments, and that thresholds can be automatically determined according to noise features. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Voice activity detection / Likelihood ratio test / Density ratio estimation / Noise robustness / Automatic threshold determination |
| Paper # | SP2012-54 |
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| Conference Information | |
| Committee | SP |
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| Conference Date | 2012/7/12(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| 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) | Voice activity detection using density ratio estimation of speech and noise |
| Sub Title (in English) | |
| Keyword(1) | Voice activity detection |
| Keyword(2) | Likelihood ratio test |
| Keyword(3) | Density ratio estimation |
| Keyword(4) | Noise robustness |
| Keyword(5) | Automatic threshold determination |
| 1st Author's Name | Yuuki TACHIOKA |
| 1st Author's Affiliation | Information Technology R&D Center, Mitsubishi Electric Corporation() |
| 2nd Author's Name | Toshiyuki HANAZAWA |
| 2nd Author's Affiliation | Information Technology R&D Center, Mitsubishi Electric Corporation |
| 3rd Author's Name | Tomohiro NARITA |
| 3rd Author's Affiliation | Information Technology R&D Center, Mitsubishi Electric Corporation |
| 4th Author's Name | Jun ISHI |
| 4th Author's Affiliation | Information Technology R&D Center, Mitsubishi Electric Corporation |
| Date | 2012-07-20 |
| Paper # | SP2012-54 |
| Volume (vol) | vol.112 |
| Number (no) | 141 |
| Page | pp.pp.- |
| #Pages | 6 |
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