| Presentation | 2012-08-01 Study on power envelope subtraction based on Modulation Transfer Function Yang LIU, Masashi UNOKI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A method for restoring the power envelope from the noisy reverberant speech has been previously proposed by the authors. This method is based on the concept of modulation transfer function (MTF) and does not require the impulse responses and noise conditions in the room acoustics to be measured. The proposed method consists of two parts: power envelope subtraction and power envelope dereverberation. This method suppresses the effects of reverberation and noise on the power envelopes by restoring the smeared MTF. However, this has a problem that the power envelope subtraction can only reduce the mean of noise power envelope without removing the fluctuations of them. In this paper, we improve an MTF-based power envelope subtraction by incorporating Kalman filter to solve the problem. We have carried out simulations in various noise conditions to evaluate the improved method. Evaluation results showed that the improved method can effectively reduce the mean as well as fluctuations of noise on the power envelope. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Modulation Transfer Function / Modulation Spectrum / Kalman filter / Linear prediction / Power Envelope Subtraction |
| Paper # | EA2012-58 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2012/7/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on power envelope subtraction based on Modulation Transfer Function |
| Sub Title (in English) | |
| Keyword(1) | Modulation Transfer Function |
| Keyword(2) | Modulation Spectrum |
| Keyword(3) | Kalman filter |
| Keyword(4) | Linear prediction |
| Keyword(5) | Power Envelope Subtraction |
| 1st Author's Name | Yang LIU |
| 1st Author's Affiliation | School of Information Science, Japan Advanced Institute of Science and Technology() |
| 2nd Author's Name | Masashi UNOKI |
| 2nd Author's Affiliation | School of Information Science, Japan Advanced Institute of Science and Technology |
| Date | 2012-08-01 |
| Paper # | EA2012-58 |
| Volume (vol) | vol.112 |
| Number (no) | 171 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |