| Presentation | 2004/12/14 Removing Reflected Waves Using Delayed Wave Subtraction Combined with Spectral Subtraction Kenko Ohta, Masuzo Yanagida, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Proposed is a method of removing reflected waves from a mixed wave consisting of a source signal and reflected waves. The method is a kind of waveform subtraction referring to auto-correlation functions of multi channel speech signals assuming that a reflected wave has two parameters; path amplitude and delay time. The method estimates these parameters based on auto-correlation functions of signals received by microphones. The estimated delayed wave derived from the received wave is subtracted from the received wave using an estimated delay only for vocalic segments and spectral subtraction is applied to non-speech segments. The proposed method can be realized without prior knowledge about room characteristics or the target speech. Speech recognition rate for the signals picked up with 3 microphones in a reverberant environment is improved about 8% employing the proposed method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Reflected Wave / Delay Time / Amplitude / Auto-correlation Function / Spectral Subtraction |
| Paper # | NLC2004-57,SP2004-97 |
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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) |
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| Paper Information | |
| 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) | Removing Reflected Waves Using Delayed Wave Subtraction Combined with Spectral Subtraction |
| Sub Title (in English) | |
| Keyword(1) | Reflected Wave |
| Keyword(2) | Delay Time |
| Keyword(3) | Amplitude |
| Keyword(4) | Auto-correlation Function |
| Keyword(5) | Spectral Subtraction |
| 1st Author's Name | Kenko Ohta |
| 1st Author's Affiliation | Faculty of Engineering, Doshisha University() |
| 2nd Author's Name | Masuzo Yanagida |
| 2nd Author's Affiliation | Faculty of Engineering, Doshisha University |
| Date | 2004/12/14 |
| Paper # | NLC2004-57,SP2004-97 |
| Volume (vol) | vol.104 |
| Number (no) | 539 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |