| Presentation | 2000/10/17 Speech Noise Reduction System Based on Modified DFT Pair Isao Nakanishi, Kennsaku Fujii, Yoshio Itoh, Yutaka Fukui, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents a speech noise reduction system based on the modified DFT pair. By using the modified DFT, a noisy speech signal is decomposed into its composing harmonic signals. Each harmonic signal is processed through the signal and the noise level detectors. When the harmonic signal increases, the signal level detector directly transfers the variation of the input to the output. When the harmonic signal decreases, the signal level detector slowly tracks the input variation by using the averaging circuit with large time constant. The noise level detector consists of the another averaging circuit which has two large time constants. Even when the harmonic signal suddenly changes, the noise level detector tracks such variation slowly by using larger time constant. The amount of noise can be detected regardless of the voice existence. The realization and efficiency are confirmed through the computer simulations using speech signal. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Noise reduction / Modified DFT pair / Signal level detector / Noise level detector |
| Paper # | DSP2000-126, ICD2000-119, IE2000-71 |
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| Conference Information | |
| Committee | IE |
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| Conference Date | 2000/10/17(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 | Image Engineering (IE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Speech Noise Reduction System Based on Modified DFT Pair |
| Sub Title (in English) | |
| Keyword(1) | Noise reduction |
| Keyword(2) | Modified DFT pair |
| Keyword(3) | Signal level detector |
| Keyword(4) | Noise level detector |
| 1st Author's Name | Isao Nakanishi |
| 1st Author's Affiliation | Faculty of Education & Regional Sciences, Tottori University() |
| 2nd Author's Name | Kennsaku Fujii |
| 2nd Author's Affiliation | Fujitsu Laboratories Ltd. |
| 3rd Author's Name | Yoshio Itoh |
| 3rd Author's Affiliation | Faculty of Engineering, Tottori University |
| 4th Author's Name | Yutaka Fukui |
| 4th Author's Affiliation | Faculty of Engineering, Tottori University |
| Date | 2000/10/17 |
| Paper # | DSP2000-126, ICD2000-119, IE2000-71 |
| Volume (vol) | vol.100 |
| Number (no) | 389 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |