| Presentation | 2002/6/21 Consideration of Noise Subtraction Coefficient in Noise Reduction System Based on Modified DFT Pair Isao NAKANISHI, Yoshimitsu TORIGOE, Yoshio ITOH, Yutaka FUKUI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have proposed a noise reduction system based on the modified DFT pair, where the input and the noise spectra were detected in real-time. The noise reduction was achieved by subtracting the detected noise spectrum from the input one. The noise subtraction coefficient was also introduced for adjusting amount of the noise spectrum to obtain the optimal output SNR and was determined by trial and error. However, such the optimal value did not bring the best performance in the subjective evaluation. In this paper, we propose a new objective evaluation method which agrees with the subjective result. Moreover, we propose to adjust the coefficient adaptively in real-time according to the existence of voice in the input signal. The effectiveness of the variable coefficient is examined through computer simulations using speech signals. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Noise Reduction / Frequency Domain / DFT / Noise Subtraction Coefficient / Objective Evaluation |
| Paper # | DSP2002-66 |
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| Conference Information | |
| Committee | DSP |
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| Conference Date | 2002/6/21(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 | Digital Signal Processing (DSP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Consideration of Noise Subtraction Coefficient in Noise Reduction System Based on Modified DFT Pair |
| Sub Title (in English) | |
| Keyword(1) | Noise Reduction |
| Keyword(2) | Frequency Domain |
| Keyword(3) | DFT |
| Keyword(4) | Noise Subtraction Coefficient |
| Keyword(5) | Objective Evaluation |
| 1st Author's Name | Isao NAKANISHI |
| 1st Author's Affiliation | Faculty of Education and Regional Sciences, Tottori University() |
| 2nd Author's Name | Yoshimitsu TORIGOE |
| 2nd Author's Affiliation | Faculty of Engineering, Tottori University |
| 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 | 2002/6/21 |
| Paper # | DSP2002-66 |
| Volume (vol) | vol.102 |
| Number (no) | 168 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |