| Presentation | 2003/9/22 Spectral Subtraction of Nonstationary Audio Signals for Noise Reduction Masatsugu OKAZAKI, Toshifumi KUNIMOTO, Takao KOBAYASHI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper discusses a technique for reducing additive noise from audio signals which have nonstationary properties. Although spectral subtraction (SS) techniques are very effective for noise reduction of stationary signals, it does not work well when original signal has nonstationary properties such as pulsive wave sources and attack parts of piano sounds. We show that it is useful to choose an appropriate analysis window length in SS for such signals, and propose a multi-stage SS technique into which an window length adaptation mechanism is incorporated. We also propose a technique for suppressing pre-echo in SS with a long analysis window. A4-stage SS is implemented and a subjective evaluation for 4 audio signals was performed. It was found that the multi-stage SS can produce higher quality audio signals than single-stage SS. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | spectral subtraction / multi-stage spectral subtraction / spectral analysis / window length |
| Paper # | DSP2003-96,SP2003-91 |
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| Conference Information | |
| Committee | DSP |
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| Conference Date | 2003/9/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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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) | Spectral Subtraction of Nonstationary Audio Signals for Noise Reduction |
| Sub Title (in English) | |
| Keyword(1) | spectral subtraction |
| Keyword(2) | multi-stage spectral subtraction |
| Keyword(3) | spectral analysis |
| Keyword(4) | window length |
| 1st Author's Name | Masatsugu OKAZAKI |
| 1st Author's Affiliation | Pro Audio Digital Musical Instruments Division, YAMAHA corporation() |
| 2nd Author's Name | Toshifumi KUNIMOTO |
| 2nd Author's Affiliation | Pro Audio Digital Musical Instruments Division, YAMAHA corporation |
| 3rd Author's Name | Takao KOBAYASHI |
| 3rd Author's Affiliation | Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology |
| Date | 2003/9/22 |
| Paper # | DSP2003-96,SP2003-91 |
| Volume (vol) | vol.103 |
| Number (no) | 329 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |