| Presentation | 2003/5/8 A structure of a Nonlinear Acoustic Echo Cancellation Masayuki OTANI, Daisuke KATO, Yoshinobu KAJIKAWA, Yasuo NOMURA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we propose an ideal structure of nonlinear acoustic echo cancellation. Generally, it is assumed that acoustic echo path in hands free telecomunication systems is a linear system. However, the acoustic echo path in modern ultracompact GSM handset receivers is a nonlinear system because the influence of nonlinear distortions of low cost audio equipment is very large. In order to solve this problem, we therefore propose a structure that the linear characteristic of a loudspeaker is set in front of an adaptive disital filter and nonlinear inverse system is incorporated. The proposed structure can work on low computational complexity, realize fast convergence, and apply usual double talk detectors. From these advantages, the proposed structure could be applied in real environment, and is consequently very useful. Moreover, the proposed structure can improve the echo returen loss enhancement from 5dB to 10dB compared with conventional acoustic echo cancellers. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Hands-Free Telecommunication System / Acoustic Echo Cancellation / Nonlinear Inverse System |
| Paper # | EA2003-28 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2003/5/8(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 | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A structure of a Nonlinear Acoustic Echo Cancellation |
| Sub Title (in English) | |
| Keyword(1) | Hands-Free Telecommunication System |
| Keyword(2) | Acoustic Echo Cancellation |
| Keyword(3) | Nonlinear Inverse System |
| 1st Author's Name | Masayuki OTANI |
| 1st Author's Affiliation | Faculty of Engineering, Kansai University() |
| 2nd Author's Name | Daisuke KATO |
| 2nd Author's Affiliation | Faculty of Engineering, Kansai University |
| 3rd Author's Name | Yoshinobu KAJIKAWA |
| 3rd Author's Affiliation | Faculty of Engineering, Kansai University |
| 4th Author's Name | Yasuo NOMURA |
| 4th Author's Affiliation | Faculty of Engineering, Kansai University |
| Date | 2003/5/8 |
| Paper # | EA2003-28 |
| Volume (vol) | vol.103 |
| Number (no) | 52 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |