| Presentation | 2007-12-11 DSP implementation of a noise suppressor using lattice filter Arata KAWAMURA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Communicating by the use of an emergency telephone in a tunnel in an expressway is not easy, because an ambient noise level is very high. So we have been studying about a noise suppressor which can cancel the high level tunnel noise existing in the expressway. Since the tunnel noise can be modeled as a random noise, we have previously proposed a noise suppressor using lattice filter which can cancel a white random noise included in an observed signal. But, the practical tunnel noise is not white. Hence the capability of the proposed system is comparatively low. In this paper, a new adaptive algorithm for suppressing the high level tunnel noise is proposed. The proposed algorithm can cancel a signal whose auto-correlation is weak such as the tunnel noise. Since the computational cost of the proposed algorithm is low, it can be easily implemented on a DSP (Digital Signal Processor). The real time, noise suppression experiments show that the proposed noise suppressor implemented on the DSP can dramatically reduce the tunnel noise. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | noise reduction / lattice filter / adaptive algorithm / DSP |
| Paper # | SIS2007-65 |
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| Conference Information | |
| Committee | SIS |
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| Conference Date | 2007/12/4(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Smart Info-Media Systems (SIS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | DSP implementation of a noise suppressor using lattice filter |
| Sub Title (in English) | |
| Keyword(1) | noise reduction |
| Keyword(2) | lattice filter |
| Keyword(3) | adaptive algorithm |
| Keyword(4) | DSP |
| 1st Author's Name | Arata KAWAMURA |
| 1st Author's Affiliation | Department of Systems Innovation, Graduate School of Engineering Science, Osaka University() |
| Date | 2007-12-11 |
| Paper # | SIS2007-65 |
| Volume (vol) | vol.107 |
| Number (no) | 374 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |