| Presentation | 2005/9/9 A New Self-Calibration Technique for Microphone Arrays Thanh Phong HUA, Akihiko SUGIYAMA, Gerard FAUCON, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A new self-calibration technique for microphone arrays is proposed. The signal in each channel is scaled with a gain that is obtained from a time-averaged power in each channel and their average across the channel. It is equivalent to calibrating a normalized channel signal to a channel averaged signal. The proposed calibration allows gain equalization without any change in the output power of the fixed beamformer. Suppressing the gain difference reduces directivity distortion and avoids target speech cancellation by the microphone array. Evaluation results in a simulated environment demonstrate that the gain difference as much as 3.1dB is successfully suppressed with an interference direction of arrival (DOA) of up to 90°. The improvement in the target speech leakage through a fixed blocking matrix is also depicted. Experimental results in the real environment with DOAs of 30° to 90° and signal-to-interference ratios of 0dB and 10dB show that the proposed method reduces the gain difference by 80% of the initial 1.26dB difference. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | microphone array / calibration |
| Paper # | SIP2005-80,SIS2005-29,SP2005-62 |
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| Conference Information | |
| Committee | SIS |
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| Conference Date | 2005/9/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Smart Info-Media Systems (SIS) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A New Self-Calibration Technique for Microphone Arrays |
| Sub Title (in English) | |
| Keyword(1) | microphone array |
| Keyword(2) | calibration |
| 1st Author's Name | Thanh Phong HUA |
| 1st Author's Affiliation | LTSI, Universite de Rennes I, Campus de Beaulieu:(Present address)Media and Information Research Laboratories, NEC Corporation() |
| 2nd Author's Name | Akihiko SUGIYAMA |
| 2nd Author's Affiliation | Media and Information Research Laboratories, NEC Corporation |
| 3rd Author's Name | Gerard FAUCON |
| 3rd Author's Affiliation | LTSI, Universite de Rennes I, Campus de Beaulieu |
| Date | 2005/9/9 |
| Paper # | SIP2005-80,SIS2005-29,SP2005-62 |
| Volume (vol) | vol.105 |
| Number (no) | 294 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |