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| Paper: | AE-P1.6 |
| Session: | Loudspeaker and Microphone Array Signal Processing |
| Time: | Wednesday, May 19, 13:00 - 15:00 |
| Presentation: |
Poster |
| Topic: |
Audio and Electroacoustics: Loudspeaker and Microphone Array Signal Processing |
| Title: |
SPACE CONSTRAINED BEAMFORMING WITH SOURCE PSD UPDATES |
| Authors: |
Hai Quang Dam; Western Australian Telecommunications Research Institute | | |
| | Siow Yong Low; Western Australian Telecommunications Research Institute | | |
| | Hai Huyen Dam; Western Australian Telecommunications Research Institute | | |
| | Sven Nordholm; Western Australian Telecommunications Research Institute | | |
| Abstract: |
This paper presents a new space constrained adaptive beamformer employing an updated source power spectral density (PSD). The space constraints are used to capture the target signal spatially and to provide robustness against steering error vectors. The PSD update on the other hand ensures that the spectral information of the desired source is reflected continuously on the space constraints. As such, target signal extraction can be achieved with minimum distortion. The beamformer operates in a subband structure to allow time-frequency operation for each channel, yielding a combination of weighted spatial and temporal filters. Evaluations on real car data show that the proposed algorithm significantly improves thespeech intelligibility with noise suppression level up to 21 dB. |
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