Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/36348
Title: On the indoor beamformer design with reverberation
Authors: Li, ZB
Yiu, KFC 
Nordholm, S
Keywords: Beamformer design
Dereverberation
Reverberation
Signal enhancement
Issue Date: 2014
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE/ACM transactions on audio, speech, and language processing, 2014, v. 22, no. 8, p. 1225-1235 How to cite?
Journal: IEEE/ACM transactions on audio, speech, and language processing 
Abstract: Beamforming remains to be an important technique for signal enhancement. For applications in open space, the transfer function describing waves propagation has an explicit expression, which can be employed for beamformer design. However, the function becomes very complex in an indoor environment due to the effects of reverberation. In this paper, this problem is discussed. A method based on the image source method (ISM) is applied to model the room impulse responses (RIRs), which will act as the transfer function between source and sensor. The indoor beamformer design problem is formulated as a minimax optimization problem. We propose and study several optimization models based on the L-1-norm to design the beamformer. We found that it is advantageous to separate early and late reverberations in the design process and better designs can be achieved. Several numerical experiments are presented using both simulated data and real recordings to evaluate the proposed methods.
URI: http://hdl.handle.net/10397/36348
ISSN: 2329-9290
DOI: 10.1109/TASLP.2014.2327299
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