logo Idiap Research Institute        
 [BibTeX] [Marc21]
Structured Sparse Coding for Microphone Array Location Calibration
Type of publication: Conference paper
Citation: Asaei_SAPA-SCALE_2012
Publication status: Accepted
Booktitle: SAPA-SCALE Conference, The 5th ISCA workshop on statistical and perceptual audition
Year: 2012
Month: September
Abstract: We address the problem of microphone location calibration from a sparse coding perspective where the sensor positions are approximated over a discretized grid. We characterize the microphone signals as a sparse vector represented over a codebook of multi-channel signals where the support of the representation encodes the microphone locations. The codebook is constructed of multi-channel signals obtained by inverse filtering the acoustic channel and projecting the signals onto a array manifold matrix of the hypothesized geometries. This framework requires that the position of a speaker or the track of its movement to be known without any further assumption about the source signal. The sparse position encoding vector is approximated by model-based sparse recovery algorithm exploiting the block-dependency structure underlying the broadband speech spectrum. The experiments conducted on real data recordings demonstrate the effectiveness of the proposed approach and the importance of the joint sparsity models in multi-channel speech processing tasks.
Keywords: Microphone array calibration, Model-based sparse recovery, sparse coding, Speech spectral structures
Projects Idiap
FP 7
Authors Asaei, Afsaneh
Raj, Bhiksha
Bourlard, Hervé
Cevher, Volkan
Added by: [UNK]
Total mark: 0
  • Asaei_SAPA-SCALE_2012.pdf