Reconfigurable Acceleration of Microphone Array Algorithms for Speech Enhancement
Blekinge Institute of Technology, School of Engineering, Department of Signal Processing2008 (English)Conference paper (Refereed) Published
Microphone arrays play an important role in noise reduction and speech enhancement. Their algorithms are based on beamforming, which reduces the level of localized and ambient noise signals while minimizing distortion to speech from the desired direction via spatial filtering. This paper describes a class of subband beamforming algorithms. The similarity between different algorithms is discussed. To enhance computational efficiency, the algorithms are implemented in frequency domain. A hardware architecture, with bitwidth optimization, is proposed to support the algorithms. An implementation with 7 instances on a Xilinx XC4VSX55 FPGA at 175MHz can run 41.7 times faster than the corresponding pure software implementation on a 3.2GHz Pentium 4 PC. ©2008 IEEE.
Place, publisher, year, edition, pages
Leuven, Belgium: IEEE , 2008.
Filtering theory, microphone arrays, spatial filters, speech enhancement
IdentifiersURN: urn:nbn:se:bth-8352Local ID: oai:bth.se:forskinfoC3A8A136C35243CAC12575040038770FISBN: 978-1-4244-1897-8OAI: oai:DiVA.org:bth-8352DiVA: diva2:836062
International Conference on Application-Specific Systems, Architectures and Processors, Proceedings