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oai:www.ideals.illinois.edu:2142/46649 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Jones, Douglas L. Klingler, Daniel 2014-01-16T17:57:30Z 2014-01-16T17:57:30Z 2013-12 2014-01-16T17:57:30Z 2013-12 In many speech applications, a single talker is captured in the presence of background noise using a multi-microphone array. Without knowledge of the array geometry, talker location, or the room response, many traditional beamforming techniques cannot be used effectively. An adaptive, maximum-kurtosis objective is used in the frequency domain to blindly enhance the speech signal. The algorithm provides SNR gains of 3.5 - 7.5 dB with just two microphones in low-SNR, real-world scenarios. An improvement is presented that allows for faster and more stable convergence of the algorithm in real-time implementations. Finally, an alternative formulation to the problem is given, framing it in a way that might inspire new discussion or alternative solutions. Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2013-12-09T15:12:45Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 LaTeX Files.zip: 2671984 bytes, checksum: 37ded65ff02d169186df93674d728daf (MD5) Klingler_Daniel.pdf: 657581 bytes, checksum: c3b855d2d877a7d5dd4caad4c508fd5f (MD5) Made available in DSpace on 2014-01-16T17:57:30Z (GMT). No. of bitstreams: 3 Daniel_Klingler.pdf: 657581 bytes, checksum: c3b855d2d877a7d5dd4caad4c508fd5f (MD5) LaTeX Files.zip: 2671984 bytes, checksum: 37ded65ff02d169186df93674d728daf (MD5) license.txt: 4061 bytes, checksum: 84878df8afbfc79199d85e08ef1d3e76 (MD5) http://hdl.handle.net/2142/46649 en Copyright 2013 Daniel Klingler Speech Enhancement Maximum Kurtosis Subband Implementation Convergence Improvement Beamforming Noise Reduction Kurtosis-based blind beamforming: an adaptive, subband implementation with a convergence improvement text Electrical and Computer Engineering 1933 Electrical and Computer Engineering 1200 University of Illinois at Urbana-Champaign Thesis M.S. MS:Electr & Computer Eng-UIUC 10KS1200MS