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Sparsity level in a non-negative matrix factorization based speech strategy in cochlear implants
ISVR, University of Southampton.
KTH, School of Electrical Engineering (EES), Sound and Image Processing.
KTH, School of Electrical Engineering (EES), Sound and Image Processing.
KTH, School of Electrical Engineering (EES), Sound and Image Processing.
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2012 (English)In: 2012 Proceedings Of The 20th European Signal Processing Conference (EUSIPCO), IEEE Computer Society, 2012, 2432-2436 p.Conference paper, Published paper (Refereed)
Abstract [en]

Non-negative matrix factorization (NMF) has increasinglybeen used as a tool in signal processing in the last years, butit has not been used in the cochlear implants (CIs). Toimprove the performance of CIs in noisy environments, anovel sparse strategy is proposed by applying NMF onenvelops of 22 channels. In the new algorithm, the noisyspeech is first transferred to the time-frequency domain viaa 22- channel filter bank and the envelope in each frequencychannel is extracted; secondly, NMF is applied to theenvelope matrix (envelopegram); finally, the sparsitycondition is applied to the coefficient matrix to get moresparse representation. Speech reception threshold (SRT)subjective experiment was performed in combination withfive objective measurements in order to choose the properparameters for the sparse NMF model.

Place, publisher, year, edition, pages
IEEE Computer Society, 2012. 2432-2436 p.
Series
European Signal Proceedings Conference, ISSN 2076-1465
Keyword [en]
Non-negative matrix factorization, cochlear implants, sparse coding, objective measurements, speech perception threshold
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-105197ISI: 000310623800489Scopus ID: 2-s2.0-84869745006ISBN: 978-1-4673-1068-0 (print)OAI: oai:DiVA.org:kth-105197DiVA: diva2:570296
Conference
European Signal Process. Conf. (EUSIPCO), 27-31 Aug. 2012, Bucharest, Romania
Funder
ICT - The Next Generation
Note

QC 20121120

Available from: 2012-11-20 Created: 2012-11-19 Last updated: 2013-04-15Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • text
  • asciidoc
  • rtf