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Blind one-to-n upmixing

 
: Uhle, C.; Walther, A.; Ivertowski, M.

Fraunhofer-Institut für Digitale Medientechnologie -IDMT-, Ilmenau:
Audio Mostly 2007. Conference proceedings : 2nd Conference on Interaction with Sound. September 27 - 28, 2007, Röntgenbau, Ilmenau, Germany
Ilmenau: Fraunhofer IDMT, 2007
ISBN: 978-3-00-022823-0
S.110-115
Audio Mostly - Conference on Interaction with Sound <2, 2007, Ilmenau>
Englisch
Konferenzbeitrag
Fraunhofer IIS ()

Abstract
Recently, a novel method for the extraction of an ambience signal using Non-negative Matrix Factorization for ambience-based blind upmixing of one-channel audio signals has been proposed. This paper investigates how to improve the overall subjective quality of the surround presentation by applying suitable post-processing techniques. The basic requirements for the upmixed multi-channel signal are formulated and appropriate audio signal processing methods are proposed. This includes signal adaptive equalization, transient suppression and signal decorrelation. Listening tests confirm the listeners' preference of the post-processed upmix compared to unprocessed audio and previous upmix algorithms when played back on a 5.0 system.

: http://publica.fraunhofer.de/dokumente/N-263195.html