Kristofer Kjörling

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MPEG Spectral Band Replication (SBR) is the newest compression technology available as part of the MPEG standards. It is combined with MPEG Advanced Audio Coding (AAC) and improves coding efficiency by more than 30%. The resulting scheme is called High-Efficiency AAC (HE AAC). This presentation explains MPEG SBR and its integration into the existing MPEG-4(More)
Recently, technologies for parametric coding of multi-channel audio signals have received wide attention under the name of “Spatial Audio Coding.” In contrast to a fully discrete representation of multi-channel sound, these techniques allow for a backward compatible transmission at bitrates only slightly higher than rates commonly used for mono / stereo(More)
MPEG Unified Speech and Audio Coding—The ISO/MPEG Standard for High-Efficiency Audio Coding of All Content Types—Max Neuendorf,1 Markus Multrus,1 Nikolaus Rettelbach,1 Guillaume Fuchs,1 Julien Robilliard,1 Jérémie Lecomte,1 Stephan Wilde,1 Stefan Bayer,1 Sascha Disch,1 Christian Helmrich,1 Roch Lefebvre,2 Philippe Gournay,2 Bruno Bessette,2 Jimmy Lapierre,2(More)
1 Philips Research Laboratories, 5656 AA, Eindhoven, The Netherlands 2 Fraunhofer Institute for Integrated Circuits IIS, 91058 Erlangen, Germany {hrr;pts} 3 Coding Technologies, 11352 Stockholm, Sweden {lv;kk} 4 Vast Audio, NSW 1430 Sydney, Australia 5 Philips Applied(More)
This paper describes novel methods for evoking a multichannel audio experience over stereo headphones. In contrast to the conventional convolution-based approach where, for example, five input channels are filtered using ten head-related transfer functions, the current approach is based on a parametric representation of the multichannel signal, along with(More)
In 2003 and 2004, the ISO/IEC MPEG standardization committee added two amendments to their MPEG-4 audio coding standard. These amendments concern parametric coding techniques and encompass Spectral Band Replication (SBR), Sinusoidal Coding (SSC), and Parametric Stereo (PS). In this paper, we will give an overview of the basic ideas behind these techniques(More)
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