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Descriptor-Based Spatialization

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Monophonic soundtrack translation to new audio format is a growing demand particularly from the DVD producers. The mono to 5.1 upmix is a time consuming task for the sound engineer who must choose and adapt different spatialization tools. In the view to simplify the upmix, we introduce a new spatialization approach based on descriptors. This approach consists in an automatic detection of audio source qualities, based on perceptive aspects. This paper presents an experimentation driven by Arkamys and Sony CSL Paris in order to evaluate the interest of descriptors, in regard of sound engineer needs when upmixing old movies. EDS (Zils & Pachet, 2004), a generic audio information extractor, was used to control the Arkamys spatializer (Raczinski, Monceaux, Vieilledent, 2003). We describe the aim and interest of this descriptor's approach and discuss its performances and limitations.

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