Multichannel spatial decompositions and upmixes have been proposed, but these are usually based on an unrealistically simple direct/ambient sound model, not capturing the full diversity offered by N discrete audio channels, where in an extreme case each channel can contain an independent sound source. While it has been argued that a simple direct/ambient model is sufficient, in practice such is limiting the achievable audio quality. To circumvent the problem of capturing multichannel signals with a single model, the proposed “ring upmix" applies a cascade of 2-channel upmixes to surround signals to generate channels for setups with more loudspeakers featuring full support for 360-degree panning with high channel separation.

Authors: Faller, Christof; Altmann, Lutz; Levison, Jeff; Schmidt, Markus
Affiliations: Illusonic GmbH, Uster, Switzerland; IOSONO GmbH, Erfurt, Germany(See document for exact affiliation information.)
AES Convention: 134 (May 2013) Paper Number: 8908
Publication Date: May 4, 2013
Subject: Spatial Audio

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