This research proposes a generalized and optimized framework for time–frequency processing of spatial audio using a signal covariance matrix. This framework is relevant for a wide variety of spatial applications, such as perceptual spatial coding, stereo upmixing, decorrelation, and so on. The matrix, which represents interchannel dependencies, is perceptually relevant for the transmission of the listener’s spatial experience. In a typical application, the original time–frequency covariance matrix is transformed into the target matrix, optimizing the sound quality using a least mean square metric. In an example of upmixing stereo music, informal listening tests confirmed the validity of the framework.

Authors: Vilkamo, Juha; Bäckström, Tom; Kuntz, Achim
Affiliations: Aalto University, Espoo, Finland; Fraunhofer IIS, Erlangen, Germany(See document for exact affiliation information.)
JAES Volume 61 Issue 6 pp. 403-411; June 2013
Publication Date: July 8, 2013 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=16831

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