In order to reduce the increase data rate of multichannel surround sound, a hierarchical bandwidth limiting technique is proposed. In this approach, the original signals are transformed into a hierarchical representation, which is then band-limited and re-transformed back into the original representation. Subjective listening tests were used to evaluate two such approaches: Gerzon MSBTF and Karhumen–Lòeve transforms. The results showed that the signal-dependent hierarchical encoding performed better than the signal-independent techniques, but both techniques were better than conventional methods.

Authors: Jiao, Yu; Zieli´nski, Slawomir; Rumsey, Francis
Affiliation: Institute of Sound Recording, University of Surrey
JAES Volume 56 Issue 12 pp. 1057-1068; December 2008
Publication Date: January 9, 2009

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