For Spectral Oriented Trees (SOT) based coders such as SPIHT and CEIHT, locality is usually related to the locations of coefficients within a SOT and its effect to coding efficiency. How to construct a SOT to achieve better locality is very important. This paper presents a diagnostic aspect of the localities of different ordering techniques for low bit-rate audio coding. We used several coefficient ordering schemes to construct SOTs with the same set of MDCT coefficients and observed their effects. Both objective and subjective results are presented.

Authors: Su, Alvin W.Y.; Wang, Yu-Lin
Affiliation: SCREAM Lab. CSIE. NCKU
AES Convention: 124 (May 2008) Paper Number: 7482
Publication Date: May 1, 2008
Subject: Low Bit-Rate Audio Coding

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