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Wavelet Transforms in the JPEG-2000 Standard Michael D. Adams and Rabab Ward

Summary: Wavelet Transforms in the JPEG-2000 Standard
Michael D. Adams and Rabab Ward
Dept. of Elec. and Comp. Engineering, University of British Columbia, Vancouver, BC, Canada, V6T 1Z4
mdadams@ieee.org and rababw@ece.ubc.ca
Studied are numerous issues associated with wavelet transforms in
the JPEG-2000 Part-1 standard (i.e., ISO/IEC 15444-1). The dy-
namic range of wavelet transform coefficients and computational
complexity of wavelet transforms are examined. Also, the effect
of wavelet transforms on coding efficiency is investigated. The
information presented herein may prove beneficial to those devel-
oping JPEG-2000 codec implementations.
1. Introduction
JPEG-2000 Part 1 has recently been approved as a new interna-
tional standard for still image compression. This standard, for-
mally known as ISO/IEC 15444-1 [1], provides a rich feature
set including support for both lossy and lossless coding. One of
the core technologies employed by the JPEG-2000 codec is the
wavelet transform. Thus, in order to build a high-quality JPEG-
2000 encoder or decoder, one must be able to construct an effec-


Source: Adams, Michael D. - Department of Electrical and Computer Engineering, University of Victoria


Collections: Engineering