The discrete wavelet transform (DWT) is incorporated into the JPEG baseline system for
image coding. The discrete cosine transform (DCT) is replaced by an association of two-
channel filter banks connected hierarchically. The JPEG block-scanning and quantization
schemes are adopted while we use JPEG's entropy coder. The changes in scanning can be
incorporated into the transform block in such a way that the only part that needs to be
changed in a JPEG framework is to replace the DCT by the DWT. Objective results and …

The discrete wavelet transform is incorporated into the JPEG baseline coder for image
coding. The discrete cosine transform is replaced by an association of two-channel filter
banks connected hierarchically. The scanning and quantization schemes are devised and
the entropy coder used is exactly the same as used in JPEG. The result is a still image coder
that outperforms JPEG while retaining its simplicity and most of its existing building blocks.
Objective results and reconstructed images are presented.