SUBBAND PREDICTION USING LEAKAGE INFORMATION IN IMAGE-CODING

This paper examines the potential uses of interband leakage in image c oders based on subband decomposition. The approach taken is to use the lowpass subband to predict the signal behavior in the other bands. Th is information is then used to both inform the coder/decoder as to lik ely locations for significant energy in the highpass bands, and to for m a difference signal that can be coded at a lower rate. These methods give significant gains for some image/filter combinations, but in gen eral it seems that analysis filters producing low correlation should b e used if possible.