Title :
On optimal tiling of the spectrum in subband image compression
Author :
Balasingham, Ilangko ; Fuldseth, Arild ; Ramstad, Tor A.
Author_Institution :
Dept. of Telcommun., Norwegian Univ. of Sci. & Technol., Norway
Abstract :
The performance of subband image coders depends on the proper choice of frequency partitioning in the subband domain. It is therefore desirable to have an adaptive nonuniform filter bank to cope with the frequency characteristics of the image at hand. However, a good choice, if a nonadaptive structure is to be used, is combinations of uniform parallel and octave-band tree-structured filter banks. Uniform parallel (8-channel, 32-tap), and 3-stage and 6-stage octave-band tree-structured systems are compared using a fixed rate coder for image coding. Favorable results are obtained using the combination of a parallel filter bank and a tree-structured system. The coding results are comparable to the “best” results reported in the literature
Keywords :
band-pass filters; circuit optimisation; filtering theory; image coding; image reconstruction; parallel processing; spectral analysis; vector quantisation; 3-stage system; 6-stage system; adaptive nonuniform filter bank; frequency characteristics; frequency partitioning; image coding; nonadaptive structure; octave-band tree-structured filter banks; octave-band tree-structured systems; optimal spectrum tiling; parallel filter bank; perfect reconstruction property; performance; pyramid vector quantization; subband domain; subband image coders; subband image compression; Channel bank filters; Compaction; Decorrelation; Filter bank; Filtering; Finite impulse response filter; Frequency; Image coding; Image restoration; Interpolation;
Conference_Titel :
Image Processing, 1997. Proceedings., International Conference on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-8186-8183-7
DOI :
10.1109/ICIP.1997.647381
