Title :
Subband image coding using cosine modulated filter banks with perfect reconstruction and linear phase
Author :
Bolcskei, Helmut ; Stranz, Thomas ; Hlawatsch, Franz ; Sucher, Ralph
Author_Institution :
INTHFT, Wien Univ. of Technol., Austria
Abstract :
We propose a lossy image coding scheme based on the previously introduced even-stacked cosine modulated filter banks (CMFBs) that allow linear phase filters in all channels. We describe modifications of the JPEG quantization matrix and zig-zag sequence to match the structure of even-stacked CMFBs. We discuss the efficient design of even-stacked CMFBs. The rate-distortion performance and perceptual performance of the proposed transform coder are demonstrated using simulation results
Keywords :
band-pass filters; code standards; filtering theory; image coding; image reconstruction; image sequences; modulation; rate distortion theory; telecommunication standards; transform coding; two-dimensional digital filters; JPEG quantization matrix; cosine modulated filter banks; even-stacked cosine modulated filter banks; linear phase filters; lossy image coding; perceptual performance; perfect reconstruction; rate-distortion performance; simulation results; subband image coding; transform coder; zig-zag sequence; Channel bank filters; Discrete cosine transforms; Filter bank; Frequency; Image coding; Image reconstruction; Modulation coding; Nonlinear filters; Phase modulation; Prototypes; Quantization; Rate-distortion;
Conference_Titel :
Image Processing, 1997. Proceedings., International Conference on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-8186-8183-7
DOI :
10.1109/ICIP.1997.638841
