Subband image coding using cosine modulated filter banks with perfect reconstruction and linear phase
AuthorsHelmut Bölcskei, Thomas Stranz, Franz Hlawatsch, and Ralph Sucher
ReferenceProc. of IEEE International Conference on Image Processing (ICIP), Santa Barbara (CA), Vol. 2, pp. 594-597, Oct. 1997.
AbstractWe propose a lossy image coding scheme based on the recently 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, and 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.
KeywordsImage coding, cosine modulated filter banks, JPEG, linear phase filters
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