Subband coding of images with circular convolution

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A novel filtering technique for subband coding (SBC) of images is introduced. The method avoids data increase, reduces reconstructed image data distortion, and activates any type of linear phase finite impulse response (FIR) filter. The procedure involves (1) special methods that generate periodic data from original nonperiodic data; (2) identifying the relation between periodic data types and filter types; and (3) the selection of an appropriate method of rate conversion. Simulation results show the benefit of the proposed method. >

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