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Recursive time-varying filter banks for subband image coding

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2 Author(s)
Smith, M.J.T. ; Digital Signal Process. Lab., Georgia Inst. of Technol., Atlanta, GA, USA ; Chung, W.C.-L.

Filter banks, subband/wavelets, and multiresolution decompositions that employ recursive filters have been considered previously and are recognized for their efficiency in partitioning the frequency spectrum. This paper presents an analysis of a new infinite impulse response (IIR) filter bank in which these computationally efficient filters may be changed adaptively in response to the input. The new filter bank framework is presented and discussed in the context of subband image coding. In the absence of quantization errors, exact reconstruction can be achieved. By the proper choice of an adaptation scheme, it is shown that recursive linear time-varying (LTV) filter banks can yield improvement over conventional ones

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Image Processing, IEEE Transactions on  (Volume:4 ,  Issue: 7 )