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Preservation of subband symmetry in multirate signal coding

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1 Author(s)
Brislawn, C.M. ; Los Alamos Nat. Lab., NM, USA

The article derives necessary and sufficient conditions for a multirate linear phase FIR filter bank, acting on a symmetrically extended finite-length input signal, to produce either symmetric or antisymmetric downsampled subbands. Such techniques have gained popularity for image coding applications, and we provide the solution to a key technical problem in terms of the input and filter symmetries and the downsampling ratio

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Signal Processing, IEEE Transactions on  (Volume:43 ,  Issue: 12 )