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Processors for generalized stack filters

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4 Author(s)
Akopian, D. ; Signal Process. Lab., Tampere Univ. of Technol., Finland ; Vainio, O. ; Agaian, S. ; Astola, J.

New processor structures for generalized stack filters are proposed. They can be implemented using different numbers of Boolean function units. The class of pipeline-parallel structures for generalized stack filters is simple and modular in structure, and suitable for VLSI implementation. Coder and decoder networks are developed for the mutual transform of binary-weighted and unary-weighted codes as the thresholding and addition units of the processors. The area time complexity A·T of the proposed filters is O(k3) due to the feedback, instead of O(2k) for the threshold decomposition structure, where k is the number of bits for sample representation

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Signal Processing, IEEE Transactions on  (Volume:43 ,  Issue: 6 )