Title :
Processors for generalized stack filters
Author :
Akopian, D. ; Vainio, O. ; Agaian, S. ; Astola, J.
Author_Institution :
Signal Process. Lab., Tampere Univ. of Technol., Finland
fDate :
6/1/1995 12:00:00 AM
Abstract :
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
Keywords :
Boolean functions; VLSI; codes; decoding; digital filters; filtering theory; nonlinear filters; parallel architectures; pipeline processing; Boolean function units; VLSI implementation; addition units; area time complexity; binary-weighted codes; coder networks; decoder networks; feedback; generalized stack filters; modular structure; mutual transform; pipeline-parallel structures; processor structures; sample representation; threshold decomposition structure; thresholding units; unary-weighted codes; Bismuth; Boolean functions; Decoding; Digital filters; Feedback; Image processing; Nonlinear filters; Signal processing; Statistics; Very large scale integration;
Journal_Title :
Signal Processing, IEEE Transactions on
