A fast VLSI implementation of sorting algorithm for standard median filters

A new and fast sorting algorithm and architecture for standard median filters is proposed. This algorithm is suitable for VLSI implementation with low area that results in low switching activity and no feedback loop. The main idea is to employ a so-called history matrix for fast searching the rank of the oldest (first-in) window element. We simulated the proposed algorithm using SYNOPSYS/sup TM/ and the result showed the efficiency in real time operation.