Pipelined median filters

Several DSP algorithms need to remove high-frequency or impulsive noise while preserving edges, e.g., in speech and image processing applications: median filtering has been proved more effective to achieve this goal than other filtering techniques. Efficient architectural implementation for real-time applications involves a careful VLSI design, which takes into account modularity, regularity, adaptability, throughput, circuit complexity, and fault tolerance. Two new architectural approaches are presented in this paper to deal with different application and implementation constraints: the pipelined polarizing median filter and the pipelined sorting median filter