A system, apparatus, and method for filtering a decoded video stream having a plurality of frames, each frame having a plurality of blocks. The method can include selecting a current block from a current frame of the plurality of frames and an adjacent block from the current frame of the plurality of frames, the current block being adjacent to and sharing an edge with the adjacent block and filtering the edge between the current block and the adjacent block using a processor if an output from an edge-detection function of the values of at least four pixels located about the edge and within a line of pixels extending through both the current block and the adjacent block is less than an edge threshold.