H.264 decoder filter effect to block operation of a video image filtering areas, characterized lies in the fact that DDR S DRAM as the S-chip memory chip SRAM in the absence of conditions, one based on ASIC decoder registers in the three groups, respectively, from the vertical borders left, right and 4 X 4 on the side of the border the question filtering data, followed by a vertical and horizontal boundaries filtering operation, the data to Return to the left side and right side of the data transfer methods to achieve vertical filtering operation of the operation of the border between the transition; to judge 4 X 4 video data flanking the image of the entire frame flanking to decide data extraction; on the side of the border in order to judge whether the image of the entire frame on the side of the border to decide whether it is necessary to read the data on the side of the border; and it provides a realization of the hardware decoders. It has a fully reusable data and hardware overhead of small advantages.