DEBLOCK FILTER AND DEBLOCK FILTERING METHOD IN H.264/AVC

摘要

A deblock filter and a deblock filtering method in H.264/AVC are provided to perform low power consumption and high performance filtering calculation by performing a horizontal-vertical interleave deblock filtering which satisfies H.264/AVC video coding standards and minimizing data transaction between an external memory and an inner SRAM. A deblock filter for removing a blocking effect, includes: an input controller which inputs video data to filter from an external memory in the order of luminance component data, blue chrominance component data, and red chrominance component data, and inputs data of sub-block units in sequence from a left column to a right column for a single macro block and from an upper line to a lower line in each column; a filtering magnitude/threshold value generator which calculates a filtering magnitude and a threshold value required for the filtering; an edge filtering calculator which is input with pixel data existing on opposite sides of an edge to filter for a sub-block input by the input controller and performs the filtering; an inner memory 1 and an inner memory 2 which store pixel data of a sub block neighboring left and upper sides of the present sub block to filter; a transpose register 1 and a transpose register 2 which buffer and transpose the video data; and an output controller which stores the data filtered by the edge filtering calculator in the unit of sub block in sequence to an external memory.