Patent ID: 7773677

Claim:
An image block error concealing apparatus in a mobile communication system comprising: an error concealer configured to search at least one of a previous frame or a subsequent frame with respect to a pixel/block using a motion estimation method, and to correct an error of the pixel/block based on the search; and an error refiner configured to refine the error-corrected pixel/block using adaptive weight sum median filtering in a predetermined direction when there is a prescribed difference between the error-corrected pixel/block and adjacent pixels/blocks, wherein the error concealer searches for a same pixel/block in the previous frame as a pixel/block to be error-corrected of a current frame, and only if the pixel/block is not found by the search the error concealer searches for the same pixel/block in the subsequent frame as the error-corrected pixel/block, wherein the error refiner is configured to: calculate a difference between the error-corrected pixel/block and an average value of one or more adjacent pixel/blocks, compare the difference and the average value, if the difference is smaller than the average value, perform adaptive weight sum median filtering by multiplying different weights to the error-corrected pixel/block and one or more of the adjacent pixel/blocks, and if the difference is not smaller than the average value, perform average sum median filtering by multiplying a same weight to the error-corrected pixel/block and the one or more adjacent pixel/blocks.