1. An error concealment method comprising: determining a reference direction of a lost frame by determining whether a scene change between frames has occurred based on the lost frame; extracting concealment reference points for a pixel of the lost frame by using at least one frame other than the lost frame according to the determined reference direction; determining motion vectors for pixels of the lost frame which correspond to spatial displacements between the pixels of the lost frame and the extracted concealment reference points; obtaining a concealment pixel value of the pixel of the lost frame by giving weight values to the extracted concealment reference points, wherein larger weight values are given as absolute values of motion vectors, become smaller, and smaller weight values are given as the absolute values of the motion vectors, become larger; and restoring the lost frame by concealing the pixel using the concealment pixel value.