Patent ID: 8040957
Filing Date: 2011-10-18
Classification: H04N

Abstract:
1. An encoder for encoding an image with selectively filtering a boundary between two adjacent blocks in a reconstructed image, comprising: motion compensation predictor for conducting motion compensation prediction for each of blocks to be encoded by using the reconstructed image, and transformer for transforming data of the block to be encoded, wherein filtering is not conducted for the boundary when (1) both the two adjacent blocks are predicted from a reference frame; (2) both the two adjacent blocks do not include any non-zero transform coefficients; and (3) motion vectors of the two adjacent blocks satisfy a specified condition, said specified condition including: wherein decision not to conduct the filtering is based on only a luminance component and, when filtering is not conducted for a boundary of blocks of a luminance component, filtering is not conducted also for a boundary of blocks of a chrominance component corresponding to the blocks of the luminance component.