Patent ID: 8811476

Claim:
A method of removing a blocking artifact using quantization information in a filtering system, comprising: obtaining quantization information related to at least one of a first block and a second block, the second block being adjacent to the first block; comparing the quantization information with a predefined constant value that remains fixed over more than one execution of a filtering process for a plurality of frames to determine whether the quantization information is greater than or less than or equal to the predefined constant value; obtaining block type information for the first and second block, the block type information indicating whether a block is an intra-coded block; and performing the filtering process based on a result from the comparing step when at least one of the first block and the second block is the intra-coded block according to the block type information, the filtering process including, obtaining a filtered value of at least one pixel in the first block based on values of at least two pixels in the first block, and obtaining a filtered value of at least one pixel in the second block based on values of at least two pixels in the second block.