Patent ID: 8243795

Claim:
An apparatus for removing a blocking phenomenon using properties of two blocks, comprising: a decoder configured to determine whether at least one of a first block and a second block has non-zero transform coefficient information, and the second block being adjacent to the first block, the decoder further configured to, determine a filter strength value in consideration of a presence of the non-zero transform coefficient information, determine coefficients, for pixels on a block boundary between the first and second blocks, based on the filter strength value, and calculate values of the pixels on the block boundary based on the determined coefficients, the calculating including performing a bit shift operation, the calculating step further including, calculating values of at least two successive pixels in the first block based on pixel values of the at least two successive pixels in the first block, and calculating values of at least two successive pixels in the second block based on pixel values of the at least two successive pixels in the second block, wherein the bit shift operation uses an integer wherein the integer is greater than 1.