Patent ID: 8792551
Filing Date: 2014-07-29
Classification: H04N

Abstract:
1. A method of reducing a blocking phenomenon using quantization information in a filtering system, comprising: determining whether a second block adjacent to a first block corresponds to an intra-coded block; determining a filter strength value in consideration of the correspondence of the second block to the intra-coded block; obtaining quantization information related to at least one of the first and second blocks; 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; and obtaining filtered values of pixels on a block boundary based on the determined filter strength value and the comparing step, the obtaining the filtered values including, obtaining filtered values of at least two successive pixels in the first block based on values of the at least two successive pixels in the first block, obtaining filtered values of at least two successive pixels in the second block based on values of the at least two successive pixels in the second block.