Patent ID: 9083978
Filing Date: 2015-07-14
Classification: H04N

Abstract:
1. A filtering method for applying a deblocking filter to a current block of an image, the filtering method comprising: judging, by a processor, whether a strong filter or a weak filter is to be applied to a boundary between the current block and a neighboring block adjacent to the current block; calculating a linear combination of current samples in the current block and adjacent samples in the neighboring block, the current samples and the adjacent samples forming a line of samples; shifting the linear combination right by a predetermined number of bits; and clipping the shifted linear combination to generate a filtered sample of the filtered current block, wherein the clipping for the strong filter is controlled by a first clipping parameter and the clipping for the weak filter is always controlled by a second clipping parameter regardless of any other condition, the first clipping parameter and the second clipping parameter depending on a strength of the boundary but having a different value with each other.