Method of reducing a blocking artifact when coding moving picture
View Patent ↗A method of coding a moving picture is provided that reduces blocking artifacts. The method can include defining a plurality of defining pixels S 0 , S 1 , and S 2 , which are centered around a block boundary. If a default mode is selected then frequency information of the surroundings of the block boundary is obtained. A magnitude of a discontinuous component in a frequency domain belonging to the block boundary is adjusted based on a magnitude of a corresponding discontinuous component selected from a pixel contained entirely within a block adjacent the block boundary. The frequency domain adjustment is then applied to a spatial domain. Or, a DC offset mode can be selected to reduce blocking artifacts in smooth regions where there is little motion.
1. A computer-implemented method, comprising:
selecting a correction mode from at least first and second correction modes based on information obtained from first through eighth successive pixels, the first through fourth successive pixels being included in a first block, and the fifth through eighth successive pixels being included in a second block that is adjacent to the first block;
adjusting, if the first correction mode is selected, a pixel value for each of at most the fourth and fifth successive pixels; and
adjusting, if the second correction mode is selected, a pixel value for each of at least the second through seventh pixels.
2. A device comprising:
a deblocking filter configured to:
select a correction mode from at least first and second correction modes based on information obtained from first through eighth successive pixels, the first through fourth successive pixels being included in a first block, and the fifth through eighth successive pixels being included in a second block that is adjacent to the first block;
adjust, if the first correction mode is selected, a pixel value for each of at most the fourth and fifth successive pixels; and
adjust, if the second correction mode is selected, a pixel value for each of at least the second through seventh pixels.