Method of reducing a blocking artifact when coding moving...

Details Method of reducing a blocking artifact when coding moving... Method of reducing a blocking artifact when coding moving...

2007-06-19

2007-06-19

Rogers, Scott A. (Department: 2625)

Image analysis

Image enhancement or restoration

Edge or contour enhancement

C375S240270

Reexamination Certificate

active

11619926

ABSTRACT:
A method of coding a moving picture is provided that reduces blocking artifacts. The method can include defining a plurality of defining pixels S0, S1, and S2, 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.

REFERENCES:
patent: 5590064 (1996-12-01), Astle
patent: 5629778 (1997-05-01), Reuman
patent: 5677736 (1997-10-01), Suzuki et al.
patent: 5903679 (1999-05-01), Park

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