Patent ID: 6825886
Filing Date: 2004-11-30
Classification: H04N

Abstract:
A picture signal processing apparatus for encoding and decoding an input picture on a block basis, comprising:filtering means for filtering the input picture responsive to characteristics of the input picture; encoding means for block encoding a picture filtered by the filtering means; decoding means for decoding the picture encoded by said encoding means; and noise reducing means for reducing at least the block distortion of the picture decoded by said decoding means, said noise reducing means comprising: extracting means for extracting an edge component of an input picture; detecting means for detecting the motion of the input picture; first calculating means for calculating parameters required for block distortion discrimination from the input picture; discriminating means for discriminating the block distortion based on the results of edge detection, the results of motion detection and the results of the parameter calculations; second calculating means for calculating a correction value for reducing the block distortion; and correction means for correcting the input picture by said correction value corresponding to the results of decision of said block distortion on the input picture and outputting the corrected input picture by way of noise reduction.