Reduction of image information distoration by adaptively band-limiting the image information as a function of at least a quantizing value

A system for reducing visual distortion during decoding of image information, comprising:

• decoding apparatus including image expanding means for decoding received compressed image information, that has been compressed with a quantizing value, to obtain restored image information related to said image information, said decoding apparatus including motion compensating means for effecting motion compensation on the restored image information using motion vectors;
• and
• a distortion suppressing circuit, connected to said decoding apparatus, for receiving the restored image information therefrom and for generating first information comprising at least differential information between motion-compensated image information and the restored image information, said distortion suppressing circuit performing a comparison operation between said differential information and a threshold value set in accordance with said quantizing value such that, based on said comparison operation, said distortion suppressing circuit selectively either adaptively band-limits in time domain the restored image information prior to outputting the restored image information or passes the restored image information unmodified for selectively providing either the band-limited restored image information or the unmodified restored image information, respectively, as output image information related to said image information.