IMAGE ENCODING APPARATUS, IMAGE DECODING APPARATUS, IMAGE ENCODING METHOD AND IMAGE DECODING METHOD Russian patent published in 2014 - IPC H04N19/82 H04N19/46 

FIELD: radio engineering, communication.

SUBSTANCE: loop filter 6 includes a region classification unit 12 for extracting an estimate value of each of the regions making up a local decoded image in order to classify each of the regions into a class to which the region belongs according to the estimate value. The loop filter 6 also includes a unit 13 for making up and processing a filter for each class to which one or more regions belongs, generating a Wiener filter, which minimises errors arising between the input image and the local decoded image in each of the regions to compensate for distortion on each region using the Wiener filter.

EFFECT: high image quality.

2 cl, 18 dwg