FIELD: physics.
SUBSTANCE: invention relates to a device for intra prediction of video, comprising replacement of an adjacent pixel, unavailable in restricted intra prediction mode, where the use of an adjacent pixel and the replaced adjacent pixel as a reference pixel is restricted. Disclosed is a video decoding device, comprising: an availability determiner, which determines whether a predetermined number of adjacent pixels, adjacent to the current block, is unavailable for intra prediction of said current block; replacement means which, when a first adjacent pixel, located at the lowest left part of the current block, from the predetermined number of adjacent pixels is unavailable, searches a second adjacent pixel, which is available, by performing search in the predetermined number of adjacent pixels in a predetermined direction from the lowest adjacent pixel on the left to the uppermost adjacent pixel on the left for adjacent pixels on the left and from the uppermost adjacent pixel on the left to the uppermost adjacent pixel on the right for adjacent pixels above based on the first adjacent pixel, replaces the pixel value of the first adjacent pixel with a pixel value of said second adjacent pixel, substitutes the unavailable adjacent pixel, located on the left part of the current block, successively with a pixel value a lower adjacent pixel, located immediately below the unavailable adjacent pixel, located on the left part of the current block, and substitutes the unavailable pixel, located in the upper part of the current block, successively with a pixel value of the adjacent pixel on the left, located immediately on the left side of the unavailable adjacent pixel, located in the upper part of the current block; and means of performing intra prediction, which performs intra prediction with respect to the current block using a predetermined number of adjacent pixels.
EFFECT: invention simplifies the process of determining a reference pixel for intra prediction of video.
5 tbl, 32 dwg
