Intra-prediction method, and encoder and decoder using same

摘要

The present invention relates to an intra-prediction method and to an encoder and decoder 5 using same. The intra-prediction method according to one embodiment of the present invention comprises the steps of: deriving a prediction mode of a current block; and generating a prediction block with respect to the current block on the basis of the prediction mode of the current block. When the prediction mode of the current block is an intra-angular prediction mode, values of boundary samples from among left boundary samples and upper boundary samples of the prediction block, which are not 0 positioned in a prediction direction of the intra-angular prediction mode, are derived on the basis of reference samples positioned in the prediction direction of the intra-angular prediction mode, and on the basis of adjacent reference samples. f/'14 x=-1..2*nS-1 . . . y=0..nS-1 y=-1..2*nS-1 620" x=..nS-1