Method for encoding/decoding image and device thereof

Abstract

Provided are a video decoding method including determining at least one first block for partitioning a current frame which is one of at least one frame included in a video, determining a first prediction mode indicating an intra-prediction method to be performed on a current first block which is one of the at least one first block based on first intra-prediction mode information obtained from a bitstream when intra-prediction is performed on the current first block, determining a plurality of second blocks included in the current first block, determining second prediction modes indicating intra-prediction methods to be performed on the plurality of second blocks based on at least one of the first prediction mode and second intra-prediction mode information obtained from the bitstream with respect to each of the plurality of second blocks, and decoding the video by performing intra-prediction based on the first prediction mode and the second prediction mode; and a video decoding apparatus capable of performing the video decoding method. Provided are also a video encoding method performed in a way opposite or similar to the video decoding method; and a video encoding apparatus capable of performing the video encoding method.