Image processing device and method

IMAGE PROCESSING APPARATUS AND METHOD The present disclosure relates to an image processing apparatus and an image processing method that are intended to suppress a decrease in parallelism of coding and decoding. An image is divided into a plurality of Coding Tree Units (CTUs), the divided image comprising a plurality of CTU lines in parallel. Each CTU of the plurality of CTUs is divided into a plurality of blocks, wherein each block of the plurality of blocks is a processing unit having a size smaller than that of the CTU. The disclosed technique determines whether entropy-coding of each CTU line of the plurality of CTU lines is applied, wherein the entropy-coding is delayed by one CTU between adjacent CTU lines of the plurality of CTU lines. Upon determining that the entropy-coding is applied, the disclosed technique: performs intra prediction of an upper left block of a current CTU of a current CTU line of the plurality of CTU lines with reference to corresponding adjacent blocks of at least one adjacent upper CTU of an adjacent upper CTU line, and performs intra prediction of an upper right block of the current CTU with reference to corresponding adjacent blocks of an adjacent upper CTU of the adjacent upper CTU line and without reference to a lower left block of a non-adjacent upper right CTU of the adjacent upper CTU line.