Patent ID: 9264716
Filing Date: 2016-02-16
CPC Classification: H04N

Claim Text:
1. A method of decoding a video in unit of blocks at a video decoding apparatus, the method comprising: extracting and decoding a first information indicating a minimum block size and a second information indicating an enlarging ratio relative to the minimum block size, from a bitstream encoded by a video encoding apparatus; setting a maximum block size to a size enlarged from the minimum block size by the enlarging ratio; setting a size of a square current block to be decoded as the maximum block size and decoding, from the bitstream, partition information of a square current block having the maximum block size by a tree structure to thereby identify one or more subblocks in the current block which have sizes equal to or larger than the minimum block size; decoding a prediction mode information of each of the subblocks from the bitstream, the prediction mode information indicating whether each of the subblocks is inter-predicted or intra-predicted; and reconstructing each of the subblocks in the current block by predicting each of the subblocks according to corresponding prediction mode information, wherein the decoding of the partition information comprises: reconstructing a partition flag indicating whether or not each node of the tree structure, starting from a node of an uppermost layer corresponding to the current block, is divided into four nodes of a lower layer; and identifying blocks corresponding to nodes which are not further divided as the subblocks in the current block.