Patent ID: 9749643
Date: 2017-08-29
CPC Classifications: H04N

Claim:
1. A method performed by a decoding apparatus for reconstructing image information divided by a tree structure from a bitstream, the method comprising: decoding the bitstream to reconstruct additional information, the additional information including first information on a minimum block size and second information on a difference between the minimum block size and a maximum block size, wherein the difference between the minimum block size and the maximum block size is a value of a log scale; identifying the maximum block size using the first information on the minimum block size and the second information on the difference; and reconstructing a partition flag indicating whether or not each block, starting from a block corresponding to an uppermost layer of the tree structure, is divided into blocks of a lower layer, the block corresponding to the uppermost layer having the maximum block size identified based on the first and second information, and reconstructing image information of a block which is not further divided, wherein the partition flag indicating whether a block having the minimum block size is divided is not included in the bitstream, and the block having the minimum block size is not further divided in the tree structure.