Patent ID: 9565444
Date: 2017-02-07
CPC Classifications: H04N

Claim:
1. A video decoding apparatus using a tree structure, the apparatus comprising: a decoder configured to a predictor configured to predict the identified block by using a prediction mode indicated by the prediction type information; an inverse transformer configured to generate a residual block by inversely transforming the transformed residual block; and an adder configured to add the predicted block to the residual block, wherein, when a block of a first layer in the tree structure is divided into four blocks of a second layer which is a lower layer of the first layer, the decoder is configured to decode the partition flag for each of the four blocks of the second layer in a predetermined order, wherein, when a block among the four blocks of the second layer is further divided into four blocks of a third layer which is a lower layer of the second layer, the decoder is configured to decode the partition flag for each of the four blocks of the third layer in the predetermined order, before decoding the partition flag for a next block of the second layer in the predetermined order, and wherein the predetermined order is an order of an upper left block, an upper right block, a lower left block and a lower right block.