Patent ID: 8509304

Claim:
A video encoding method comprising: encoding a first video component block of a predetermined size from a current video signal comprising at least two video components and recovering the encoded first video component block; predicting an encoding mode of a second video component block corresponding to the first video component block from the firstly encoded and recovered first video component block by using a correlation between the first video component block and the second video component block; and encoding the second video component block according to the predicted encoding mode, wherein the encoding mode of the second video component includes at least one of a block mode for representing a divided form of the second video component block and an intra-prediction mode of the second video component block, wherein the predicting comprises determining a block mode of the first video component block by determining a final divided form of the first video component block by dividing the first video component block into sub-blocks by using a complexity of the recovered first video component block, and repeatedly dividing the sub-blocks into sub-blocks of smaller size according to a complexity of the sub-blocks and dividing the second video component block according to the same block mode as the determined block mode of the first video component, and wherein in the determining of the block mode of the first video component block, in a case where a size of an edge component included in the first video component block is greater than a predetermined first threshold, the first video component block is divided into sub-blocks of smaller size, and a final divided form of the first video component block is determined by repeatedly dividing sub-blocks having an edge component greater than a second threshold into sub-blocks of smaller size.