Method and apparatus for processing video signal

A method of decoding an image, comprising:

• dividing, based on a tree-based division, a coding block to determine a current block, the tree-based division including at least one of a quad division, a binary division, or a triple division;
• obtaining prediction samples of the current block based on intra prediction or inter prediction;
• and
• reconstructing the current block based on the prediction samples,
• wherein the triple division is a division type of dividing a first coding block into three second coding blocks,
• wherein one of the three second coding blocks has a size greater than a size of each of the other two of the three second coding blocks,
• wherein the largest second coding block is located between the other two of the three second coding blocks,
• wherein, with respect to the binary division for the at least one of the three second coding blocks, it is restricted so as not to be divided in a same division direction as a division direction of the triple division for the first coding block, and
• wherein the restriction is applied only to the largest second coding block among the three second coding blocks.

A method of encoding an image, comprising:

• dividing, based on a tree-based division, a coding block to determine a current block, the tree-based division including at least one of a quad division, a binary division, or a triple division;
• obtaining prediction samples of the current block based on intra prediction or inter prediction;
• and
• obtaining residual samples of the current block by subtracting the prediction samples from original samples,
• wherein the triple division is a division type of dividing a first coding block into three second coding blocks,
• wherein one of the three second coding blocks has a size greater than a size of each of the other two of the three second coding blocks,
• wherein the largest second coding block is located between the other two of the three second coding blocks,
• wherein, with respect to the binary division for the at least one of the three second coding blocks, it is restricted so as not to be divided in a same division direction as a division direction of the triple division for the first coding block, and
• wherein the restriction is applied only to the largest second coding block among the three second coding blocks.

A device for transmitting compressed video data, comprising:

• a processor to obtain the compressed video data;
• and
• a transmitter to transmit the compressed video data,
• wherein obtaining the compressed video data comprises:
• dividing, based on a tree-based division, a coding block to determine a current block, the tree-based division including at least one of a quad division, a binary division, or a triple division;
• obtaining prediction samples of the current block based on intra prediction or inter prediction;
• and
• obtaining residual samples of the current block by subtracting the prediction samples from original samples,
• wherein the triple division is a division type of dividing a first coding block into three second coding blocks,
• wherein one of the three second coding blocks has a size greater than a size of each of the other two of the three second coding blocks,
• wherein the largest second coding block is located between the other two of the three second coding blocks,
• wherein, with respect to the binary division for the at least one of the three second coding blocks, it is restricted so as not to be divided in a same division direction as a division direction of the triple division for the first coding block, and
• wherein the restriction is applied only to the largest second coding block among the three second coding blocks.