Method and apparatus for processing video signal

A method of decoding an image with a decoding apparatus, comprising:

• dividing, with the decoding apparatus, a picture into a plurality of coding tree blocks;
• dividing, with the decoding apparatus, a coding tree block based on a tree-based division to determine a current block, the tree-based division including at least one of a quad division, a binary division, or a triple division;
• determining, with the decoding apparatus, reference samples for intra prediction of the current block;
• generating, with the decoding apparatus, a prediction block of the current block based on the reference samples;
• obtaining, with the decoding apparatus, a residual block of the current block;
• and
• reconstructing the current block based on the prediction block and the residual block,
• wherein dividing the coding tree block comprises:
• dividing, based on the quad division, the coding tree block into four first coding blocks;
• and
• dividing, based on the triple division, one of the four first coding blocks into three second coding blocks,
• wherein the four first coding blocks have a same size, and
• 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.

A method of encoding an image with an encoding apparatus, comprising:

• dividing, with the encoding apparatus, a picture into a plurality of coding tree blocks;
• dividing, with the encoding apparatus, a coding tree block based on a tree-based division to determine a current block, the tree-based division including at least one of a quad division, a binary division, or a triple division;
• determining, with the encoding apparatus, reference samples for intra prediction of the current block;
• generating, with the encoding apparatus, a residual block of the current block based on a prediction block of the current block, the prediction block being generated based on the reference samples;
• and
• encoding, with the encoding apparatus, the residual block of the current block,
• wherein dividing the coding tree block comprises:
• dividing, based on the quad division, the coding tree block into four first coding blocks;
• and
• dividing, based on the triple division, one of the four first coding blocks into three second coding blocks,
• wherein the four first coding blocks have a same size, and
• 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.

A non-transitory computer-readable medium for storing compressed data associated with an image signal,

• the compressed data being generated by an image encoding method,
• the image encoding method comprising:
• dividing a picture into a plurality of coding tree blocks;
• dividing a coding tree block based on a tree-based division to determine a current block, the tree-based division including at least one of a quad division, a binary division, or a triple division;
• determining reference samples for intra prediction of the current block;
• generating a residual block of the current block based on a prediction block of the current block, the prediction block being generated based on the reference samples;
• and
• encoding the residual block of the current block,
• wherein dividing the coding tree block comprises:
• dividing, based on the quad division, the coding tree block into four first coding blocks;
• and
• dividing, based on the triple division, one of the four first coding blocks into three second coding blocks,
• wherein the four first coding blocks have a same size, and
• 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.