Method and device for image encoding/decoding on basis of asymmetric sub-block

A method of encoding a video, the method comprising:

• dividing a coding unit into a plurality of sub-units according to a block division structure;
• and
• performing encoding based on the sub-unit,
• wherein the block division structure is a block division structure in which division is performed so as to include at least one sub-unit having a predetermined block form other than square and rectangle forms.

A computer readable recording medium storing a bitstream generated by a video encoding method, wherein the method includes:

• dividing a coding unit into at least one sub-unit according to a block division structure;
• and
• performing encoding based on the sub-unit,
• wherein the block division structure is a block division structure in which division is performed so as to include at least one sub-unit having a predetermined block form other than square and rectangle forms.