Block form-based prediction method and device

A video decoding method, comprising:

• determining whether to perform a splitting for a target block;
• generating a split block by split the target block in a case that it is determined to perform the splitting;
• and
• performing decoding for the split block;

A video encoding method, comprising:

• determining whether to perform a partition for a target block;
• generating a split block by splitting the target block in a case that it is determined to perform the partition;
• and
• performing encoding for the split block;

A non-transitory computer-readable medium storing a bitstream, the bitstream comprising:

• encoded information for a target block;
• wherein whether to perform a partition for a target block is determined,
• a split block is generated by splitting the target block in a case that it is determined to perform the partition, and
• decoding for the split block is performed;