Method and apparatus for processing video signal

A method of decoding a video, the method comprising:

• obtaining motion information of a current block;
• obtaining prediction samples of the current block based on the motion information of the current block;
• determining whether an inverse-transform is skipped for the current block or not;
• when it is determined that the inverse-transform is not skipped for the current block, determining a transform type for the current block;
• performing the inverse-transform for the current block based on the determined transform type;
• and
• reconstructing the current block based on the prediction samples and residual samples of the current block,
• wherein whether to parse a transform skip flag from a bitstream is determined based on whether a coding block including the current block is partitioned into two partitions or not.

A method of encoding a video, the method comprising:

• obtaining motion information of a current block;
• obtaining prediction samples of the current block by based on the motion information of the current block;
• generating residual samples of the current block by subtracting the prediction samples from original samples;
• determining a transform type for the current block;
• and
• performing the transform for the current block based on the determined transform type,
• wherein a transform skip flag which specifying whether the transform is skipped or not is selectively encoded into a bitstream, and
• wherein whether to encode the transform skip flag into the bitstream is determined based on whether a coding block including the current block is partitioned into two partitions or not.

A device storing a compressed video data which being generated with program instructions, when the program instructions being executed, the device being configured to:

• obtain motion information of a current block;
• obtain prediction samples of the current block by based on the motion information of the current block;
• generate residual samples of the current block by subtracting the prediction samples from original samples;
• determine a transform type for the current block;
• and
• perform the transform for the current block based on the determined transform type,
• wherein a transform skip flag which specifying whether the transform is skipped or not is selectively encoded into a bitstream, and
• wherein whether to encode the transform skip flag into the bitstream is determined based on whether a coding block including the current block is partitioned into two partitions or not.