Method and apparatus for processing video signal

A method of decoding a video, the method comprising:

• generating an initial prediction block of a current block in the video by using a reference block corresponding to the current block;
• and
• obtaining a prediction block of the current block by multiplying a weight to the initial prediction block, and then adding an offset,
• wherein the weight and the offset are derived using a first template region adjacent to the current block and a second template region adjacent to the reference block, and
• wherein when a reference sample adjacent to the reference block is unavailable, the reference sample is replaced by a sample inside the reference block rather than a sample in the second template region.

A method of encoding a video, the method comprising:

• generating an initial prediction block of a current block in the video by using a reference block corresponding to the current block;
• and
• obtaining a prediction block of the current block by multiplying a weight to the initial prediction block, and then adding an offset,
• wherein the weight and the offset are derived using a first template region adjacent to the current block and a second template region adjacent to the reference block, and
• wherein when a reference sample adjacent to the reference block is unavailable, the reference sample is replaced by a sample inside the reference sample rather than a sample in the second template region.

A device for transmitting compressed video data, the device comprising:

• one or more hardware configured to:
• obtain the compressed video data;
• and
• transmit the compressed video data,
• wherein obtaining the compressed video data comprises:
• generating an initial prediction block of a current block in the video by using a reference block corresponding to the current block;
• and
• obtaining a prediction block of the current block by multiplying a weight to the initial prediction block, and then adding an offset,
• wherein the weight and the offset are derived using a first template region adjacent to the current block and a second template region adjacent to the reference block, and
• wherein when a reference sample adjacent to the reference block is unavailable, the reference sample is replaced by a sample inside the reference sample rather than a sample in the second template region.