Systems and methods for blending block sections in a partition-based prediction mode

A method of generating a video bitstream, the method comprising:

• generating a video bitstream, wherein the video bitstream comprises a plurality of blocks, including a first block, generating the video bitstream including:
• in accordance with the first block being coded with a first partition mode, identifying a first section of the first block and a second section of the first block;
• identifying a plurality of blending values for blending the first section and the second section, the plurality of blending values obtained from one or more lookup tables,
• wherein the one or more lookup tables include values ranging from 0 to N, N being a positive integer,
• wherein at least a first value corresponding to a last position in the one or more lookup tables is set to 0 and corresponds to a portion of the first section that is outside of a first blending region, and
• wherein a second value in the one or more lookup tables is set to N and corresponds to a portion of the second section that is outside of a second blending region;
• and
• encoding the first block according to the plurality of blending values;
• and
• transmitting the video bitstream including the encoded first block.