Hardware friendly multi reference line selection design

A method of video encoding performed at a computing system having memory and one or more processors, the method comprising:

• receiving video data comprising a plurality of blocks, including a current superblock having a current block;
• determining a number of reference lines available to the current block based on a location of the current block within the current superblock, wherein:
• when the current block is located at a boundary of the current superblock, a first number of reference lines are available for the current block;
• and
• when the current block is not located at the boundary of the current superblock, a second number of references are available for the current block, the second number being higher than the first number;
• and
• encoding the current block using data from at least one of the number of reference lines available to the current block.

A non-transitory computer-readable storage medium storing a video bitstream that is generated by a video encoding method, the video bitstream comprising:

• coded information for a plurality of blocks of video data, including a current block;
• and
• wherein the video encoding method comprises:
• determining a number of reference lines available to the current block based on a location of the current block within the current superblock, wherein:
• when the current block is located at a boundary of the current superblock, a first number of reference lines are available for the current block;
• and
• when the current block is not located at the boundary of the current superblock, a second number of references are available for the current block, the second number being higher than the first number;
• and
• encoding the current block using data from at least one of the number of reference lines available to the current block.