Header syntax for qt/bt/tt size

An apparatus for video coding, the apparatus comprising:

• at least one memory configured to store computer program code;
• at least one processor configured to access the computer program code and operate as instructed by the computer program code, the computer program code including:
• obtaining code configured to cause the at least one processor to obtain a coding tree unit (CTU) from video data;
• partitioning code configured to cause the at least one processor to partition the CTU by a quadtree structure;
• further partitioning code configured to cause the at least one processor to partition leaf nodes of the partitioned CTU by at least one of a binary tree structure and a ternary tree structure;
• and
• signaling code configured to cause the at least one processor to signal a difference, in base 2 logarithm, between at least one value and a size of a sample resulting from at least one of partitioning the CTU by the quadtree structure and partitioning leaf nodes of the partitioned CTU by the at least one of the binary tree structure and the ternary tree structure.

A non-transitory computer readable medium storing a program configured to cause a computer to:

• obtain a coding tree unit (CTU) from video data;
• partition the CTU by a quadtree structure;
• partition leaf nodes of the partitioned CTU by at least one of a binary tree structure and a ternary tree structure;
• and
• signal a difference, in base 2 logarithm, between at least one value and a size of a sample resulting from at least one of partitioning the CTU by the quadtree structure and partitioning leaf nodes of the partitioned CTU by the at least one of the binary tree structure and the ternary tree structure.