Partitioning with high level constraint

An apparatus for image partitioning, comprising:

• a processor;
• and
• a memory coupled to the processor and configured to store instructions that, when executed by the processor, cause the apparatus to be configured to:
• determine a first indicator, wherein the first indicator is shared by a first part of a bitstream, and wherein the first indicator indicates whether binary tree (BT) or ternary tree (TT) splitting is enabled;
• determine a partitioning of an image area corresponding to the first part of the bitstream with BT splitting or TT splitting, when the first indicator takes a first value;
• and
• determine the partitioning of the image area corresponding to the first part of the bitstream without BT splitting and TT splitting, when the first indicator takes a second value, wherein the first value is different from the second value, and wherein when the first indicator takes the second value, the partitioning of the image area without BT splitting and TT splitting comprises:
• setting a minimum luma size of a coding block from quadtree splitting as 4 or setting a minimum luma coding block size;
• setting a maximum hierarchy depth for multiple type tree splitting as 0;
• and
• setting a maximum luma size of a coding block from BT splitting as 0 or setting the minimum luma coding block size.

A computer program product comprising computer-executable instructions stored on a non-transitory computer-readable medium that, when executed by a processor, cause an apparatus to:

• determine a first indicator, wherein the first indicator is shared by a first part of a bitstream, and wherein the first indicator indicates whether binary tree (BT) or ternary tree (TT) splitting is enabled;
• determine a partitioning of an image area corresponding to the first part of the bitstream with BT splitting or TT splitting, when the first indicator takes a first value;
• and
• determine the partitioning of the image area corresponding to the first part of the bitstream without BT splitting and TT splitting when the first indicator takes a second value, wherein the first value is different from the second value, and wherein when the first indicator takes the second value, the partitioning of the image area without BT splitting and TT splitting comprises:
• setting a minimum luma size of a coding block from quadtree splitting as 4 or setting a minimum luma coding block size;
• setting a maximum hierarchy depth for multiple type tree splitting as 0;
• and
• setting a maximum luma size of a coding block from BT splitting as 0 or setting the minimum luma coding block size.