Shape of EQT subblock

An apparatus in a video system comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:

• apply, during a conversion between a current visual media block and a bitstream representation of the current visual media block, to the current visual media block, a partitioning process that splits the current visual media block into exactly four sub-blocks including at least one sub-block that has a size different from that of another sub-block, wherein a size of the current visual media block is M×N, wherein M and N are positive integers that are powers of 2, and wherein M is unequal to N;
• and
• perform the conversion based on the four sub-blocks and the partitioning process,
• wherein, in a case that the partitioning process is allowed for a depth/level, an indication of the usage of a corresponding partition structure is signaled.

A non-transitory computer readable media storing instructions that cause a processor to:

• apply, during a conversion between a current visual media block and a bitstream representation of the current visual media block, to the current visual media block, a partitioning process that splits the current visual media block into exactly four sub-blocks including at least one sub-block that has a size different from that of another sub-block, wherein a size of the current visual media block is M×N, wherein M and N are positive integers that are powers of 2, and wherein M is unequal to N;
• and
• perform the conversion based on the four sub-blocks and the partitioning process,
• wherein, in a case that the partitioning process is allowed for a depth/level, an indication of the usage of a corresponding partition structure is signaled.

A non-transitory computer readable media storing instructions that cause a processor to:

• apply, during a conversion between a current visual media block and a bitstream representation of the current visual media block, to the current visual media block, a partitioning process that splits the current visual media block into exactly four sub-blocks including at least one sub-block that has a size different from that of another sub-block, wherein a size of the current visual media block is M×N, wherein M and N are positive integers that are powers of 2, and wherein M is unequal to N;
• and
• generate the bitstream representation from the current visual media block based on the four sub-blocks and the partitioning process,
• wherein, in a case that the partitioning process is allowed for a depth/level, an indication of the usage of a corresponding partition structure is signaled.