US Patent 11381848 Main concept of EQT, unequally four partitions and signaling

Methods, systems and devices for using flexible and efficient partitioning techniques are described. An exemplary method for visual media decoding includes applying, to a 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 half of a width of the current visual media block times half of a height of the current visual media block, decoding, based on a bitstream representation, the four sub-blocks, and decoding, based on the four sub-blocks and the partitioning process, the current visual media block.