Transform unit partition method for video coding

A video coding device comprising:

• one or more processors configured to:
• partition a transform tree node (TTN) using a vertical binary tree split when a first TTN dimension is greater than a maximum transform unit (TU) size for the TTN and when the first TTN dimension is greater than a second TTN dimension, wherein the vertical binary tree split is implemented according to the following syntax:
• verSplitFirst=(tbWidth>MaxTbSizeY && tbWidth>tbHeight)?1:0;
• apply TUs to residuals to generate transform coefficients after the TTN has been partitioned;
• and
• encode the transform coefficients into a bitstream;
• and
• a memory coupled to the processors and configured to store the bitstream.

A non-transitory computer readable medium comprising a computer program product for use by a video coding device, the computer program product comprising computer executable instructions stored on the non-transitory computer readable medium such that when executed by a processor cause the video coding device to:

• partition a transform tree node (TTN) using a vertical binary tree split when a first TTN dimension is greater than a maximum transform unit (TU) size for the TTN and when the first TTN dimension is greater than a second TTN dimension, wherein the vertical binary tree split is implemented according to the following syntax:
• verSplitFirst=(tbWidth>MaxTbSizeY && tbWidth>tbHeight)?1:0;
• apply TUs to residuals to generate transform coefficients after the TTN has been partitioned;
• and
• encode the transform coefficients into a bitstream.