Spatial varying transform for video coding

A video coding device comprising:

• a receiver configured to receive a bitstream including a prediction block and a residual block with coefficients transformed by a Spatial Varying Transform (SVT);
• and
• a processor coupled to the receiver, the processor configured to:
• determine a type of SVT block employed to transform the coefficients in the residual block;
• determine a position of the SVT block relative to the residual block using an integer representing a pre-defined step size, a position index for the SVT block, and a height or width of the residual block, wherein the pre-defined step size is greater than one and is based on the height or width of the residual block, wherein the position index for the SVT block is derived based on levels of the coefficients received in the bitstream;
• apply an inverse transform to the coefficients based on the SVT block type and the position to create a reconstructed residual block;
• apply the reconstructed residual block to the prediction block to reconstruct a video block;
• and
• reconstruct a video sequence for display, the video sequence including a video frame that includes the reconstructed video block.