Decoding of quadtree structure does not represent a significant additional burden because it
can easily be switch into a hierarchical structure by using z-scan. Predictable modes for
interframe encoded CU are using non-square PU, which requires the necessary support for
decoding in the form of additional logic in the decoder which performs multiple conversions
between the raster scan, and the scan-scan. In terms of preserving the speed of bit rates, with
the encoder side, there is a simple algorithm to analyze the structure of the tree to determine
the optimal share of the blocks [7]. CTU sizes are 16 × 16, 32 × 32 and 64 × 64 pixels.
