Advances in Visual Data Compression and Communication

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2.4 HEVC Standard 41

Figure 2.11 The framework of the HEVC standard.

of CTUs larger than in previous standards is particularly beneficial when encoding

high-resolution video content.

Coding units (CUs) and coding blocks (CBs) — CTUs are further partitioned

into CUs. As shown in Figure 2.12, the partitioning is achieved using quarter-tree

structures and is iterated until the size for a luma CB reaches a minimum allowed

CB size that is always 8 × 8 or larger. Thus CUs always cover a square picture

area. Intra- or inter-prediction mode is determined at the CU level. For every CU, PU

decides its prediction partition and TU decides its transform partition. ...