CTU depth decision algorithms for HEVC: A survey
Abstract High Efficiency Video Coding (HEVC) surpasses its predecessors in encoding
efficiency by introducing new coding tools at the cost of an increased encoding time-
complexity. The Coding Tree Unit (CTU) is the main building block used in HEVC. In the
HEVC standard, frames are divided into CTUs with the predetermined size of up to 64× 64
pixels. Each CTU is then divided recursively into a number of equally sized square areas,
known as Coding Units (CUs). Although this diversity of frame partitioning increases …
efficiency by introducing new coding tools at the cost of an increased encoding time-
complexity. The Coding Tree Unit (CTU) is the main building block used in HEVC. In the
HEVC standard, frames are divided into CTUs with the predetermined size of up to 64× 64
pixels. Each CTU is then divided recursively into a number of equally sized square areas,
known as Coding Units (CUs). Although this diversity of frame partitioning increases …