A coding unit division decision method, device, encoder and storage medium

Abstract

The embodiment of the present application discloses a coding unit division decision method, device, encoder, and computer-readable storage medium. The method includes: determining the current level of the target CU and obtaining the target CU's level according to the preset level prediction rules. Predict the level; then judge whether the current level is smaller than the predicted level; if so, make division decisions on the four sub-CUs of the target CU to obtain the first division decision result; when the first division decision result satisfies the first preset skip condition, determine The division decision result of the target CU is: a comprehensive result composed of the division result of dividing the target CU into four sub-CUs and the first division decision results respectively corresponding to the four sub-CUs of the target CU. In this solution, when the above-mentioned first decision result satisfies the first preset skip condition, it is determined to obtain the division decision result of the target CU, and there is no need to make a mode decision on the target CU, which reduces the amount of calculation and improves the encoding speed.

Description

technical field [0001] The present application relates to the technical field of video encoding and decoding, and in particular to a coding unit division decision method, device, encoder and storage medium. Background technique [0002] Coding Unit (CU for short) is the basic unit of H.265 (High Efficiency Video Coding, also known as HEVC) coding, with a quadtree structure, CU is square, and the size can be 64×64, 32×32, 16×16 and 8×8. Typically, CUs with a size of 64×64 are considered to be at level 0, those with a size of 32×32 to be at level 1, those with a size of 16×16 to be at level 2, and those with a size of 8×8 to be at level 3. In order to improve coding performance, CUs with levels less than 3 can be divided into four equivalent sub-CUs according to the recursive structure of the quadtree. [0003] The CU division decision refers to the decision to divide the CU into a quadtree, and the CU mode decision refers to the Skip (an inter-frame prediction mode), Merge ...

AI Technical Summary

Problems solved by technology

[0004] Since the top-down method needs to be strictly in accordance with the size of the level to make mode decisions layer by layer, specifically, first decide the CU with a smaller level, and then decide the four sub-CUs of the current CU, and traverse all the CUs according to this rule At the CU level, mode decisions are made for each CU level. Therefore, the amount of calculation for encoding is large, resulting in low encoding speed.

Images