Coding Unit Split Prediction for High-Resolution Video Decoding
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Solution Overview
Problem
The use of uniform square coding units in video encoding and decoding leads to image quality deterioration when reconstructing high-resolution images, necessitating methods for partitioning high-resolution images into coding units with various non-uniform shapes.
Innovation Solution
A block partitioning prediction scheme is employed, where the split prediction for a current coding unit is determined by referring to spatially or temporally adjacent neighboring areas, reducing the computational and data requirements for block splitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform square coding units are used for video encoding and decoding, then the encoding process is simple, but image quality deteriorates when reconstructing high-resolution images
Solution Approach 1:
The current coding unit is divided into multiple sub-coding units with different shapes and sizes. Instead of using a single uniform square coding unit, the patent segments the coding area into various non-uniform shapes to better represent high-resolution image details, thereby improving image quality while maintaining encoding efficiency through selective use of different partitioning patterns.
Solution Approach 2:
Different regions of the image are encoded with different coding unit shapes and sizes according to local characteristics. The patent applies local quality by adapting the coding unit configuration to match the local image content requirements, using non-uniform shapes in areas needing higher precision and uniform shapes in areas where simplicity suffices, thus resolving the contradiction between encoding simplicity and image quality.
2Device complexity
If block partitioning prediction is applied using neighboring area information, then computational complexity and data requirements are reduced, but prediction accuracy may be compromised
Solution Approach 1:
The patent performs preliminary action by pre-establishing prediction models based on neighboring area information before actual block partitioning. The decoder uses previously decoded neighboring blocks to predict the partitioning structure of the current block, avoiding the need to transmit explicit partitioning information and reducing computational complexity while maintaining acceptable prediction accuracy through spatial correlation exploitation.
Solution Approach 2:
The patent applies copying by replicating the partitioning structure from neighboring areas to the current coding unit. Instead of independently determining the partitioning for each block, the system copies the partitioning pattern from spatially adjacent blocks, significantly reducing the computation amount and data requirements while leveraging the statistical similarity between neighboring regions to maintain prediction accuracy.
Data Source
AI summary
A video decoding method including: determining whether to apply split prediction for a current coding unit; based on the split prediction being applied to the current coding unit, determining a neighboring area of the current coding unit; predicting a split scheme for the current coding unit using split-associated information obtained from the neighboring area; based on the split scheme indicating a split of the current coding unit, obtaining at least one lower coding unit by splitting the current coding unit according to the split scheme; and based on the split scheme indicating no split of the current coding unit, decoding the current coding unit, wherein the neighboring area is included in a current picture including the current coding unit, or included in a picture decoded before the current picture.