Geometric Partition Mode for Video Coding Efficiency
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Solution Overview
Problem
Current video coding technologies face challenges in efficiently partitioning coding units for intra and inter predictions, leading to suboptimal compression ratios and increased bandwidth requirements due to limitations in geometric partition modes and prediction direction representations.
Innovation Solution
The method involves partitioning coding units into geometric partitions using a straight partition line, determining prediction modes based on the partition line's location, and reconstructing partitions accordingly, allowing for intra or inter predictions to enhance coding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional intra coding without intra prediction is used, then device complexity is reduced, but compression efficiency deteriorates
Solution Approach 1:
The current picture is divided into multiple blocks, and each block can be independently coded using intra prediction. This segmentation allows the encoder to apply prediction techniques selectively to different regions, improving compression efficiency without requiring complex global processing
Solution Approach 2:
Intra prediction uses already decoded neighboring blocks as reference data to predict current block values before actual encoding. This preliminary prediction reduces the amount of data that needs to be encoded, improving compression efficiency while maintaining relatively simple device complexity
2Productivity
If geometric partition mode with straight partition line is used, then coding efficiency is improved, but device complexity increases
Solution Approach 1:
The coding unit is partitioned into multiple prediction units using a straight partition line at 45 degrees. This segmentation allows different prediction modes to be applied to different partitions, improving coding efficiency through localized optimization while keeping the partitioning rule itself relatively simple
Solution Approach 2:
The partitioning approach changes the orientation parameter (45-degree straight line) to create predictable geometric partitions. This parameter specification simplifies the partitioning process compared to arbitrary shapes, reducing device complexity while maintaining improved coding efficiency
3Loss of substance
If more intra prediction modes are supported, then compression efficiency is improved, but device complexity increases
Solution Approach 1:
Different intra prediction modes can be applied to different prediction units based on local characteristics. The straight partition line enables selective application of prediction modes to different regions, allowing compression efficiency to be improved through local optimization without requiring all modes to be active everywhere, thus managing device complexity
Data Source
AI summary
Coded information of a coding unit (CU) is received. The CU is partitioned into a first partition and a second partition based on a partition index. The partition index indicates a geometric partition mode (GPM) in which the CU is partitioned into the first partition and the second partition by a straight partition line. Based on a location of the straight partition line in the CU, (i) whether a first prediction mode of the first partition of the CU is one of an intra mode and an inter mode and (ii) whether a second prediction mode of the second partition of the CU is one of the intra mode and the inter mode are determined. The first partition of the CU is reconstructed based on the determined first prediction mode and the second partition of the CU is reconstructed based on the determined second prediction mode.