Inter Prediction Mode Selection for Video Coding Efficiency
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Solution Overview
Problem
Current video compression technologies face challenges in efficiently encoding high-resolution video signals, particularly in improving coding efficiency for high-resolution and ultra-high-resolution stereoscopic image content.
Innovation Solution
The proposed method determines inter prediction modes for video blocks, constructs inter prediction candidate lists, and modifies prediction blocks using both inter and intra prediction modes, including spatial and temporal merge candidates, and a combined merge candidate derived from averaging other candidates, with the option to signal or derive modification flags based on block type and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inter prediction mode is used for video blocks, then coding efficiency is improved, but prediction accuracy for certain block types deteriorates
Solution Approach 1:
The patent applies different prediction modes to different blocks within a coding unit based on their characteristics. Specifically, it determines whether to apply inter prediction or intra prediction mode to each block, allowing optimal prediction accuracy for each local region while maintaining overall coding efficiency through selective application.
2Speed
If only inter prediction mode is used, then coding speed is improved, but prediction accuracy for non-uniform blocks deteriorates
Solution Approach 1:
The patent dynamically selects between inter prediction mode and intra prediction mode based on the characteristics of each block. The system adapts its prediction approach in real-time during encoding/decoding, switching modes according to block uniformity and other criteria, thereby achieving both speed and accuracy.
3Measurement precision
If intra prediction mode is applied to all blocks, then prediction accuracy is improved, but coding efficiency deteriorates
Solution Approach 1:
Instead of applying intra prediction mode to all blocks (excessive action), the patent applies it partially only to blocks that require it based on their characteristics. This selective application maintains prediction accuracy where needed while avoiding the efficiency penalty of over-applying intra mode throughout the entire coding unit.
Data Source
AI summary
An encoding/decoding method and device according to the present disclosure may: determine at least one among a plurality of inter prediction modes as the inter prediction mode of the current block; form an inter prediction candidate list on the basis of the determined inter prediction mode; perform motion compensation on the basis of one prediction candidate in the inter prediction candidate list, and generate a first prediction block of the current block; and correct the first prediction block by using a prescribed intra prediction mode.