Inter Prediction Merge Signaling for Efficient Image Coding
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Solution Overview
Problem
The increasing demand for high-resolution, high-quality images and videos, particularly in virtual reality and augmented reality, necessitates a more efficient image/video compression technique to reduce transmission and storage costs while handling diverse image/video characteristics.
Innovation Solution
A method and apparatus for enhancing image coding efficiency through inter prediction, including combined inter-picture and intra-picture prediction (CIIP) and efficient signaling of merge data syntax, using flags and conditions to optimize block processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional inter prediction methods are used for high-resolution images, then transmission and storage costs increase, but image quality and resolution requirements cannot be met
Solution Approach 1:
The patent divides the current block into multiple sub-blocks and performs separate prediction for each sub-block. This segmentation allows for more precise local prediction, improving image quality while maintaining compression efficiency by adapting to local variations in the image content.
Solution Approach 2:
The patent applies different prediction modes and techniques to different regions of the image based on local characteristics. By analyzing local patterns and applying appropriate prediction methods to each region, the patent achieves high image quality without uniformly increasing compression overhead across the entire image.
2Manufacturing precision
If multiple prediction modes and flags are signaled for each block, then coding precision improves, but device complexity and signaling overhead increase
Solution Approach 1:
The patent applies advanced prediction techniques selectively rather than universally. By using complex prediction modes only when beneficial and falling back to simpler modes otherwise, the patent achieves high coding precision where needed while minimizing signaling overhead in regions where simple prediction suffices.
Solution Approach 2:
The patent segments the decision-making process by evaluating different prediction modes for different sub-blocks independently. This allows the system to achieve high overall precision by optimizing each segment locally without requiring complex global signaling, thereby reducing device complexity while maintaining coding precision.
Data Source
AI summary
A decoding method performed by a decoding device, according to the present document, may comprise the steps of: acquiring, from a bitstream, at least one of a combined inter-picture merge and intra-picture prediction (CIIP) enable flag and a coding unit (CU) skip flag indicating whether a skip mode is applied to a current block; acquiring, from the bitstream, a regular merge flag on the basis that a condition based on the current block size, and at least one of a condition based on the CIIP enable flag and a condition based on the CU skip flag are satisfied; generating prediction samples of the current block on the basis of the regular merge flag; and generating restoration samples on the basis of the prediction samples.