Video Prediction Mode Signaling for High-Resolution Decoding
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Solution Overview
Problem
The challenge of efficiently encoding and decoding digital video data, particularly at high resolutions such as 4K×2K or 8K×4K, while maintaining image quality, is a constant concern due to the exponential growth in data volume.
Innovation Solution
Implementing a method for decoding video data that involves retrieving specific syntax elements from a bitstream based on parameter sets, using palette mode, intra prediction mode, or inter prediction mode, depending on the values of these elements, to optimize the decoding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional video compression standards are used for high-resolution video, then data volume increases exponentially, but encoding and decoding efficiency deteriorates
Solution Approach 1:
The video block is divided into multiple sub-blocks for independent prediction mode selection. Each sub-block can have its own prediction mode, allowing fine-grained optimization of compression efficiency while managing complexity through localized decision-making rather than processing the entire block at once.
Solution Approach 2:
The prediction mode selection is made dynamically based on local characteristics of each sub-block. The encoder evaluates multiple prediction modes for each sub-block and selects the optimal mode based on rate-distortion optimization, enabling adaptive compression that responds to local video content variations.
2Productivity
If multiple prediction modes are used for different blocks, then compression efficiency improves, but device complexity increases
Solution Approach 1:
By segmenting the block into sub-blocks, the complexity of evaluating multiple prediction modes is distributed across smaller units. Each sub-block requires independent mode selection, but the overall complexity is managed through the hierarchical structure where sub-blocks are processed within the context of the parent block.
Solution Approach 2:
Different prediction modes are applied to different sub-blocks based on their local characteristics. This allows the system to use complex multiple mode selection only where necessary (in regions with varying characteristics) while using simpler modes in uniform regions, optimizing the trade-off between compression efficiency and complexity.
Data Source
AI summary
A method of decoding video data includes receiving, from bitstream, video data corresponding to a non-skip mode coded block; and determining a parameter set associated with the non-skip mode coded block. In accordance with a determination that the parameter set includes information that satisfies different conditions, the method further includes receiving a first syntax element, a second or a third syntax element from the bitstream, the first syntax element is received and the first syntax element has a first value, the third syntax element is received. The method further includes decoding the non-skip mode coded block based on palette mode when the first syntax element has a first value and the third syntax element has the first value; and decoding the non-skip mode coded block based on intra prediction mode when the first syntax element has the first value and the third syntax element has a second value.