Modified Intra Prediction for Non-Square Video Blocks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing video encoding technologies face challenges in efficiently processing next-generation video content with high spatial resolution and frame rates, requiring improved prediction techniques for accurate compression and reduced memory and processing demands.
Innovation Solution
A method and device for video signal processing that employs a wide angle intra prediction mode, adjusting intra prediction modes based on block dimensions, and applying non-separable transforms to enhance prediction accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional intra prediction modes are used, then the processing is simple, but the prediction accuracy is insufficient for high-resolution video content
Solution Approach 1:
The patent divides the intra prediction modes into different categories (first intra prediction modes and second intra prediction modes) based on block shape and prediction direction. This segmentation allows the system to apply different prediction strategies to different blocks, improving prediction accuracy for high-resolution content while maintaining manageable complexity through structured classification.
Solution Approach 2:
The patent dynamically selects between different intra prediction modes based on the block shape (square vs. non-square) and prediction direction. The system adapts the prediction mode selection to the specific characteristics of each block, enabling optimized prediction accuracy for diverse block types in high-resolution video content.
2Productivity
If transform is applied to all blocks, then processing is uniform, but transform efficiency is reduced for blocks that do not benefit from transform
Solution Approach 1:
The patent applies transform selectively only to blocks that benefit from it, rather than uniformly to all blocks. Specifically, transform is applied to non-square blocks with certain prediction modes while skipping transform for square blocks or blocks where prediction residuals are minimal. This partial application improves transform efficiency by avoiding unnecessary processing on blocks that do not benefit from transform.
3Measurement precision
If wide angle intra prediction is applied to all blocks, then prediction coverage is maximized, but processing time increases
Solution Approach 1:
The patent applies wide angle intra prediction locally only to blocks that require it, based on their shape and prediction mode characteristics. Non-square blocks with specific prediction modes receive wide angle prediction treatment, while square blocks or blocks with different characteristics use standard prediction. This localized application maintains prediction accuracy for wide angle content while minimizing processing time by avoiding unnecessary processing on blocks that do not benefit from the enhanced prediction.
Data Source
AI summary
Embodiments in the present specification provide a video signal processing method and device. A method of processing a video signal according to an embodiment in the present specification comprises the steps of: acquiring an intra-prediction mode for a current block from the video signal; determining a modified intra-prediction mode from the intra-prediction mode for the current block on the basis of the width and height of and the intra-prediction mode for the current block; and applying a transform determined on the basis of the modified intra-prediction mode. The accuracy of prediction can be further improved by deriving a modified intra-prediction mode according to a wide-angle intra-prediction mode according to the shape of and an intra-prediction mode for a current block.