Wide-Angle Intra Prediction Using Reused Filtered References
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Solution Overview
Problem
Existing video coding standards face challenges in balancing bandwidth requirements and video quality, particularly in high-resolution videos, with intra prediction schemes being complex and inefficient.
Innovation Solution
A method and apparatus for intra prediction that utilizes integer slope wide-angle modes, combining directional prediction with additional prediction signals, and unifies reference sample processing to improve visual quality by reusing filtered reference samples for both processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional intra prediction schemes are used, then video coding compression is achieved, but the prediction complexity increases and visual quality deteriorates
Solution Approach 1:
The patent segments the prediction process into two distinct stages: first performing directional prediction using reference samples, then applying additional prediction based on the initial prediction results. This segmentation allows each stage to focus on specific aspects of prediction, improving overall accuracy while managing complexity through structured processing steps.
Solution Approach 2:
The patent applies preliminary directional prediction to generate initial predicted samples before applying additional prediction. This preliminary action establishes a foundation that guides subsequent processing, enabling the system to leverage initial predictions to improve final results without requiring complete redesign of the prediction architecture.
2Productivity
If reference samples are processed separately for directional prediction and additional prediction, then each process receives optimal input, but computational resources are wasted through redundant processing
Solution Approach 1:
The patent merges the reference sample processing into a single unified operation that serves both directional prediction and additional prediction. By processing reference samples once and reusing the results, the system eliminates redundant computational operations, significantly improving processing efficiency and reducing energy consumption while maintaining prediction quality.
Solution Approach 2:
The patent creates a universal reference sample processing mechanism that performs multiple functions: it provides input for directional prediction and simultaneously serves as input for additional prediction. This multi-functionality allows a single processing operation to support multiple prediction stages, maximizing resource utilization and minimizing waste.
Data Source
AI summary
A method of intra prediction of a block in a picture of a video is disclosed. The method includes obtaining an intra prediction mode of the block; determining whether the intra prediction mode of the block is a wide-angle mode; filtering reference samples for the block based, at least in part, upon determining that the intra prediction mode of the block is the wide-angle mode; and generating predicted samples of the block based on filtered reference samples.