MPM List Construction for Intra Prediction Coding Efficiency
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images and videos, particularly in immersive media formats like VR and AR, has led to a need for more efficient image and video compression technologies to reduce transmission and storage costs.
Innovation Solution
An image coding method and apparatus that utilizes a Most Probable Mode (MPM) list in multiple reference line-based intra prediction to derive candidate intra prediction modes, improving coding efficiency by reducing computational complexity and bit allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution and high-quality images and videos are transmitted or stored, then image and video quality is improved, but transmission costs and storage costs are increased
Solution Approach 1:
The patent segments the image data into blocks and applies different prediction methods to different blocks. Intra prediction is applied to blocks with similar characteristics while inter prediction is applied to blocks with different characteristics, allowing efficient compression without losing quality
Solution Approach 2:
The patent dynamically adjusts prediction parameters based on block characteristics. The system selects between intra prediction and inter prediction methods, and adjusts prediction modes according to the specific characteristics of each block, optimizing compression efficiency
2Productivity
If conventional image coding methods are used, then implementation simplicity is maintained, but coding efficiency is insufficient for high-resolution content
Solution Approach 1:
The patent implements dynamic prediction mode selection where the system automatically chooses between intra prediction and inter prediction based on block characteristics. The prediction mode is not fixed but adapts dynamically to the specific content and block properties, optimizing compression efficiency
Solution Approach 2:
The patent performs preliminary analysis of block characteristics before applying prediction methods. The system evaluates block properties in advance to determine the most suitable prediction approach, preparing the prediction parameters before actual encoding to improve overall efficiency
Data Source
AI summary
An image decoding method according to the present document derives a left mode, which is a candidate intra prediction mode for a left peripheral block of a current block, derives an upper mode, which is a candidate intra prediction mode for an upper peripheral block of the current block, constructs an MPM list on the basis of the left mode and the upper mode, derives an intra prediction mode of the current block on the basis of the MPM list, generates prediction samples of the current block on the basis of the intra prediction mode, generates a restoration picture of the current block on the basis of the prediction samples, and derives the left mode or the upper mode as one from among candidate intra prediction modes of the MPM list, on the basis of when the left mode and the upper mode are not the same and the left mode and the upper mode are respectively a planar mode and a DC mode.