Video Signal Intra Prediction Using Non-Neighboring Block Modes
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Solution Overview
Problem
Existing video signal encoding/decoding methods face challenges in efficiently performing intra prediction, particularly when dealing with high-resolution and stereographic image content, leading to increased data transmission and storage costs.
Innovation Solution
The method and apparatus derive Most Probable Mode (MPM) candidates based on intra prediction modes of neighboring and non-neighboring candidate blocks, using right and bottom reference samples to determine the intra prediction mode of the current block, and allocate indices based on priority and shape similarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional intra prediction methods are used, then the encoding/decoding process is simple, but the prediction efficiency is insufficient for high-resolution video signals
Solution Approach 1:
The patent segments the prediction process by considering multiple candidate blocks (neighboring blocks and non-neighboring blocks) separately and deriving MPM candidates from each segment. This allows the system to handle high-resolution video signals by processing prediction modes in discrete, manageable segments rather than attempting to process the entire signal at once, thereby improving prediction efficiency without overwhelming complexity.
Solution Approach 2:
The patent introduces a new dimension to intra prediction by incorporating non-neighboring blocks into the MPM candidate derivation process. Traditional methods only considered neighboring blocks, but this invention extends the prediction scope to include blocks at different spatial distances, adding a dimensional aspect to the prediction process that enhances efficiency for high-resolution content.
2Measurement precision
If only neighboring blocks are used for MPM candidate derivation, then the process is simple, but prediction accuracy is reduced
Solution Approach 1:
The patent applies universality by making the MPM candidate derivation process applicable to both neighboring and non-neighboring blocks. The same derivation mechanism works for different types of candidate blocks, allowing the system to universally utilize available block information regardless of spatial proximity. This multi-functional approach improves prediction accuracy by maximizing the utilization of available data without requiring separate processing paths.
Solution Approach 2:
The patent performs preliminary action by pre-identifying and pre-processing both neighboring and non-neighboring candidate blocks before final MPM selection. The system prepares MPM candidates from all available blocks in advance, allowing the final prediction mode to be selected from a comprehensive pre-processed set. This preliminary processing of multiple block types enhances accuracy while managing complexity through structured preparation.
3Quantity of substance
If high-resolution video signals are processed with conventional methods, then the data quality is maintained, but transmission and storage costs increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the MPM candidate derivation process based on the characteristics of high-resolution video signals. The system modifies which candidate blocks are considered and how MPM candidates are selected according to the specific properties of the input signal. This adaptive parameter adjustment allows efficient encoding/decoding of high-resolution content by optimizing the prediction process for the actual data characteristics, thereby reducing transmission and storage requirements while maintaining quality.
Data Source
AI summary
An image decoding method according to the present invention comprises the steps of: deriving most probable mode (MPM) candidates on the basis of an intra-prediction mode of candidate blocks; determining whether the MPM candidate having the intra-prediction mode, which is the same as that of a current block, exists among MPM candidates; and deriving the intra-prediction mode of the current block on the basis of the determination, wherein the candidate block includes a neighboring block which is adjacent to the current block, and a non-neighboring block which is not adjacent to the current block.