Video Intra Prediction Using Sequential Sub-Block Partitioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing video encoding/decoding technologies face inefficiencies in performing intra prediction, particularly for high-resolution and stereographic image content, leading to increased data transmission and storage costs.
Innovation Solution
The method and apparatus partition the current block into sub-blocks and perform intra prediction sequentially, allowing sub-blocks to share an intra prediction mode, with adjacent sub-blocks using reference samples for prediction, and varying sub-block shapes based on the current block's intra prediction mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional image encoding/decoding techniques are used, then data transmission and storage costs increase with higher resolution and quality, but the patent applies sub-block partitioning and sequential intra prediction to reduce these costs
Solution Approach 1:
The patent divides the current block into multiple sub-blocks and performs intra prediction sequentially on each sub-block. This segmentation allows the encoder to process smaller units with shared prediction modes, reducing the overall data size and transmission cost while maintaining prediction accuracy for high-resolution content.
Solution Approach 2:
The patent applies different intra prediction modes to different sub-blocks based on their local characteristics and positions. By allowing sub-blocks to share prediction modes and using reference samples from adjacent sub-blocks, the system optimizes prediction quality locally while reducing global data requirements.
2Productivity
If sub-block partitioning is applied, then intra prediction efficiency improves and data costs reduce, but the complexity of the encoding/decoding process increases
Solution Approach 1:
The patent merges the intra prediction mode decision across multiple sub-blocks by allowing them to share common prediction modes. This merging reduces the number of independent prediction mode decisions that need to be encoded and decoded, thereby reducing processing complexity while maintaining the benefits of sub-block partitioning.
Solution Approach 2:
The patent performs preliminary actions by determining the intra prediction mode for the current block before processing individual sub-blocks. This preliminary mode decision is then shared across sub-blocks, reducing the computational burden during the actual prediction process.
Data Source
AI summary
The image decoding method according to the present invention comprises the steps of determining an intra prediction mode of a current block, dividing the current block into a plurality of subblocks, and for the plurality of subblocks, sequentially performing intra prediction.