Intra Prediction Mode Selection for Faster Image Encoding
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images, particularly stereo-scopic content, has led to higher data volumes and associated transmission and storage costs, necessitating more efficient image compression techniques.
Innovation Solution
An intra prediction method and device that determines an intra prediction mode for encoding/decoding an image signal by calculating costs for multiple modes based on reference regions and selecting the lowest-cost modes for improved encoding efficiency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple intra prediction modes are evaluated based on reference regions, then encoding accuracy is improved, but computational complexity increases
Solution Approach 1:
The patent divides the current block into a reference region and a non-reference region, evaluating prediction modes separately on different parts of the block. This segmentation allows comprehensive mode evaluation while reducing the computational burden on the entire block at once.
Solution Approach 2:
The patent performs preliminary intra prediction on the reference region before processing the non-reference region. By pre-evaluating prediction modes on the reference region, the system establishes a foundation for subsequent prediction while avoiding redundant computations in the non-reference region.
2Productivity
If intra prediction is performed on the entire current block, then encoding completeness is improved, but processing time increases
Solution Approach 1:
The patent segments the current block into reference and non-reference regions, applying different prediction strategies to each. This allows parallel processing and reduces the time required to process the entire block compared to uniform processing.
Solution Approach 2:
By performing prediction on the reference region first and using those results to guide the non-reference region processing, the system reduces overall processing time through optimized prediction order and reduced computational requirements in subsequent steps.
Data Source
AI summary
An image encoding/decoding method according to the present invention comprises: determining at least one intra prediction mode for a current block; and on the basis of the at least one intra prediction mode, performing intra prediction on the current block. Here, the at least one intra prediction mode may be determined on the basis of a cost derived by performing intra prediction on a reference region of the current block on the basis of each of a plurality of intra prediction modes.