Chroma Block Prediction Using Downsampled Luma Reference
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Solution Overview
Problem
Existing video compression technologies struggle to efficiently encode and decode high-resolution and stereoscopic image content, particularly in the context of chroma blocks, where intra and inter prediction methods are not optimized, leading to inefficiencies in encoding and decoding processes.
Innovation Solution
A method and device that adaptively partitions pictures, utilizing intra and inter prediction techniques, including inter-component reference-based prediction, to enhance encoding and decoding efficiency by determining intra prediction modes for chroma blocks, specifying luma regions for inter-component reference, and downsampling these regions to derive parameters for accurate prediction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional intra and inter prediction methods are used for chroma blocks, then encoding and decoding processes are simpler, but encoding and decoding efficiency deteriorates for high-resolution and stereoscopic content
Solution Approach 1:
The prediction process is segmented into multiple stages: determining intra prediction mode, specifying luma regions for inter-component reference, downsampling specified regions, deriving parameters, and predicting chroma blocks. This segmentation allows each stage to be optimized independently, improving overall encoding efficiency without overwhelming system complexity
Solution Approach 2:
The patent introduces inter-component reference-based prediction, which utilizes luma component information to predict chroma components. This cross-component approach adds a new dimension to traditional intra/inter prediction methods, enabling more efficient compression of high-resolution and stereoscopic content by exploiting correlations between color channels
2Loss of substance
If high-resolution and stereoscopic image content is compressed using conventional methods, then implementation is simpler, but compression effectiveness deteriorates
Solution Approach 1:
The patent performs preliminary downsampling of specified luma regions before deriving prediction parameters. This preliminary processing reduces the complexity of subsequent parameter derivation while preserving essential information needed for accurate chroma prediction, thereby improving compression effectiveness without proportionally increasing overall processing complexity
Solution Approach 2:
The patent derives specific parameters from downsampled luma regions that are tailored for chroma prediction. By transforming luma data into optimized prediction parameters through downsampling and selective processing, the system achieves better compression ratios for high-resolution content while managing processing complexity through intelligent parameter selection
Data Source
AI summary
The video encoding/decoding method and device according to the present invention can determine an intra prediction mode of a chroma block, specify a luminance area for inter-component reference of the chroma block, downsample the specified luminance area, derive parameters for the inter-component reference of the chroma block, apply the parameters to the downsampled luminance area, and thereby predict the chroma block.