Interlayer Video Decoding Luminance Compensation
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Solution Overview
Problem
The encoding efficiency of interlayer video codecs is reduced due to luminance inconsistencies between views, leading to increased complexity in luminance compensation.
Innovation Solution
An interlayer video decoding method that reconstructs a first layer image and determines whether to perform luminance compensation on a second layer current block based on its partition mode, allowing for appropriate luminance compensation only when necessary, thereby maintaining encoding efficiency and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If luminance compensation is performed on all second layer blocks, then luminance consistency between views is improved, but encoding complexity increases
Solution Approach 1:
The patent applies luminance compensation selectively only to non-split blocks (2N×2N partition mode) rather than all blocks. This local quality approach compensates for luminance differences where they most impact prediction accuracy while avoiding unnecessary processing on already-split blocks, thus resolving the contradiction between improving luminance consistency and reducing encoding complexity
Solution Approach 2:
The patent performs partial luminance compensation by limiting it to specific partition modes (non-split blocks only) rather than applying it universally. This partial action is sufficient to improve interlayer prediction accuracy for the most critical blocks while keeping the overall encoding complexity manageable
2Device complexity
If luminance compensation is performed on non-split blocks only, then encoding complexity is reduced, but luminance inconsistency may persist in split blocks
Solution Approach 1:
The patent accepts partial luminance inconsistency in split blocks as a trade-off for significantly reducing encoding complexity. By applying compensation only to non-split blocks where it has the greatest impact, the patent achieves sufficient luminance consistency for practical purposes while avoiding the excessive complexity of universal compensation
Solution Approach 2:
The patent changes the parameter of luminance compensation application from universal to selective based on partition mode. This parameter change allows the system to adapt the compensation process to the specific characteristics of each block type, optimizing the balance between luminance consistency and encoding complexity
Data Source
AI summary
An interlayer video decoding method comprises reconstructing a first layer image based on encoding information acquired from a first layer bitstream; reconstructing a second layer current block determined as a predetermined partition mode and a prediction mode by using interlayer prediction information acquired from a second layer bitstream and a first layer reference block corresponding to a current block of a first layer reconstruction image that is to be reconstructed in a second layer; determining whether to perform luminance compensation on the second layer current block in a partition mode in which the second layer current block is not split; and compensating for luminance of the second layer current block according to whether luminance compensation is performed and reconstructing a second layer image including the second layer current block of which luminance is compensated for.