Palette Coding Partitioning for Video Compression Efficiency
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Solution Overview
Problem
Current video coding technologies face challenges in achieving efficient compression and decompression of video data, particularly with limited network resources and the need for higher video quality, where existing methods often compromise on compression ratio or picture quality.
Innovation Solution
The implementation of a method that considers the partitioning type of a coding unit (CU) during palette coding, allowing for efficient syntax signaling and decoding by separating palette coding information for luma and chroma components, enabling more efficient encoding and decoding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If separate tree partitioning is used to improve compression efficiency, then compression ratio is improved, but device complexity increases due to separate luma and chroma partitioning trees
Solution Approach 1:
The patent applies segmentation by dividing the coding unit partitioning into separate luma and chroma trees. The luma CU and chroma CU are partitioned independently using separate quad-tree structures, allowing each component to be optimized separately for compression efficiency while maintaining manageable complexity through modular organization.
2Productivity
If palette coding information is signaled separately for luma and chroma components in separate tree partitioning, then encoding efficiency is improved, but syntax complexity increases
Solution Approach 1:
The patent applies local quality by allowing different palette coding parameters (PaletteModeFlag, palette_entries, palette_colors) to be independently configured and signaled for luma and chroma components. This enables each color component to use optimization strategies tailored to its specific characteristics, improving overall encoding efficiency.
3Productivity
If video data is compressed to reduce data size for limited bandwidth, then transmission efficiency is improved, but picture quality may be compromised
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting palette coding parameters such as the number of palette entries and the selection of representative colors based on the specific characteristics of each coding unit. This allows the encoder to adapt the compression level and method to preserve important visual information while achieving efficient compression for transmission.
Data Source
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AI summary
The present disclosure relates to decoding and encoding methods as well as to decoding and encoding apparatuses and to a program. In particular, a partitioning type of a subject coding unit, CU, is determined. The partitioning type is either a single partitioning type, in which a subject coding unit is partitioned into a single CU including one luma coding block, CB, and two chroma CBs, or a separate partitioning type, in which a subject coding unit is partitioned into a separate luma CU including a luma CB only and a chroma CU including two chroma CBs only. Based on the partitioning type of the subject CU, the subject CU and an associated palette coding information are decoded from a bitstream (in case of the decoding method /apparatus) or inserted into the bitstream (in case of the encoding method /apparatus).