Video Coding Block Sub-Region Residue Extraction
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Solution Overview
Problem
Existing video coding technologies face challenges in efficiently reducing redundancy in video signals while maintaining acceptable quality, particularly in high-resolution and high-frame-rate videos.
Innovation Solution
The proposed method involves processing circuitry that decodes encoding information for a block of a picture in a coded video bitstream, reconstructing samples inside a combined sub-region using residue data, and reconstructing samples outside the combined sub-region without residue data, utilizing a combined block that includes the original block and neighboring blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motion compensation with motion vectors is used for video coding, then prediction accuracy is improved, but data quantity increases due to storing and transmitting motion vector information
Solution Approach 1:
The patent extracts and removes residue data for specific sub-regions (such as center regions) from the coded data stream. By identifying that certain regions have negligible residue values, the patent selectively discards this redundant information, thereby reducing the overall data quantity while preserving prediction accuracy in the extracted sub-regions.
Solution Approach 2:
The patent applies different coding strategies to different spatial regions within a video block. Specifically, it identifies sub-regions with different residue characteristics and processes them differently - some regions have their residue data fully coded while others have residue data removed or simplified, optimizing the balance between accuracy and compression for each local area.
2Productivity
If compression is applied to reduce bandwidth requirements, then transmission efficiency is improved, but reconstruction quality deteriorates due to lossy compression
Solution Approach 1:
The patent changes the parameter of residue data representation by selectively removing or simplifying residue information for specific sub-regions. This parameter modification allows the system to achieve higher compression ratios while maintaining acceptable reconstruction quality, as the removed residue data corresponds to regions where the impact on visual quality is minimal.
3Measurement precision
If residue data is coded for all blocks, then reconstruction accuracy is improved, but compression ratio deteriorates due to increased data volume
Solution Approach 1:
The patent extracts and removes residue data for specific sub-regions (such as center regions) from the coded data stream. By identifying that certain regions have negligible residue values, the patent selectively discards this redundant information, thereby reducing the overall data quantity while preserving prediction accuracy in the extracted sub-regions.
Solution Approach 2:
Instead of coding residue data for entire blocks, the patent applies partial action by coding residue data only for specific portions of blocks where it provides significant benefit. This selective approach achieves sufficient reconstruction accuracy for the important regions while avoiding the excessive data volume that would result from coding all residue data uniformly.
Data Source
AI summary
Methods and apparatuses for video coding. An example method includes: encoding information associated with a block of a picture to be included in a coded video bitstream. The encoding information indicating a position of a sub-region in the block and a position of an additional sub-region in each of at least one neighboring block of the block, a combined sub-region including the sub-region and the additional sub-region in each of the at least one neighboring block being at a center of a combined block including the block and the at least one neighboring block, wherein an outside area within the combined block completely surrounds and is outside of the combined sub-region, the combined sub-region and the outside area being determined based on the combined sub-region having residue data of samples above a predetermined threshold and the outside area having residue data of samples below or equal to the predetermined threshold.