Sub-Picture Signaling for Selective Temporal Motion Constraints
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Solution Overview
Problem
Existing video coding systems face inefficiencies in managing sub-pictures, particularly in region of interest-based applications, where all sub-pictures are treated as temporal motion constrained, leading to reduced coding efficiency without practical benefits for regions outside the region of interest.
Innovation Solution
Implementing a flag in the Sequence Parameter Set (SPS) to indicate whether a sub-picture is temporal motion constrained, allowing a mixture of temporal motion constrained and non-motion constrained sub-pictures, enhancing coding efficiency and resource usage by reducing network, memory, and processing resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all sub-pictures are set to be temporal motion constrained, then independent extraction functionality is provided, but coding efficiency decreases
Solution Approach 1:
The patent applies local quality by differentiating sub-pictures into two types: temporal motion constrained sub-pictures (for region of interest with independent extraction needs) and temporal motion non-constrained sub-pictures (for other regions with higher coding efficiency requirements). Each sub-picture type is assigned different coding constraints and parameters, allowing optimal performance for each specific region rather than applying uniform constraints across all sub-pictures.
2Adaptability or versatility
If temporal motion constrained sub-pictures are used for region of interest, then independent extraction is enabled, but network, memory, and processing resources increase
Solution Approach 1:
The patent segments the picture into multiple sub-pictures, where only the necessary region of interest is marked as temporal motion constrained and extracted independently. Other sub-pictures can be processed using more efficient non-constrained methods. This segmentation allows selective application of resource-intensive extraction only where needed, rather than applying it uniformly across the entire picture.
Data Source
AI summary
A video coding mechanism is disclosed. The mechanism includes a bitstream comprising a parameter set and one or more sub-pictures partitioned from a picture. The parameter set is parsed to obtain a flag indicating that a current sub-picture is a temporal motion constrained sub-picture. The current sub-picture is extracted from the bitstream independently of the picture and based on the flag. The current sub-picture is decoded to create a video sequence. The video sequence is forwarded for display.