One-Sided 3D Data Distribution for Volumetric Video Bandwidth Reduction
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Solution Overview
Problem
Existing methods for distributing volumetric video require large bandwidth and processing capacity, leading to high loads on communication networks and servers, and result in quality deterioration during high presence viewing.
Innovation Solution
A distribution control device that creates one-sided 3D data for multiple virtual viewpoints of 3D video content, reducing data amounts of non-visible object portions, and distributes this data to terminals based on user viewing angles, thereby reducing server processing loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If 3D video content with high presence is distributed, then viewing quality is improved, but data amount and processing load increase
Solution Approach 1:
The patent segments the 3D video content into multiple virtual viewpoints, each representing a specific viewing angle. Instead of transmitting complete 3D data for all directions, the system divides the content into discrete viewpoint segments and transmits only the relevant segment based on user position, thereby reducing data amount while maintaining viewing quality.
Solution Approach 2:
The patent applies local quality by creating one-sided 3D data where only the visible portions from each virtual viewpoint are maintained in high detail, while hidden portions are reduced or eliminated. This ensures high viewing quality for the visible area while reducing overall data amount by removing unnecessary hidden geometry.
2Manufacturing precision
If complete 3D data is transmitted for high presence viewing, then viewing quality is improved, but network bandwidth requirement increases
Solution Approach 1:
The patent segments 3D video content into multiple virtual viewpoints and transmits only the specific viewpoint data needed for the user's current position. This segmentation allows the system to send a fraction of the total 3D data rather than complete data, significantly reducing network bandwidth requirements while maintaining high viewing quality for the visible portions.
Solution Approach 2:
The patent transmits only the partial data necessary for the current viewing angle rather than complete 3D data. By sending exactly what is needed (one-sided 3D data for the active viewpoint) and nothing more, the system achieves efficient bandwidth utilization while maintaining sufficient viewing quality.
3Power
If one-sided 3D data is created for multiple virtual viewpoints, then server processing load is reduced, but data preparation complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-processing the 3D video content to create one-sided 3D data for multiple virtual viewpoints before distribution. This upfront preparation work, while complex, is performed once during content creation, and then the pre-processed data can be efficiently distributed without requiring heavy server processing during actual playback, thereby reducing real-time server load.
4Quantity of substance
If compression techniques are applied to reduce data amount, then bandwidth efficiency is improved, but viewing quality deteriorates
Solution Approach 1:
The patent extracts only the necessary visible portions of 3D data for each virtual viewpoint, removing hidden geometry and unnecessary data elements. This extraction approach reduces data amount by eliminating redundant information rather than compressing essential data, thereby maintaining viewing quality while achieving bandwidth efficiency.
Data Source
AI summary
A distribution control device includes a first creation unit configured to create, for each of a plurality of virtual viewpoints arranged for an object represented by 3D data constituting 3D video content, one-sided 3D data in which an amount of data of a portion of the object that cannot be visually recognized from the virtual viewpoint is reduced, and a distribution unit configured to distribute data including a mesh and a texture as one-sided 3D data of one virtual viewpoint among the one-sided 3D data for each of the virtual viewpoints to a terminal of a user according to a viewing angle of the user in a virtual space where the object is arranged.