Adaptive Lenslet Light Field Transmission
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Solution Overview
Problem
Current methods for transmitting and rendering high-fidelity light field video content are inefficient due to the vast amount of data required, leading to bottlenecks in real-time transmission and visualization, especially when only a subset of viewpoints is used by the display device.
Innovation Solution
A method that involves receiving a media manifest file describing sub-sampled lenslet representations of light field video content, selecting the appropriate sub-sampled representation based on user viewpoint, bandwidth, and display capabilities, and interpolating views to reconstruct the complete light field image, optimizing data transmission by adjusting spatial resolution and density according to the client's capabilities and user gaze.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If full-resolution light field video content is transmitted, then high-quality rendering is achieved, but data transmission bandwidth requirements increase significantly
Solution Approach 1:
The light field video content is divided into multiple lenslet representations, each corresponding to different spatial regions or angular views. The system transmits only the selected subset of lenslet representations needed for the current viewpoint rather than all representations, reducing data transmission volume while maintaining rendering quality through selective transmission and client-side interpolation of missing views.
Solution Approach 2:
The system adapts the transmission quality and resolution of lenslet representations based on local requirements. Different regions of the light field content are transmitted at different resolutions or densities according to their importance for the current viewpoint, allowing high-quality rendering of visible regions while reducing transmission of less critical areas.
2Loss of information
If high-density lenslet representations are transmitted, then complete light field information is provided, but transmission bandwidth consumption increases
Solution Approach 1:
The system transmits a partial subset of lenslet representations rather than the complete set, relying on interpolation algorithms at the client side to reconstruct missing views. This partial transmission approach reduces bandwidth consumption significantly while maintaining acceptable information completeness for the rendered viewpoint through computational interpolation.
Solution Approach 2:
The system dynamically adjusts parameters such as lenslet sampling density, spatial resolution, and angular resolution based on available bandwidth and display capabilities. By changing these parameters adaptively, the system optimizes the balance between information completeness and transmission efficiency, transmitting only the necessary amount of data for the current viewing conditions.
3Quantity of substance
If adaptive sub-sampling of lenslet representations is implemented, then bandwidth efficiency improves, but system complexity increases
Solution Approach 1:
The adaptive sub-sampling strategies, lenslet selection algorithms, and interpolation methods are pre-configured and described in a manifest file that is transmitted to the client beforehand. This preliminary preparation allows the runtime system to simply follow pre-determined rules for selecting and processing lenslet representations, reducing runtime complexity while maintaining bandwidth efficiency.
Solution Approach 2:
A manifest file serves as an intermediary between the content source and the client, containing pre-computed information about available lenslet representations, their resolutions, and selection criteria. This intermediary structure simplifies the client's decision-making process by providing ready-made guidance on which representations to request and how to interpolate missing views, reducing system complexity.
Data Source
AI summary
Some embodiments of a method may include: streaming a light field lenslet representation of light field video content; and changing resolution of the light field lenslet representation. Some embodiments of a method may include: selecting a lenslet representation from a plurality of lenslet representations of portions of light field content; retrieving a sub-sampled lenslet representation of the selected lenslet representation; and interpolating views from the sub-sampled lenslet representation.