Volumetric Video Encoding Depth Layer Indicator
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Solution Overview
Problem
Current methods for generating Computer Generated Holograms (CGHs) from volumetric video content require intensive computational resources, leading to a trade-off between real-time computation and quality, especially when dealing with dynamic 3D content.
Innovation Solution
A method for encoding and decoding volumetric video that includes an indicator specifying the number of depth layers and their values, allowing for adaptive processing to optimize computation time and quality, by signaling this information in a bitstream for layer-based representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If intensive computational resources are used to generate CGH from volumetric video content, then the quality of CGH is improved, but the computation time and device requirements increase
Solution Approach 1:
The patent segments the volumetric video content into multiple depth layers, where each layer represents a specific depth range. This segmentation allows the rendering system to process only the relevant layers for the current viewpoint, significantly reducing the computational load while maintaining CGH quality. The bitstream includes depth layer information that enables the decoder to identify and render only the necessary layers.
Solution Approach 2:
The patent implements dynamic adaptation of the number of depth layers based on device capabilities and available resources. The system can adjust the layer configuration in real-time, using more layers for high-capability devices to achieve higher quality and fewer layers for resource-constrained devices to reduce computation time, thus dynamically resolving the quality-time trade-off.
2Manufacturing precision
If the number of depth layers is increased to improve CGH quality, then the rendering accuracy is improved, but the computational complexity increases
Solution Approach 1:
The patent changes the parameter of depth layer configuration to optimize the balance between rendering accuracy and computational complexity. By signaling the number of depth layers and their specific depth values in the bitstream, the system allows receivers to adjust this parameter according to their capabilities, achieving high rendering accuracy when needed while reducing complexity for resource-constrained devices.
3Productivity
If adaptive processing is implemented to optimize computation time, then the processing efficiency is improved, but the system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-processing the volumetric video content into depth-layered representation during encoding and signaling the depth layer information in advance in the bitstream. This preliminary organization of data allows the decoding and rendering process to be more efficient, as the system doesn't need to perform complex depth analysis during real-time rendering, thus improving processing efficiency without excessive system complexity.
Data Source
AI summary
Methods and apparatuses for encoding/decoding data content representative of a volumetric video are provided, wherein. the encoding/decoding comprises encoding in/decoding from a bitstream. an indicator specifying whether data content has information representative of at least one set of depth layers. the information representative of a set of depth layers specifying a number of depth layers and a depth value for each of the depth layers for a layer-based representation of the volumetric video. Methods and apparatuses for reconstructing Computer Generated Holograms from a reconstructed layered-based representation of the volumetric video are also provided.