3D Visual Dynamic Range Coding Layered Encoding
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Solution Overview
Problem
Current 3D video systems employ stereoscopic image pairs with limited dynamic range, resulting in a pedestrian illusion of depth and are constrained by bandwidth and storage limitations, making it difficult to achieve a superior immersive experience.
Innovation Solution
The method involves layered encoding and decoding of 3D visual dynamic range (VDR) images using a monoscopic SDR base layer and enhancement layers, allowing decoders to extract single-view SDR, 3D SDR, single-view VDR, or 3D VDR signals efficiently, while being backwards compatible with existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If stereoscopic image pairs are used to provide 3D visual experience, then depth perception is improved, but bandwidth and storage requirements increase significantly
Solution Approach 1:
The patent embeds a monoscopic SDR base layer within a 3D VDR enhancement layer structure. The base layer contains a single 2D SDR view that can be decoded independently, while the enhancement layer adds the third dimension and high dynamic range information. This nested structure allows receivers to extract either just the base layer for 2D SDR playback or combine both layers for full 3D VDR experience, efficiently managing bandwidth and storage requirements.
Solution Approach 2:
The patent segments the 3D VDR content into two distinct layers: a monoscopic SDR base layer and a 3D VDR enhancement layer. This segmentation allows different receiver types to selectively process appropriate layers - legacy receivers handle only the base layer, while advanced receivers process both layers to achieve full 3D VDR quality, thus accommodating diverse bandwidth and storage capabilities.
2Manufacturing precision
If high dynamic range content is transmitted to achieve superior immersive experience, then visual quality is improved, but compatibility with legacy systems deteriorates
Solution Approach 1:
The patent creates a universal bitstream structure where a single encoded signal can serve multiple functions and receiver types. The monoscopic SDR base layer ensures compatibility with legacy single-view SDR systems, while the 3D VDR enhancement layer enables advanced receivers to achieve superior immersive experience. This multi-functional design allows the same transmission to satisfy both legacy and advanced system requirements simultaneously.
Solution Approach 2:
The patent performs preliminary encoding of the base layer in monoscopic SDR format before adding the 3D VDR enhancement layer. This preliminary action ensures that legacy systems receiving only the base layer can immediately process and display compatible content without requiring additional processing or conversion, thereby maintaining backward compatibility while enabling future-proof enhancement.
3Adaptability or versatility
If 3D stereoscopic video with left and right eye images is provided, then depth perception is improved, but bandwidth requirements double compared to 2D video
Solution Approach 1:
The patent implements partial action by providing full 3D VDR quality only in the enhancement layer, while the base layer contains a simplified monoscopic SDR representation. Receivers can choose to process only the partial information in the base layer for 2D SDR output, or combine with the enhancement layer for complete 3D VDR experience, thus allowing bandwidth consumption to be proportional to the desired quality level rather than requiring full 3D VDR bandwidth for all receivers.
Data Source
AI summary
A sequence of 3D VDR images and 3D SDR images are encoded using a monoscopic SDR base layer and one or more enhancement layers. A first VDR view and a first SDR view are encoded with a DVDL encoder to output first and second coded signals. A predicted 3D VDR signal is generated, which has first and second predicted VDR views. First and second VDR residuals are generated based on their respective VDR views and predicted VDR views. A DVDL encoder encodes the first and second VDR residuals to output third and fourth coded signals. A 3D VDR decoder, which has two DVDL decoders and SDR-to-VDR predictors use the four coded input signals to generate a single-view SDR, 3D SDR, single-view VDR, or 3D VDR signals. A corresponding decoder is also described, which is capable of decoding these encoded 3D VDR and SDR images.