Stereoscopic Graphics Depth Shifting for 3D Video Playback
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Solution Overview
Problem
Current graphics composition techniques for stereoscopic video playback often result in uncomfortable viewing experiences due to the lack of left-view and right-view graphics data, leading to flat graphics being buried within the video, causing unnatural depth perception and discomfort for viewers.
Innovation Solution
A playback apparatus that shifts graphics data to adjust depth positions, allowing for natural stereoscopic composition even when only one eye's graphics data is available, by using a composition unit and shift engine to composite graphics with video frames, effectively creating the illusion of depth without requiring separate left-view and right-view graphics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate left-view and right-view graphics data are prepared for stereoscopic video, then natural depth perception is achieved, but storage capacity requirements increase and device complexity increases
Solution Approach 1:
The patent uses 2D graphics as a template or copy that can be reused for both left-view and right-view stereoscopic graphics. Instead of creating completely separate graphics data for each eye, the system copies the 2D graphics and applies depth adjustments through coordinate shifting, significantly reducing the total graphics data volume while maintaining natural depth perception
Solution Approach 2:
The patent makes 2D graphics serve multiple functions: they act as the base layer for both left-view and right-view stereoscopic display, and also serve as the template for generating depth-adjusted graphics. This multi-functionality eliminates the need to create separate graphics data for each view, reducing storage requirements while achieving natural stereoscopic depth
2Device complexity
If 2D graphics are composited with stereoscopic video without depth adjustment, then device complexity is reduced, but viewing comfort deteriorates due to flat graphics appearing buried in video
Solution Approach 1:
The patent transitions 2D graphics into 3D space by applying depth adjustments through coordinate shifting. The graphics are shifted along the depth axis (z-axis) to create the perception of three-dimensional positioning, allowing flat graphics to appear naturally positioned in front of or behind the video content, significantly improving viewing comfort
Solution Approach 2:
The patent implements dynamic depth adjustment where the graphics plane position can be changed based on different viewing conditions and content requirements. The system can dynamically shift graphics coordinates to adjust depth perception, making the composition adaptable to different scenarios while maintaining viewing comfort
3Manufacturing precision
If frame rate is increased to 120 fps for stereoscopic video playback, then stereoscopic effect quality is improved, but response performance requirements increase and energy consumption increases
Solution Approach 1:
The patent merges the 2D graphics rendering with the stereoscopic video playback process. By compositing depth-adjusted graphics with the left-view and right-view video frames, the system achieves smooth stereoscopic playback without needing to independently render and encode separate graphics streams at high frame rates, thereby reducing energy consumption
Solution Approach 2:
The patent performs preliminary depth adjustment and coordinate shifting of graphics during the composition stage before final display. By pre-calculating and applying the necessary depth transformations to graphics, the system avoids the need for real-time high-speed rendering of separate left-view and right-view graphics at 120 fps, reducing the response performance and energy requirements
Data Source
AI summary
The playback apparatus realizes stereoscopic viewing by overlaying planar or stereoscopic graphics over stereoscopic video in a way that reduces eye strain using following method in abstract: A graphics plane holds therein data composed of graphics data. A shift engine shifts, in a case when a composition unit composites the graphics data with a left-view video frame, coordinates of each of the pixels is shifted in a first horizontal direction, and in a case when the composition unit composites the graphics data with a right-view video frame, coordinates of each of the pixels is shifted in a second horizontal direction that is opposite to the first direction.