3D Video Parallax Adjustment for Screen Size Compatibility
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Solution Overview
Problem
The challenge is to maintain a high stereoscopic effect in 3D video playback across different screen sizes, as the parallax difference between main-view and sub-view images varies with screen size, leading to suboptimal viewing experiences when a 3D video created for one screen size is played on another.
Innovation Solution
A recording medium that includes main-view and sub-view video streams along with metadata containing offset correction values specific to various screen sizes, allowing for appropriate parallax adjustment based on the display device's screen size, ensuring consistent stereoscopic quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a 3D video is created for a specific screen size, then the stereoscopic effect is optimized for that screen size, but the viewing quality deteriorates when played on display devices with different screen sizes
Solution Approach 1:
The patent applies dynamics by making the video plane position adjustable based on display device characteristics. The system dynamically determines the appropriate video plane position according to the screen size of the display device, allowing the stereoscopic video to adapt to different screen sizes while maintaining optimal parallax difference and viewing quality.
Solution Approach 2:
The patent changes the parameter of video plane position based on display device screen size. By storing multiple video planes with different positions and selecting the appropriate one according to the display device's characteristics, the system maintains consistent stereoscopic effect quality across different screen sizes without requiring separate video encodings for each device type.
2Device complexity
If the video plane position is fixed, then the data structure is simple, but the stereoscopic effect quality deteriorates when displayed on devices with different screen sizes
Solution Approach 1:
The patent segments the video content into multiple video planes, each with different positions optimized for specific screen sizes. This segmentation allows the system to store position information separately for each video plane, enabling flexible selection based on display device characteristics while maintaining a manageable data structure through standardized formatting.
Solution Approach 2:
The system dynamically selects the appropriate video plane based on the display device's screen size characteristics. This dynamic selection mechanism allows the patent to maintain simple data storage for each individual video plane while achieving complex adaptive behavior through the selection logic that matches video planes to appropriate devices.
3Ease of operation
If subtitle display regions are uniformly positioned, then the implementation is simple, but the screen use efficiency deteriorates and stereoscopic effect is compromised
Solution Approach 1:
The patent applies local quality by positioning subtitle display regions differently in different playback sections based on the stereoscopic display characteristics of each section. In playback sections with high jump-out levels, subtitles are positioned in regions that do not overlap with the stereoscopic display area, while in other sections subtitles can be positioned to maximize screen utilization. This localized adaptation optimizes both screen efficiency and stereoscopic effect without requiring complex global repositioning.
Data Source
Figure 1A~1C
Figure 2
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AI summary
To aim to increase the use efficiency of a screen on which a subtitle is displayed together with a stereoscopic image. A video shift mode is set for each subtitle. When a stereoscopic image is played back, in accordance with the video shift mode of the subtitle, a video plane is shifted upward or downward to perform cropping processing of collecting black frames provided in the upper end and the lower end of the screen in either one of the upper end and the lower end so as to save a display region of the subtitle.