Stereoscopic Subtitle Depth Adjustment During Video Scaling
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Solution Overview
Problem
Current stereoscopic video playback systems face issues with maintaining a natural stereoscopic effect during scaling, leading to eyestrain due to uneven depth perception between video and subtitles/GUI, especially when scaling is performed, which affects consumer comfort.
Innovation Solution
The stereoscopic video playback apparatus dynamically adjusts the shift distance of subtitles during scaling, allowing for synchronized depth adjustment between video and subtitles, and optionally uses a calculation table method or gradual adjustment to prevent sharp differences in stereoscopic effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If scaling is performed on stereoscopic video with subtitles, then the video can be enlarged or reduced, but the subtitle depth remains unchanged while video depth changes, causing a sharp difference in stereoscopic effect between video and subtitles
Solution Approach 1:
The patent makes the subtitle plane offset dynamic by adjusting it according to the scaling ratio. When scaling is applied to the video, the subtitle plane offset is automatically adjusted to maintain consistent stereoscopic depth relationships. This resolves the contradiction by making the subtitle positioning adaptive to scaling operations while preserving the intended stereoscopic effect.
Solution Approach 2:
The patent changes the parameter of subtitle plane offset based on the scaling ratio. By multiplying the original plane offset by the scaling ratio, the subtitle depth is adjusted proportionally to the video scaling, ensuring that the stereoscopic relationship between subtitles and video remains consistent after scaling operations.
2Stability of the object's composition
If a large plane offset is used for subtitles to create depth effect, then the stereoscopic effect is enhanced, but during scaling the subtitle position shifts excessively relative to the video plane
Solution Approach 1:
The patent dynamically adjusts the plane offset parameter based on the scaling ratio. When scaling down, the plane offset is reduced proportionally to prevent excessive subtitle position shifts. When scaling up, the plane offset is increased to maintain the intended depth effect. This resolves the contradiction by making the plane offset adaptive to scaling operations.
Solution Approach 2:
The patent applies a compensatory adjustment to the plane offset before subtitle rendering after scaling. By calculating the appropriate offset adjustment based on the scaling ratio and applying it in advance, the system prevents the excessive position shift from occurring, thereby maintaining both depth effect and position accuracy.
Data Source
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AI summary
In performing stereoscopic view, a shift information memory (21) stores, as a number of pixel lengths, an offset indicating how far in a right direction or a left direction to move coordinates of pixels to realize stereoscopic view. When realizing stereoscopic view, a plane shift engine (20) moves the coordinates of image data in a graphics plane in the right direction or the left direction by the number of pixel lengths indicated by the offset. When a scale of video data targeted for stereoscopic view is changed by a basic graphics plane (15), a shift distance of pixel coordinates by the plane shift engine (20) is based on a number of pixel lengths obtained by multiplying the offset by a changed scaling factor in the horizontal direction.