3D Caption Display Method for Stereoscopic Television
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Solution Overview
Problem
Current closed caption broadcasting standards are not compatible with stereoscopic 3D television, leading to inefficient use of bandwidth and incomplete caption display, which can confuse viewers and cause discomfort.
Innovation Solution
A 3D caption display method that determines the position of closed captions for extended views based on 3D caption information, allowing for harmonious merging and display of captions with 3D images, using a 3D display apparatus that receives image signals for both eyes and formats caption graphic data to output 3D closed captions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If closed caption data is transmitted using traditional 2D broadcast standards, then caption display is achieved, but bandwidth efficiency deteriorates and 3D viewing experience deteriorates
Solution Approach 1:
The patent applies dimensionality change by transitioning from traditional 2D caption display to 3D caption display. The system determines 3D caption information including depth position and horizontal disparity, then generates separate caption graphics for base view and extended view based on stereoscopic image pairs. This allows captions to be displayed in the third dimension (depth) while maintaining compatibility with existing 2D broadcast standards through the base view caption data transmission mechanism.
2Loss of information
If closed captions are displayed on 3D television screens, then caption visibility is improved, but viewer comfort deteriorates due to confusion and discomfort
Solution Approach 1:
The patent applies local quality by differentiating the display parameters for base view and extended view captions. The system determines distinct depth positions and horizontal disparities for captions in each view, ensuring that caption graphics are positioned appropriately for each eye's perspective. This localized optimization of caption positioning prevents viewer discomfort by avoiding conflicting or overlapping caption displays that would occur with uniform 2D positioning.
Solution Approach 2:
The patent segments the caption display into separate components for base view and extended view. By processing caption data independently for each view and generating separate caption graphics with view-specific 3D parameters, the system avoids confusion that would arise from attempting to display unified captions across both views simultaneously.
3Loss of information
If 3D caption information is transmitted for both base view and extended view, then caption display completeness is improved, but bandwidth consumption increases
Solution Approach 1:
The patent applies preliminary action by transmitting 3D caption information only for the base view in advance, then using this base view information to generate the extended view caption graphics. The receiver determines extended view caption parameters (depth position, horizontal disparity) based on the transmitted base view 3D caption information and the corresponding stereoscopic image pairs, eliminating the need to transmit redundant 3D caption data for both views separately.
Data Source
AI summary
A 3D caption display method for harmoniously merging and displaying closed caption with 3D image in a 3D display apparatus, and a 3D display apparatus suitable for implementing the method. The 3D display apparatus receives a broadcast signal containing caption data, and obtains caption control commands including a 3D parameter setting command from the caption data. Afterwards, the 3D display apparatus displays a plurality of 3D caption images according to the caption control commands.