3D Caption Signal Transmission Method and Display
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Solution Overview
Problem
In stereoscopic 3D television systems, displaying closed captions in a manner that is aesthetically harmonious with 3D images while minimizing the calculation burden on the receiver is challenging, as applying indiscriminate 3D attributes to caption text can degrade the aesthetic sense and increase the rendering burden.
Innovation Solution
A method is proposed where a 2D caption window is extended into a 3D caption text box, with defined parameters for the 3D caption text box, text box style, and text style, allowing for the generation and transmission of 3D caption box configuration information and caption text within a video picture header, enabling 3D caption display within a 3D image without excessive calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If 3D attributes are applied to caption text to make it harmonious with 3D images, then the aesthetic quality is improved, but the calculation burden on the receiver increases
Solution Approach 1:
The patent applies preliminary action by pre-defining a limited set of 3D caption styles and attributes at the transmitter side. These styles are encoded and transmitted along with the caption data, so the receiver only needs to perform simple style application rather than complex real-time 3D rendering calculations.
Solution Approach 2:
The patent changes parameters by representing 3D caption attributes as discrete, parameterized style definitions rather than continuous geometric transformations. This allows the receiver to apply pre-defined style parameters directly to caption text without performing complex 3D rendering calculations.
2Device complexity
If 3D caption styles are pre-defined and transmitted to reduce calculation burden, then the device complexity is reduced, but the adaptability of caption display decreases
Solution Approach 1:
The patent applies universality by designing a set of parametric 3D caption styles that can be adapted to different caption contents and scenarios. The style parameters can be selectively applied based on the type of caption text, making the system versatile while maintaining simplicity in implementation.
Solution Approach 2:
The patent uses parameter changes to maintain adaptability within a simplified framework. By defining styles with adjustable parameters (such as text box position, size, color, and 3D transformation parameters), the system can adapt to different display needs without requiring complex custom rendering at the receiver side.
3Manufacturing precision
If caption data is transmitted with detailed 3D rendering information, then the aesthetic quality is improved, but the loss of information increases due to larger data transmission requirements
Solution Approach 1:
The patent applies copying by transmitting lightweight style definition data that references pre-defined 3D rendering characteristics. Instead of transmitting full 3D model data or complex rendering instructions, the system transmits compact style identifiers and parameters that refer to standardized rendering templates, significantly reducing data transmission requirements while maintaining rendering quality.
4Adaptability or versatility
If a 2D caption window is extended into a 3D caption text box, then the adaptability of caption display is improved, but the device complexity increases due to additional parameter management
Solution Approach 1:
The patent applies preliminary action by pre-defining the structure and parameters of 3D caption text boxes at the transmitter side. The text box geometry, positioning, and transformation properties are established in advance and encoded as style definitions, eliminating the need for the receiver to perform complex parameter management during runtime.
Data Source
AI summary
A method for transmitting a three-dimensional (3D) caption signal and caption display method are disclosed to three-dimensionally display caption text such that it fits a 3D image in a 3D display device. 3D caption box configuration information and caption text are generated to display a 3D caption within a 3D image, and the 3D caption box configuration information and the caption text are inserted into a video picture header region to code the image signal, and then, the image signal is transmitted. In the caption display method, a broadcast signal including a 3D image signal is received, and 3D caption box configuration information and caption text included in the broadcast signal are acquired. A caption image including 3D caption text disposed within a 3D caption box is then generated based on the 3D caption box configuration information and the caption text, and displayed.