3D Video Signal Transfer via Info Frame Metadata
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Solution Overview
Problem
Current methods for transferring 3D video signals lack flexibility and reliability, particularly in handling various 3D data formats and high data volumes, often requiring significant bandwidth and compromising on resolution or color to transmit stereo information.
Innovation Solution
A 3D video transfer method using a 3D video format with a video data period and a data island period, where packets include an info frame packet containing 3D transfer information, such as the multiplexing scheme and number of frames, allowing for flexible formatting and transmission of 3D image data over high-speed interfaces like HDMI, enabling efficient rendering of 3D images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional 2D video signal formats are used to transmit 3D video data, then bandwidth requirements are reduced, but resolution and color quality are compromised
Solution Approach 1:
The patent segments 3D video data into multiple frame types (first frame type with left-eye view, second frame type with right-eye view, third frame type with depth information) and transmits them separately through the video signal. This segmentation allows efficient packing of 3D data while maintaining full resolution and color quality, resolving the contradiction between bandwidth efficiency and image quality.
2Manufacturing precision
If 3D video data is transmitted with full resolution and color, then image quality is maintained, but bandwidth requirements increase significantly
Solution Approach 1:
The patent dynamically adjusts the transmission format by using different frame types for different purposes: full-color frames for visual information and depth frames for 3D structure. This dynamic approach allows the system to maintain high image quality where needed while reducing bandwidth consumption by transmitting depth information in grayscale, effectively resolving the bandwidth-quality tradeoff.
3Adaptability or versatility
If multiple 3D data formats are supported, then system versatility is improved, but system complexity increases
Solution Approach 1:
The patent creates a universal 3D video signal format that can be displayed on various 3D display types (shutter glasses, polarized, autostereoscopic) without requiring format conversion. The display device receives the multi-frame-type signal and automatically processes it according to its capabilities, providing universal compatibility while keeping the source device relatively simple.
4Reliability
If 3D transfer information is embedded in each frame, then transmission reliability is improved, but data volume and processing complexity increase
Solution Approach 1:
The patent applies local quality by embedding 3D transfer information selectively - only the necessary synchronization and format information is included in each frame's metadata, not the entire frame data. This localized approach ensures accurate synchronization and reliable transmission while minimizing the additional data volume and processing requirements.
Data Source
AI summary
A three-dimensional source device provides a three-dimensional display signal for a display via a high speed digital interface, such as HDMI. The three-dimensional display signal comprises a sequence of frames. The sequence of frames comprises units, each unit corresponding to frames comprising video information intended to be composited and displayed as a three-dimensional image. The three-dimensional source device includes three-dimensional transfer information comprising at least information about the video frames in the unit. The display detects the three-dimensional transfer information, and generates the display control signals based in dependence on the three-dimensional transfer information. The three-dimensional transfer information in an additional info frame packet comprises information about the multiplexing scheme for multiplexing frames into the three-dimensional display signal, the multiplexing scheme being selected of group of multiplexing schemes including frame alternating multiplexing, the three-dimensional transfer information indicating the number of frames being sequentially arranged within the video data period.