3D Display Signal Frame Type Synchronization Indicators
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Solution Overview
Problem
Current 3D display systems lack absolute synchronization of left and right video frames, leading to potential image swapping issues that can cause eye strain and nausea in naive users, hindering the adoption of 3D technology for consumer use.
Innovation Solution
Incorporating a frame type synchronization indicator in the 3D display signal to ensure absolute synchronization of partial 3D data structures, allowing the 3D display device to generate display control signals based on the synchronization indicator, thereby preventing image swapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relative synchronization based on traditional interlaced video signals is used, then device complexity is reduced, but reliability deteriorates due to image swapping issues causing eye strain and nausea
Solution Approach 1:
The patent applies preliminary action by embedding frame type identification information (such as VPS headers or metadata) into the video signal in advance at the source device. This allows the display device to proactively identify and correctly process left and right eye images before they are displayed, preventing image swapping without requiring complex real-time analysis. The synchronization information is prepared beforehand, ensuring reliable 3D display while maintaining relatively simple device architecture.
2Object-affected harmful factors
If traditional interlaced video signal processing is used, then ease of operation is maintained, but harmful factors increase due to eye strain and nausea from image swapping
Solution Approach 1:
The patent implements self-service by enabling the display device to automatically detect and process frame type information from the embedded metadata or VPS headers. The system autonomously identifies left and right eye images and configures the display without requiring manual user intervention. This eliminates image swapping and associated harmful effects while maintaining ease of operation, as users simply need to connect the devices without additional setup steps.
3Reliability
If frame type synchronization indicators are embedded in the 3D display signal, then reliability is improved through absolute synchronization, but device complexity increases at the source device
Solution Approach 1:
The source device embeds frame type identification information (VPS headers, metadata) into the video signal in advance during the encoding or preprocessing stage. This preliminary action ensures that synchronization information is available throughout the transmission chain, enabling reliable frame synchronization at the display device without requiring complex real-time processing at the source. The complexity is shifted to the encoding stage, which is a one-time operation, rather than continuous complex processing.
Solution Approach 2:
The patent uses metadata or VPS (Video Parameter Set) headers as an intermediary carrier to convey frame type synchronization information. These standardized data structures act as mediators between the source device and display device, enabling reliable communication of synchronization information without requiring direct complex interaction between the devices. This intermediary approach maintains reliability while managing complexity through established protocols.
Data Source
AI summary
A system of transferring of three dimensional (3D) image data is described. A 3D source device (10) provides 3D display signal (56) for a display (13) via a high speed digital interface like HDMI. The 3D display signal has frames constituting the 3D image data according to a 3D video transfer format, in which format the frames comprise at least two different frame types. Each frame has a data structure for representing a sequence of digital image pixel data, and represents a partial 3D data structure. The 3D source device includes frame type synchronization indicators in the 3D display signal. The display detects the frame type synchronization indicators and frame types, and generates the display control signals based on synchronizing the partial 3D data structures in dependence of the frame type synchronization indicators.