Multi-Display Video Synchronization Hardware Architecture
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Solution Overview
Problem
Synchronizing video content across multiple displays in video walls with high precision is challenging, especially in large configurations, leading to potential distortion and a negative user experience due to latency issues.
Innovation Solution
A hardware architecture that includes video synchronization devices with display interfaces and controllers, utilizing internal and external synchronization circuitry to synchronize clock and frame rates across multiple displays, allowing for precise synchronization through clock and frame synchronization signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If video content is displayed across multiple displays without hardware-based synchronization, then device complexity is reduced, but video synchronization precision deteriorates leading to distortion and latency issues
Solution Approach 1:
The patent introduces a dedicated synchronization device as an intermediary component that receives video content and distributes synchronized video frames to multiple display devices. This mediator handles the complex timing and coordination tasks, isolating the complexity from the display devices themselves while achieving precise synchronization across the entire video wall system.
Solution Approach 2:
The patent replaces software-based or manual synchronization methods with a hardware-based synchronization system that uses dedicated synchronization circuits and signals. This hardware approach provides more reliable and precise timing control compared to software implementations, achieving the required synchronization precision through electrical signal distribution.
2Reliability
If video content is synchronized across numerous displays with high precision, then user experience is improved, but device complexity and difficulty of implementation increase
Solution Approach 1:
The patent divides the video wall system into distinct functional segments: a synchronization device that handles timing and coordination, display controllers that manage individual displays, and display devices that show video content. This segmentation allows each component to be optimized independently while working together as a unified system, improving reliability without requiring the entire system to be overly complex.
Solution Approach 2:
The synchronization device serves multiple functions simultaneously: it acts as a video content distributor, a timing signal generator, a frame synchronization controller, and a coordination hub for multiple display controllers. By consolidating these functions into a single multi-functional device, the system achieves high reliability without proportionally increasing overall system complexity.
3Measurement precision
If latency is reduced to achieve precise synchronization, then video distortion is minimized, but loss of time for signal processing increases
Solution Approach 1:
The synchronization device maintains continuous operation by pre-processing and buffering video frames, ensuring that synchronization signals and video content are always ready for immediate distribution. This continuous operation eliminates gaps and delays in the synchronization process, achieving precise synchronization without significant time loss during actual video playback.
Solution Approach 2:
The system performs preliminary actions by pre-synchronizing timing signals and preparing video frames before actual display output. The synchronization device advances the timing coordination and frame preparation in advance, so that when video content needs to be displayed, everything is already synchronized and ready, minimizing real-time processing delays while maintaining high synchronization accuracy.
Data Source
AI summary
In one embodiment, a processing device includes a plurality of display interfaces, a plurality of display controllers, and display synchronization circuitry. The display interfaces are used to interface with a plurality of display devices, and the display controllers are used to output video frames to the display devices via the display interfaces. Moreover, the display synchronization circuitry includes a clock synchronization interface and a frame synchronization interface. The clock synchronization interface is used to synchronize a clock rate across the display controllers, while the frame synchronization interface is used to synchronize a frame rate across the display controllers.