Adaptive Bandwidth Video Transmission for Multiple 4K Displays
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Solution Overview
Problem
Existing video transmission systems cannot simultaneously transmit video signals to multiple 4K display devices due to bandwidth limitations, particularly when using DisplayPort (DP) interfaces, resulting in poor user experience with 4K ultra high definition on connected devices.
Innovation Solution
A method and system for adaptive bandwidth adjustment, where the conversion device obtains and modifies display timing settings to reduce bandwidth requirements, allowing simultaneous transmission of 4K video signals to multiple display devices by generating a second display timing parameter with lower bandwidth and converting it back to the original setting for proper display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the conversion device transmits video data to multiple 4K display devices simultaneously, then the user experience with 4K ultra high definition is improved, but the bandwidth requirement exceeds the maximum bandwidth that can be borne by the DisplayPort interface
Solution Approach 1:
The patent applies parameter changes by modifying display timing settings (horizontal blanking pixels, vertical blanking lines, frame rate) to adjust the bandwidth consumption of video signals. By dynamically changing these parameters, the system can reduce the bandwidth requirement from exceeding DP interface limits to within acceptable ranges, enabling simultaneous transmission to multiple 4K display devices while maintaining 4K resolution quality.
2Adaptability or versatility
If the conversion device transmits USB 3.0 signal and video signal simultaneously, then the signal transmission capability is improved, but the video signal bandwidth is reduced below 4K quality requirements
Solution Approach 1:
The patent applies dynamics by making the display timing parameters adjustable and changeable based on transmission conditions. The system can dynamically switch between different timing settings (first timing information for full 4K quality, second timing information for reduced bandwidth) depending on whether USB 3.0 signal transmission is required, allowing flexible adaptation to different usage scenarios while maintaining both USB 3.0 and video signal transmission capabilities.
3Adaptability or versatility
If the video source transmits video signal with reduced bandwidth, then the bandwidth compatibility is improved, but the display quality on 4K ultra high definition devices deteriorates
Solution Approach 1:
The patent applies the intermediary principle by introducing a conversion device that acts as a mediator between the video source and display devices. The conversion device receives video signals with adjusted timing parameters, processes and converts them back to original timing information, and then outputs to display devices. This intermediary processing ensures that bandwidth-compatible transmission is achieved while maintaining 4K display quality at the output.
Data Source
AI summary
A video transmission method and a system thereof are provided. The video transmission method includes: obtaining a first display timing setting parameter of one or more display devices. A total transmission bandwidth of the display device is calculated according to the first display timing setting parameter, and when the total transmission bandwidth is greater than a maximum transmission bandwidth between a video source and a conversion device, a second display timing setting parameter with a lower bandwidth is generated corresponding to the first display timing setting parameter. The video source transmits a video signal conforming to the second display timing setting parameter to the conversion device. The conversion device converts the second display timing setting parameter of the video signal back to the first display timing setting parameter. The video signal conforming to the first display timing setting parameter is transmitted to the corresponding display device.