Secondary-stream data transmission for conference systems
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Solution Overview
Problem
Current wireless display technologies for video conferences lack compatibility across different systems and devices, leading to inefficient connections and poor user experience due to hardware and system-specific requirements, as well as high CPU usage for image compression and limited support for extended display modes.
Innovation Solution
A secondary-stream transmission method using a USB peripheral device with a built-in wireless transmission module and a USB virtual display driver that compresses image data using the graphics card, allowing for cross-platform compatibility and reduced CPU usage, enabling wireless transmission of compressed data through a unified interface and supporting both duplication and extension display modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless display technologies (WiDi, Airplay, Miracast) are used for video conference transmission, then wireless transmission capability is achieved, but compatibility across different systems and devices is poor due to hardware and system-specific requirements
Solution Approach 1:
The patent implements a universal wireless display solution that works across multiple operating systems (Windows, macOS, Linux) and device types (laptops, desktops, tablets, smartphones) through a standardized protocol. The system provides unified wireless transmission functionality that adapts to different hardware configurations without requiring system-specific drivers or software, thereby resolving the compatibility issue while maintaining ease of wireless operation.
2Quantity of substance
If image data is compressed using CPU-based software processing, then transmission data volume is reduced, but CPU usage increases significantly affecting system performance
Solution Approach 1:
The patent replaces CPU-based software compression with GPU-based hardware acceleration. The graphics card's dedicated compression hardware processes image data much faster and with lower CPU involvement than software-based compression. This substitution maintains reduced transmission data volume while dramatically lowering CPU usage, allowing the system to achieve both efficient data compression and preserved system performance.
3Reliability
If wired video transmission through display output interfaces is used, then stable audio and video transmission is achieved, but deployment complexity increases due to multiple connecting lines and interface compatibility requirements
Solution Approach 1:
The patent replaces physical wired connections with wireless transmission technology. Instead of requiring multiple cables and physical interface connections for audio and video transmission, the system uses wireless signals to transmit the same data. This eliminates the mechanical complexity of cable management and interface compatibility while maintaining transmission stability through robust wireless communication protocols.
4Measurement precision
If content is transmitted through dedicated wireless networks with non-compressed images, then image fidelity is high, but transmission data volume becomes large requiring specialized infrastructure
Solution Approach 1:
The patent dynamically adjusts compression parameters to balance image fidelity and transmission data volume. Instead of using fixed non-compressed transmission, the system applies adaptive compression that maintains sufficient image quality for conference purposes while significantly reducing data volume. The compression level can be adjusted based on network conditions and display requirements, allowing optimal balance between quality and efficiency.
Data Source
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AI summary
The present disclosure provides a secondary-stream data transmission method for use in a conference. An electronic device is communicatively connected to a peripheral device, and a virtual display apparatus and a virtual UAC device are virtualized on the electronic device. The virtual UAC device is configured to establish an audio data channel between the electronic device and the peripheral device, to obtain audio data. Image data is obtained from an output interface of a graphics card of the electronic device. If the image data needs to be transmitted to the virtual display apparatus, the image data, or the image data and the audio data are transmitted to the peripheral device, and are transmitted to the outside by the peripheral device. The present disclosure can not only implement compatibility of cross-platform operating systems, but also support different display modes such as duplication and extension. Encoding is accelerated by using hardware of the graphics card, so that CPU usage is reduced greatly.