Optical Downlink via Display Entropy Segmentation
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Solution Overview
Problem
Conventional optical communication systems using display devices for data transmission face limitations in achieving high-speed communication due to low spatial resolution and insufficient throughput, as they encode data in regions with significant information entropy, restricting data transmission to small volumes like URLs.
Innovation Solution
The system identifies regions within videos displayed on normal display panels with minimal brightness and color changes, encodes transmission data into these regions as optical communication signals, and decodes them using specialized terminals, enhancing communication throughput by utilizing existing display devices without advanced technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is encoded in regions with significant information entropy (conventional method), then the communication system can transmit data, but the spatial resolution is low and throughput is insufficient, restricting data transmission to small volumes
Solution Approach 1:
The patent divides the display screen into multiple regions with different information entropy characteristics. By segmenting the communication signal into multiple lower-order signals distributed across different regions, the system achieves higher overall throughput while maintaining adequate spatial resolution in each region. This is accomplished by identifying regions with minimal brightness and color changes and encoding transmission data specifically into these low-entropy regions.
Solution Approach 2:
The patent applies different encoding strategies to different regions of the display screen based on their local information entropy characteristics. Regions with minimal brightness and color changes (low information entropy) are selected for data encoding, while other regions maintain their normal visual quality. This local differentiation allows the system to achieve high throughput in selected regions without degrading the overall visual quality of the display.
2Ease of manufacture
If normal display panels are used without advanced technologies, then existing devices can be utilized without expensive equipment, but conventional optical communication systems face limitations in achieving high-speed communication
Solution Approach 1:
The patent changes the parameter of information entropy distribution across the display screen by utilizing regions with minimal brightness and color changes. This parameter change allows normal display panels to achieve higher communication rates without requiring advanced display technologies or expensive equipment. The system transforms the limitation of conventional displays into an advantage by exploiting the natural variation in information entropy across different screen regions.
Solution Approach 2:
The patent uses the existing display panel structure and pixel arrangement as a template for encoding communication signals. By copying the natural pixel distribution and utilizing the existing hardware architecture, the system achieves high-speed communication without requiring new specialized devices. The method leverages the inherent properties of normal display panels rather than demanding new technology development.
3Productivity
If transmission data is encoded into displayed images using conventional methods, then optical downstream communication is achieved, but the communication rate is limited and cannot exceed gigabits without developing new devices
Solution Approach 1:
The patent introduces a new dimension for data encoding by utilizing the information entropy characteristics of different spatial regions on the display screen. Instead of uniformly encoding data across the entire screen, the system exploits the dimensional variation in information entropy across different pixel regions. This dimensional approach allows the system to achieve gigabit communication rates using existing display hardware without requiring new device development.
Data Source
AI summary
In accordance with increasing communication demand, means for efficiently providing mass downstream communication at a low cost are desired. Accordingly, a communication system providing supplemental downlink as well as multicast communication comprising a display control device for causing a display unit to display a video, and a communication terminal having an image capturing unit for directly capturing the video displayed by the display unit or capturing a video projected or reflected on a wall surface or the like is provided, wherein the display control device includes a video acquiring unit, a region identification unit, a video generating unit, and a display control unit, and the communication terminal includes a region identification unit, a decoding unit, and a mechanism for communicating a control signal for supplemental downlink by the above-described optical communication using means other than optical communication (means such as WiFi, mobile data communication or the like).