VLC Pixel Modulation for Interference Reduction
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Solution Overview
Problem
Existing visual communication displays, such as AMOLEDs, face limitations in transmitting dynamic augmented data due to high RGB pixel density, limited communication distance, interference with neighboring pixels, and flickering issues, which hinder the effective transmission of critical information using visible light communication.
Innovation Solution
A method and electronic device that selectively modify Blue Chrominance (Cb) or Red Chrominance (Cr) components of pixels in multimedia data to augment and transmit additional data via visible light communication, using optical zoom and metadata extraction to ensure accurate data capture and minimize interference, allowing for dynamic data transmission and improved data reading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high RGB pixel density is used in AMOLED displays, then display quality and color accuracy are improved, but interference with neighboring pixels increases and communication distance is limited
Solution Approach 1:
The patent segments the pixel data into different sets based on spatial distribution and interference characteristics. It identifies first set of pixels with lower inter-pixel distance and second set of pixels with higher inter-pixel distance, then processes them differently - applying stronger modulation to less interfered pixels and weaker modulation to more interfered pixels, thereby resolving the contradiction between high pixel density and inter-pixel interference
Solution Approach 2:
The patent applies local quality by differentiating the modulation strategy based on the specific location and interference level of each pixel set. Instead of uniform processing, it tailors the modulation factor and processing approach to the local characteristics of different pixel regions, allowing high pixel density to be maintained while managing inter-pixel interference through localized optimization
2Speed
If visible light communication data is transmitted at high frequency, then data transmission speed is improved, but flickering effect becomes noticeable to human eyes
Solution Approach 1:
The patent employs periodic action by modulating the visible light communication signal at a frequency that is imperceptible to human eyes while maintaining efficient data transmission. The system uses frame-based modulation with carefully controlled frequency to achieve high data transmission speed without creating noticeable flickering effects, as the modulation occurs at frequencies below human visual perception thresholds
3Quantity of substance
If auxiliary data is added to multimedia data for augmentation, then information content is improved, but data complexity and processing requirements increase
Solution Approach 1:
The patent applies the nested doll principle by embedding auxiliary data within the existing multimedia data structure in a hierarchical manner. The auxiliary data is integrated into the pixel modulation scheme without requiring complete redesign of the data structure, allowing additional information content to be added while managing processing complexity through structured integration rather than flat addition
4Adaptability or versatility
If critical information is transmitted via visible light, then communication capability is improved, but data loss occurs during reading by image sensor
Solution Approach 1:
The patent applies preliminary action by pre-processing the pixel data to identify and protect critical information before transmission. It pre-determines which pixels contain critical data and applies enhanced modulation and error protection to those specific pixels, ensuring that when the image sensor reads the data, the critical information is preserved and can be accurately recovered, thereby reducing data loss
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient transmission of augmented data over visible light communication with reduced interference and improved readability, enhancing the ability to convey dynamic information over longer distances without causing flickering or losing critical data.
Implementation Method 1
A visible light communication (VLC) is a data communication technique which uses the visible light with a frequency spectrum between 400 and 800 Terahertz (THz) for transmission of the data
Implementation Method 2
The receiver is the electronic device that captures the visible light information using an image sensor, decodes the visible light information to the video stream
Data Source
AI summary
A method of visual content communication includes: receiving, multimedia data from a multimedia source; identifying, a first set of pixels from among a plurality of pixels of the multimedia data in a YCbCr color space based on information in the plurality of pixels; selecting, a second set of pixels from among the first set of pixels based on a luminance value and an inter-pixel distance of each pixel of the first set of pixels; generating, metadata for the second set of pixels based on an auxiliary content, wherein the auxiliary content is to be added in the multimedia data; modifying, at least one of a Cb component or a Cr component of the second set of pixels using a modification factor based on the metadata; and transmitting, to an electronic device, the multimedia data in an RGB color space with the modified second set of pixels using visible light communication.