Visual Secret Sharing Based RGB Parallel Transmission System

In the illumination-light communications using the intensity modulation/direct detection method, transmitted data cannot be correctly decoded in the area where adjacent illumination-light interferes. To solve this problem, the illumination-light communications using the Visual Secret Sharing (VSS) scheme have been proposed to utilize the overlapped signal in the area where the illumination-light overlaps. In this paper, for RGB parallel transmission illumination-light communications, a system that utilizes the VSS scheme and adjacent light interference is proposed. In the proposed system, R, G, and B emissions by VSS signal are controlled by Modified Pseudo Orthogonal M-sequence (MPOM) to maintain the illumination function of RGB-LEDs. The pixel error rate of the proposed system is evaluated by computer simulation. Consequently, it is found that data can be received even in the interference areas. It has also been shown to maintain uniformity of illumination-light.