Experimental Research on Image Transmission with High Compressive Rate in a Semantic Visible Light Communication System

In this paper, we introduce an image compression technique for semantic communication to optimize the bandwidth constraint in visible light communication (VLC) systems and improve the ease of deployment of the system owing to the high tolerance and fidelity of semantic communication systems. The generalized communication rate was boosted to 400 Mbps by transmitting 400-Mb-sized random images through a physical visible light channel with a single blue LED and the orthogonal frequency-division multiplexing format using 16 quadrature amplitude modulation-orthogonal frequency-division multiplexing at a communication rate of 50 Mbps in an indoor space of 3 m. The proposed semantic VLC (S-VLC) system remained stable and exhibited high efficiency at a bit error rate (BER) of 3 ×10
^-6
. Furthermore, the S- VLC system showed high robustness compared with other systems (JPEG and JPEG2000) at different distances and higher BERs. The structural similarity index measure of the S- VLC system is superior to those of JPEG and JPEG2000.