Experimental Assessment of 1D-DCT Based Display Field Communication Scheme

Display Field Communication (DFC) is a spectral domain-based display-to-camera (D2C) communication, where a display and a camera function as a transmitter and a receiver, respectively. In this paper, we will provide an outline of the DFC scheme proposed in [1]. First of all, we applied the one-dimensional Discrete Cosine Transform (DCT) to convert a spatial-domain image to its spectral-domain counterpart. By adapting addition-based data allocation and subtraction-based data retrieval, we were able to achieve computationally efficient and even robust data transmission ability. In addition, we proposed a new power allocation scheme and turbo channel coding scheme during the data embedding process to optimize both image quality and data transmission capability. For practical experiment, a deep learning approach-based object detection scheme, called YOLOv4, is adopted to extract the region from the acquired image. From real-world experiments, we were able to prove the feasibility of our proposed 1D-DCT based DFC scheme [1].