Abstract: A fiber system for realizing digitized video transmission by two encoding methods is introduced in this paper. The circuit encoding, data serialized methods and construction in the fiber transmission system are briefly described. The multiplex/demultiplex of parallel data and their different encoding function were realized by choosing a serializer/deserializer circuit with parallel input. The advantages and defects of these data encodings are described. The superiority of the two encoding methods compared to the traditional encoding methods, and the effect of the different encoding methods on the receiving characteristics of the system are given. A schematic diagram of the signal connection and the encoding table for each encoding method are presented. The function and the applied fields of the system with four-layer PCB are provided.