基于FPGA的SDI接口的设计与实现

串行数字接口(Serial digital interface,SDI)是目前应用最广泛的视频接口,使用单根同轴电缆串行传输未经压缩的数字视音频信号.鉴于以往的SDI接口实现方法有成本高、灵活性低这些缺点,本文采用了一种基于FPGA的SDI接口设计与实现方法.主要阐述了SD SDI接口的设计思想,分析了接口的总体结构,并具体介绍了各个模块的功能.完成了部分主要功能模块的程序设计,并针对一种特殊数据输入情况,对编码解码模块建立仿真模型.仿真结果验证了特殊情况下数据恢复的正确性,进一步表明了一般数据输入时整体设计方案的正确性和可行性.

Design and implementation of SDI based on FPGA

Serial Digital Interface(SDI) is the most extensive video interface,which transmits uncompressed digital audio or video signals serially with a coaxial cable.The former methods to implement the SDI cause much costs and low agility.In view of these problems,this paper uses a FPGA-based way to design the SDI.Here,it mainly expounds the scheme of the SD SDI design,and analyses its structures and functions of each module.After some primary functional modules' programming,a simulation model has been set up for a particular data input.The system simulation result validates the correctness of data recovering in the case of particular data inputs,further more,it shows the scheme's feasibility and validity in the case of normal data inputs.