基于FPGA的SDI接口的设计与实现.pdf

24 3 Vol. 24 No. 3 2008 6 JOU NAL OF TIANJIN UNIVE SITY OF TECHNOLOGY Jun. 2008 : 1673095X( 2008) FPGA SDI 1 1 2 杨 帆 , 张宝峰, 佘单兵 ( 1. , 300191; 2. , 300280) : 串行数字接口( Serial d igital 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 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 F GA 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. : ( SDI); (F GA ); ; NRZI : T 334. 7 : A Design and implementation of SDI based on FPGA 1 1 2 YANG Fan , ZHANG Baofeng , SHE Danbing ( 1. School of Electrical Engineering, T ianjin University of Technology, T ianjin 300191, Ch ina; 2. Da Gang O ilfield Drilling and roduction Technology Institute, T ianjin 300280, Ch ina) Abstract: Serial Digital Interface ( SDI) is them ost extensive video interface, w hich transm its uncom pressed digital aud io or video signals serially w ith a coaxial cable. The form er m ethods to mi p lement the SD I cause m uch costs and low agility. In view of these problem s, th is paper uses a F GAbasedw ay to design the SDI. H ere, it m ainly expounds the schem e of the SD SDI design, and analyses its structures and functions of each m odule. A fter some prmi ary functional modu les program m ing, a smi ulation m odel hasbeen set up for a particular data inpu t. The system smi u lation resu ltvalidates the correctnessof data recovering in the case of particu lar data inputs, furthermore, it shows the schem es feasibility and valid ity in the case of