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在研究了SDI串行数字接口工作原理的基础上,提出了一种新型的高清晰度/标准清晰度数字电视信号采集传输用的SDI卡,阐述了SDI卡中的DVI输入接口、均衡电路、串并转换电路、并串转换电路、输出驱动电路和可编程时钟电路的设计,在硬件设计基础上介绍了FPGA中IP核设计和上位机程序设计方法和流程,并总结了开发调试中需要注意的问题.高清晰度数字视频SDI卡通过实际测试,实现了DVI、HD和SD信号的输入处理和输出转换,验证了设计方案的效果.
Based on the study of the working principle of SDI serial digital interface, a new SDI card for high definition / standard definition digital TV signal acquisition and transmission is proposed. The DVI input interface, equalization circuit, Serial and parallel conversion circuit, parallel-serial conversion circuit, output driver circuit and programmable clock circuit design, based on the hardware design introduced in the FPGA IP core design and host computer programming methods and processes, and summed up the development and commissioning needs attention The problem of high definition digital video SDI card through the actual test, the realization of the DVI, HD and SD signal input processing and output conversion, verify the effect of the design.