Aimed at camera with SDI interface output, a video interface conversion system that transforms SDI input into Camera Link output is designed and implemented, and Xilinx Corporation' s Spartan-3E XC3S250E is used as the main control chip. The cable equalizing, data retiming and video decoding circuit of SDI signal, and the data stream de-interweave, storage, color space conversion and the Camera Link timing generator module of FPGA are introduced in detail. Combined with actual application, the SDI video signal output from camera can be input into the frame grabber with the Camera Link interface by this system, which makes video displaying and processing more conveniently.%针对具有SDI接口输出的相机,采用Xilinx公司Spartan-3E系列的XC3S250E作为主控制芯片,设计并实现了由SDI输入到Camera Link输出的视频接口转换系统.详细介绍了SDI信号的电缆均衡、重新定时锁相、解码电路以及FPGA的数据流解交织、存储、彩色空间变换和Camera Link时序发生模块等.该系统结合实际应用,可使相机输出的SDI视频信号经转换后输入到具有Camera Link接口的图像采集卡上,便于图像的显示和处理.
展开▼
