【摘要】 激光通信的视频采集需要嵌入式标准化接口的实时数字采集,采取FPGA+SAA7111A的架构来实现系统的实时化、小型化、标准化和模块化。FPGA作为控制器,经I2C总线对视频解码芯片SAA7111A进行初始化。设计了两个读写互斥的存贮单元,分别用来存贮所采集的奇场和偶场数据,并专门设计了一个用于和图像处理单元通信的标准握手接口;为减小传送数据流量,对采集后的图像进行了提取和预处理。通过反复试验仿真,基于FPGA的整个图像采集方案可行,能够在图像采集处理系统中得以应用。更多还原

【Abstract】 It is needed flush type standardized interface in laser communication to real-time digital video capture.It makes the system real-time and miniaturization and standardization and modularization by using the structure of FPGA+SAA7111A.FPGA as controller initialize video decode chip SAA7111A through I2C bus.Two memory cells which mutex to each other for the storing of odd field and even field data separately has been designed.And it also designs a standardized interface to image processing.Besides,in order to minimize the data flux,it extracts the image and preprocesses the image.Though the repeated test simulation,it is proved the entire picture gathering plan is feasible,can be able to apply in the picture gathering processing system.更多还原