数字PAL视频展台中的关键技术  

A Research on the Pivotal Technologies in Digital PAL-Video Presenter

作　　者：杨慧贞[1] 程永强[2] 

机构地区：[1]太原理工大学继续教育学院,山西太原030024 [2]太原理工大学信息工程学院,山西太原030024

出　　处：《中北大学学报（自然科学版）》2006年第6期537-540,共4页Journal of North University of China(Natural Science Edition)

基　　金：山西省自然科学基金资助项目(20051019)

摘　　要：以X ilinx Spartan-3E XC 3S250E为文档摄像机,采用两个SDRAM作为帧缓存,将帧率提升到60帧/s,并对图像进行放大.完成了PAL制数字视频信号到VGA格式的转换,实现了PS/2鼠标的驱动及其在屏显示.对输入图像的亮度信号进行滤波,实现快速的自动聚焦算法.采用该技术,使传统的单板PAL摄像机可以被改造为具有自动聚焦功能和VGA输出接口的文档摄像机,输出更加清晰的图像.In digital PAL-video presenter, the most important component is documents camera. In this research, the authors use FPGA of Xilinx Spartan-3E XC3S250E as documents camera. The conversion of PAL digital video signal to VGA formats was implemented by using two SDRAMs as frame buffers, and the video frame rate was converted to 60 Hz after the image was magnified. Mouse is displayed on screen based on PS/2 driver. In addition, the luminance signal in images of the input PAL digital video was filtered. By using this technology, a traditional single-board PAL camera was renovated into a documents camera with auto-focusing and VGA output interface with high fidelity images.

关 键 词：图像放大 PAL VGA FPGA 自动聚焦 

分 类 号：TN911.73[电子电信—通信与信息系统]