分布式VGA显示技术

发布时间：2018-03-17 13:03

本文选题：VGA　切入点：DSP　出处：《天津大学》2008年硕士论文　论文类型：学位论文

【摘要】： “分布式VGA显示技术”是一种嵌入式便携式的VGA显示设备,同时还具有百兆网络和数字信号处理功能。它可以在不使用计算机和VGA显示卡的情况下,实现VGA图像的显示和控制,主要可应用于大型超市、车站、飞机场等公共场所的广告宣传和提示信息显示,也可以安装在工厂车间,用于生产过程中的操作信息显示,还可以开发成多媒体电子挂历系统应用于日常生活。本文设计并实现了1024*768图像(XGA)、800*600图像(SVGA)和640*480图像(VGA)三种分辨率图像的显示,并完成了DM9000A网卡驱动和TCP/IP协议的编写, TCP/IP协议是高速实时的有校验协议,可实现远程通信,可实现一个计算机控制多个嵌入式设备,每个设备独占一个IP和物理地址,它能实现数字信号处理,网络控制,传输数据,视频等。本文的主要工作包括: 1、在分析了VGA显示标准和信号要求的基础上,提出了分布式VGA显示体系的具体设计方案。 2、搭建了分布式VGA显示技术的硬件结构,能对VGA图像进行实时快速显示并实现了可调分辨率。设计了可编程逻辑器件CPLD发生VGA显示时序的方法。 3、采用了快速一维IDCT算法,通过四级运算,使8位一维IDCT变换只需要29次乘法和11次加法就能实现,利用提高了JPEG图像的解码速度,进而提高了系统的实时性。 4、设计了分布式VGA显示技术的嵌入式软件和上位机软件。利用WINSOCK编程实现了上位机网络控制过程。大容量的SDRAM,FLASH实现了数据的存储,DM9000A控制器可实现100M高速双工传输。
[Abstract]:"Distributed VGA display technology is a kind of portable embedded VGA display device, but also has a fast network and digital signal processing function. It can display card without using a computer and VGA, display and control of the VGA image, can be used in large supermarket, station, airport and other public places advertising propaganda and prompt information display, can also be installed in the factory, for the operation of information in the production process, can also be developed into a multimedia electronic calendar system used in daily life. This paper designed and implemented a 1024* 768 image (XGA), 800*600 (SVGA) images and 640*480 images (VGA) of three kinds of image display, and completed the preparation of DM9000A driver and the TCP/IP protocol, TCP/IP protocol is a high-speed real-time calibration protocol, can realize remote communication, can realize a plurality of embedded computer control Equipment, each device occupies a single IP and physical address. It can handle digital signal processing, network control, transmission of data, video and so on.
The main work of this article includes:
1, based on the analysis of the VGA display standard and the signal requirements, the specific design scheme of the distributed VGA display system is proposed.
2, the hardware structure of the distributed VGA display technology is built, which can display the VGA images in real time and achieve the adjustable resolution. We design a programmable logic device CPLD to generate VGA display timing.
3, the fast one-dimensional IDCT algorithm is adopted. Through the four level operation, the 8 bit one-dimensional IDCT transform can only be realized by 29 times multiplication and 11 times addition, which improves the decoding speed of JPEG image and improves the real-time performance of the system.
4, we designed the embedded software and PC software of the distributed VGA display technology. We realized the host computer network control process by WINSOCK programming. The large capacity SDRAM and FLASH realized the data storage, and the DM9000A controller can achieve the high-speed duplex transmission of 100M.

【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2008
【分类号】：TP334.1

【引证文献】