本文選題：VGA　切入點(diǎn)：DSP　出處：《天津大學(xué)》2008年碩士論文　論文類型：學(xué)位論文

【摘要】： “分布式VGA顯示技術(shù)”是一種嵌入式便攜式的VGA顯示設(shè)備,同時(shí)還具有百兆網(wǎng)絡(luò)和數(shù)字信號(hào)處理功能。它可以在不使用計(jì)算機(jī)和VGA顯示卡的情況下,實(shí)現(xiàn)VGA圖像的顯示和控制,主要可應(yīng)用于大型超市、車站、飛機(jī)場(chǎng)等公共場(chǎng)所的廣告宣傳和提示信息顯示,也可以安裝在工廠車間,用于生產(chǎn)過程中的操作信息顯示,還可以開發(fā)成多媒體電子掛歷系統(tǒng)應(yīng)用于日常生活。本文設(shè)計(jì)并實(shí)現(xiàn)了1024*768圖像(XGA)、800*600圖像(SVGA)和640*480圖像(VGA)三種分辨率圖像的顯示,并完成了DM9000A網(wǎng)卡驅(qū)動(dòng)和TCP/IP協(xié)議的編寫, TCP/IP協(xié)議是高速實(shí)時(shí)的有校驗(yàn)協(xié)議,可實(shí)現(xiàn)遠(yuǎn)程通信,可實(shí)現(xiàn)一個(gè)計(jì)算機(jī)控制多個(gè)嵌入式設(shè)備,每個(gè)設(shè)備獨(dú)占一個(gè)IP和物理地址,它能實(shí)現(xiàn)數(shù)字信號(hào)處理,網(wǎng)絡(luò)控制,傳輸數(shù)據(jù),視頻等。 本文的主要工作包括: 1、在分析了VGA顯示標(biāo)準(zhǔn)和信號(hào)要求的基礎(chǔ)上,提出了分布式VGA顯示體系的具體設(shè)計(jì)方案。 2、搭建了分布式VGA顯示技術(shù)的硬件結(jié)構(gòu),能對(duì)VGA圖像進(jìn)行實(shí)時(shí)快速顯示并實(shí)現(xiàn)了可調(diào)分辨率。設(shè)計(jì)了可編程邏輯器件CPLD發(fā)生VGA顯示時(shí)序的方法。 3、采用了快速一維IDCT算法,通過四級(jí)運(yùn)算,使8位一維IDCT變換只需要29次乘法和11次加法就能實(shí)現(xiàn),利用提高了JPEG圖像的解碼速度,進(jìn)而提高了系統(tǒng)的實(shí)時(shí)性。 4、設(shè)計(jì)了分布式VGA顯示技術(shù)的嵌入式軟件和上位機(jī)軟件。利用WINSOCK編程實(shí)現(xiàn)了上位機(jī)網(wǎng)絡(luò)控制過程。大容量的SDRAM,FLASH實(shí)現(xiàn)了數(shù)據(jù)的存儲(chǔ),DM9000A控制器可實(shí)現(xiàn)100M高速雙工傳輸。
[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.

【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2008
【分類號(hào)】：TP334.1

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前4條

1 陶Z，

本文編號(hào)：1624854