【摘要】： LED全彩顯示屏應(yīng)用發(fā)展迅速。在國(guó)內(nèi)城市中越來(lái)越多的廣場(chǎng)屏，廣告屏被應(yīng)用。國(guó)外LED全彩屏市場(chǎng)同樣發(fā)展迅猛。目前的LED顯示屏一般把設(shè)計(jì)好的圖像儲(chǔ)存在系統(tǒng)硬件(如Flash或Rom)里，或者利用計(jì)算機(jī)現(xiàn)場(chǎng)輸入信號(hào)實(shí)現(xiàn)視頻功能，存在靈活性不高的弊端。此外，多數(shù)系統(tǒng)均采用RGB信號(hào)或者電視制式信號(hào)直接用傳輸，這嚴(yán)重影響了傳輸速率且增大了顯示屏圖像處理的信號(hào)量。 本論文旨在通過(guò)設(shè)計(jì)先進(jìn)的新型LED全彩顯示屏控制系統(tǒng)，實(shí)現(xiàn)技術(shù)創(chuàng)新的目標(biāo)，達(dá)到設(shè)計(jì)出自主知識(shí)產(chǎn)權(quán)的先進(jìn)LED全彩屏控制系統(tǒng)的目的。主要工作如下： (1)利用最新的視頻壓縮算法H.264標(biāo)準(zhǔn)對(duì)視頻進(jìn)行壓縮。借助H.264對(duì)流媒體的高壓縮率，減少了數(shù)據(jù)傳輸量，實(shí)現(xiàn)高質(zhì)量的圖像傳輸。壓縮后適應(yīng)無(wú)線網(wǎng)絡(luò)現(xiàn)有網(wǎng)絡(luò)帶寬限制，實(shí)現(xiàn)無(wú)線網(wǎng)絡(luò)傳輸。 (2)引入了Internet與現(xiàn)有GPRS(EDGE)網(wǎng)絡(luò)技術(shù)實(shí)現(xiàn)無(wú)線網(wǎng)絡(luò)傳輸。增加了LED顯示屏布置的靈活性。利用無(wú)線網(wǎng)絡(luò)降低了架設(shè)施工的成本。采用Internet體系結(jié)構(gòu)便于升級(jí)IPv6網(wǎng)絡(luò)傳輸與未來(lái)3G技術(shù)相結(jié)合，具有很強(qiáng)的技術(shù)前瞻性和先進(jìn)性。 (3)設(shè)計(jì)了用戶視頻平臺(tái)和網(wǎng)絡(luò)登錄服務(wù)器系統(tǒng)，進(jìn)行遠(yuǎn)程LED視頻顯示服務(wù)。通過(guò)服務(wù)器連接終端屏，用戶可以同時(shí)連接幾塊屏，實(shí)現(xiàn)一機(jī)多控。 (4)使用了最先進(jìn)的流媒體視頻DSP解決方案——TI公司的Davinci圖像處理技術(shù)。Davinci技術(shù)芯片TDS320DM6446提供了ARM和DSP雙內(nèi)核。通過(guò)嵌入式系統(tǒng)的應(yīng)用和DSP圖像處理技術(shù)，很好的解決了本系統(tǒng)從H.264編碼到無(wú)線網(wǎng)絡(luò)傳輸?shù)募夹g(shù)難題，，設(shè)計(jì)了具有國(guó)際技術(shù)先進(jìn)水平的系統(tǒng)。
[Abstract]:LED full color display is developing rapidly. In the domestic city more and more square screen, advertisement screen is used. Foreign LED full color screen market also develops rapidly. At present, the LED display usually stores the designed image in the system hardware (such as Flash or Rom), or uses the computer field input signal to realize the video function, which has the disadvantage of low flexibility. In addition, most systems use RGB signal or TV signal to transmit directly, which seriously affects the transmission rate and increases the signal quantity of display screen image processing. The purpose of this paper is to achieve the goal of technological innovation through the design of advanced LED full-color display control system, and to design the advanced LED full-color display control system with independent intellectual property rights. The main work is as follows: (1) Video compression algorithm H. 264 is used to compress video. With the help of H. 264, the high compression ratio of streaming media can reduce the amount of data transmission and achieve high quality image transmission. After compression, it adapts to the existing network bandwidth limitation and realizes wireless network transmission. (2) introduce Internet and existing GPRS (EDGE) network technology to realize wireless network transmission. Increased flexibility in LED display layout. The cost of erection construction is reduced by using wireless network. It is convenient to upgrade IPv6 network transmission with 3G technology in the future by using Internet architecture. It has strong technical foresight and advanced nature. (3) user video platform and network login server system are designed to provide remote LED video display service. Through the server connection terminal screen, the user can connect several screens at the same time, realize a machine multi-control. (4) using the most advanced DSP solution of streaming media video, the Davinci image processing technology of TI Company. The Davinci chip TDS320DM6446 provides ARM and DSP dual cores. Through the application of embedded system and DSP image processing technology, this system solves the technical problem from H.264 coding to wireless network transmission, and designs a system with advanced international technology.
【學(xué)位授予單位】：華南師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2007
【分類號(hào)】：TN141

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相關(guān)碩士學(xué)位論文 前4條

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2 張華;基于ARM的大屏幕LED顯示系統(tǒng)的設(shè)計(jì)研究[D];四川大學(xué);2004年

3 張叔猛;嵌入式系統(tǒng)和FPGA在LED顯示屏中的應(yīng)用研究與實(shí)現(xiàn)[D];武漢理工大學(xué);2005年

4 陳小鵬;GPRS在LED顯示系統(tǒng)上的應(yīng)用[D];上海海事大學(xué);2004年

本文編號(hào)：2422470