【摘要】： LED全彩顯示屏應用發(fā)展迅速。在國內城市中越來越多的廣場屏，廣告屏被應用。國外LED全彩屏市場同樣發(fā)展迅猛。目前的LED顯示屏一般把設計好的圖像儲存在系統(tǒng)硬件(如Flash或Rom)里，或者利用計算機現(xiàn)場輸入信號實現(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信號或者電視制式信號直接用傳輸，這嚴重影響了傳輸速率且增大了顯示屏圖像處理的信號量。 本論文旨在通過設計先進的新型LED全彩顯示屏控制系統(tǒng)，實現(xiàn)技術創(chuàng)新的目標，達到設計出自主知識產權的先進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標準對視頻進行壓縮。借助H.264對流媒體的高壓縮率，減少了數(shù)據(jù)傳輸量，實現(xiàn)高質量的圖像傳輸。壓縮后適應無線網絡現(xiàn)有網絡帶寬限制，實現(xiàn)無線網絡傳輸。 (2)引入了Internet與現(xiàn)有GPRS(EDGE)網絡技術實現(xiàn)無線網絡傳輸。增加了LED顯示屏布置的靈活性。利用無線網絡降低了架設施工的成本。采用Internet體系結構便于升級IPv6網絡傳輸與未來3G技術相結合，具有很強的技術前瞻性和先進性。 (3)設計了用戶視頻平臺和網絡登錄服務器系統(tǒng)，進行遠程LED視頻顯示服務。通過服務器連接終端屏，用戶可以同時連接幾塊屏，實現(xiàn)一機多控。 (4)使用了最先進的流媒體視頻DSP解決方案——TI公司的Davinci圖像處理技術。Davinci技術芯片TDS320DM6446提供了ARM和DSP雙內核。通過嵌入式系統(tǒng)的應用和DSP圖像處理技術，很好的解決了本系統(tǒng)從H.264編碼到無線網絡傳輸?shù)募夹g難題，，設計了具有國際技術先進水平的系統(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.
【學位授予單位】：華南師范大學
【學位級別】：碩士
【學位授予年份】：2007
【分類號】：TN141

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相關碩士學位論文 前4條

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本文編號：2422470