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1、基于FPGA的VGA和HDMI視頻拼接系統(tǒng)設(shè)計(jì)摘要隨著圖像顯示技術(shù)的快速發(fā)展,圖像用戶界面和人機(jī)交互界面正朝著智能化、高速化、大屏幕化方向邁進(jìn)。目前圖像顯示系統(tǒng)多數(shù)是采用早期的專用處理芯片,其運(yùn)算速度和設(shè)計(jì)靈活性一般都較低。FPGA的發(fā)展為圖像存儲(chǔ)與顯示系統(tǒng)的高速和高集成度提供了新的方法和解決思路,F(xiàn)PGA本身?yè)碛兄鴱?qiáng)大的邏輯資源,并利用片外的配置資源和模塊化的設(shè)計(jì)思路,可實(shí)現(xiàn)圖像存儲(chǔ)與顯示系統(tǒng)。論文采用Altera公司推出的CycloneIVFPGA,結(jié)合該系列芯片的結(jié)構(gòu)特點(diǎn),對(duì)其功能以及配置方
2、式做了詳細(xì)的說(shuō)明,并簡(jiǎn)要的介紹了系統(tǒng)設(shè)計(jì)中所涉及的軟硬件開發(fā)環(huán)境和顯示原理,重點(diǎn)研究基于FPGA的圖像信號(hào)剪切、存儲(chǔ)和顯示,系統(tǒng)采用基于FPGA的高速陣列的信號(hào)處理模式,提出了一種基于硬件的圖像存儲(chǔ)與顯示的視頻拼接顯示方法。該設(shè)計(jì)以FPGA為數(shù)字處理的核心,分為圖像處理模塊、圖像存儲(chǔ)模塊和圖像顯示模塊,通過(guò)處理輸入的視頻信號(hào),把視頻剪切成兩部分,分別以VGA和HDMI在兩個(gè)顯示器里分別顯示,實(shí)現(xiàn)了視頻的拼接顯示功能。關(guān)鍵字:FPGAVGAHDMI拼接顯示VGAandHDMIvideosplicin
3、gFPGA-baseddisplayABSTRACTAstheimageshowstherapiddevelopmentoftechnology,graphicaluserinterfaceandinteractiveinterfaceismovingintelligent,high-speed,largescreendirection.Atpresent,themajorityoftheimagedisplaysystemistheuseofdedicatedprocessingchipearl
4、y,usuallyitsspeedofoperationanddesignflexibilityarelow.FPGAdevelopmentforhigh-speedandhighlyintegratedimagestorageanddisplaysystemprovidesanewapproachandsolutionideas,FPGAitselfhasapowerfullogicresourcesanduseoff-chipresourceallocationandmodulardesign
5、ideascanberealizedImagesstorageanddisplaysystem.Thesis,AlterahasintroducedCycloneIVFPGA,combinedwiththestructuralcharacteristicsofthechipsandtheirfunctionsaswellasadetailedconfigurationinstructions,andabriefdescriptionofthesysteminvolvedinthedesignofh
6、ardwareandsoftwaredevelopmentenvironmentanddisplayprinciplefocusCutimagesignalbasedonFPGA,storageanddisplay,thesystemusesthesignalprocessingFPGA-basedhigh-speedmodearrays,weproposeahardware-basedimagestorageanddisplaymethodfordisplayingvideosplicing.T
7、hedigitalprocessingdesignedtoFPGAcore,dividedintoanimageprocessingmodule,animagestoragemoduleandanimagedisplaymodule,byprocessingtheinputvideosignal,thevideocutintotwoparts,respectivelyinthetwoVGAmonitorsandHDMILanerespectivelydisplay,toachieveavideom
8、osaicdisplayfunction.Keywords:FPGAVGAHDMITiledDisplay目錄1緒論12系統(tǒng)總體設(shè)計(jì)與技術(shù)基礎(chǔ)22.1技術(shù)概述22.1.1AlteraFPGA介紹22.1.2顯示原理32.1.3顏色空間42.1.4FPGA設(shè)計(jì)流程簡(jiǎn)介53系統(tǒng)硬件設(shè)計(jì)63.1FPGA器件選型及外圍電路63.2FLASH電路設(shè)計(jì)83.3DDR2電路設(shè)計(jì)83.4視頻輸入電路設(shè)計(jì)103.5VGA接口電路設(shè)計(jì)113.6HDMI接口電路設(shè)計(jì)143.7硬件電路總體框圖154軟件部