發(fā)布時(shí)間：2019-04-19 09:39

【摘要】：本課題為視頻圖像大容量、高清、遠(yuǎn)距離的傳輸提供了具體的設(shè)計(jì)方案,實(shí)現(xiàn)了單路VGA(或DVI)非壓縮高清視頻的實(shí)時(shí)化與數(shù)字化的傳輸。系統(tǒng)采用模塊化的設(shè)計(jì)方法,將整個(gè)系統(tǒng)劃分為：圖像采集模塊、FPGA處理模塊、圖像顯示模塊、光接口模塊等4個(gè)模塊組成。系統(tǒng)設(shè)計(jì)采用了信源編碼、時(shí)鐘恢復(fù)技術(shù)以及光纖通信技術(shù),在保證系統(tǒng)功能性的同時(shí)增強(qiáng)了系統(tǒng)的可靠性。系統(tǒng)采用信源編碼技術(shù),將行、場(chǎng)同步信號(hào)以及像素時(shí)鐘信號(hào)編碼插入到行消隱信號(hào)中發(fā)送,與傳統(tǒng)的FPGA+外部SDRAM方式相比提高了速度,也解決了需要大容量的外部SDRAM緩存的問題。系統(tǒng)針對(duì)不同圖像格式在傳輸過程中的快速切換的問題,利用Xilinx FPGA內(nèi)部PLL動(dòng)態(tài)配置的特點(diǎn)來設(shè)計(jì)同步時(shí)鐘的恢復(fù),可以在2us左右恢復(fù)像素時(shí)鐘。測(cè)試結(jié)果表明：該系統(tǒng)能夠傳輸圖像的最高分辨率達(dá)到1280×1024@60Hz：傳輸圖像格式的切換時(shí)間延遲在2us以內(nèi),且切換速度快,圖像沒有延遲和拖尾現(xiàn)象,整個(gè)系統(tǒng)工作穩(wěn)定,實(shí)時(shí)傳輸視頻效果良好。
[Abstract]:This paper provides a concrete design scheme for large-capacity, high-definition, long-distance transmission of video images, and realizes the real-time and digital transmission of single-channel VGA (or DVI) uncompressed high-definition video. The whole system is divided into four modules: image acquisition module, FPGA processing module, image display module and optical interface module. The system design adopts source coding, clock recovery and optical fiber communication technology, which not only ensures the function of the system, but also enhances the reliability of the system. The system uses the source coding technology to insert the line, field synchronization signal and pixel clock signal into the line blanking signal for transmission, which improves the speed compared with the traditional external SDRAM mode of FPGA. It also solves the problem of large capacity external SDRAM cache. Aiming at the problem of fast switching between different image formats in the process of transmission, the system uses the characteristics of dynamic configuration of PLL in Xilinx FPGA to design the recovery of synchronous clock, which can recover pixel clock around 2us. The test results show that the maximum resolution of the system can reach 1280 脳 1024x60Hz. The switching time delay of the transmitted image format is less than 2us, and the switching speed is fast. There is no delay and trailing phenomenon in the image, and the whole system works stably. Real-time video transmission effect is good.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.11

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 韓紅霞;郭勁;曹立華;耿愛輝;;基于FPGA的高速視頻信息光纖傳輸方案設(shè)計(jì)[J];電子器件;2005年04期

2 朱奕丹;方怡冰;;基于FPGA的圖像采集與VGA顯示系統(tǒng)[J];計(jì)算機(jī)應(yīng)用;2011年05期

3 張倩;胡健生;;RGB格式數(shù)據(jù)向BT.656視頻標(biāo)準(zhǔn)轉(zhuǎn)換的關(guān)鍵技術(shù)[J];液晶與顯示;2011年05期

相關(guān)碩士學(xué)位論文 前1條

1 王銳煌;基于FPGA的嵌入式視覺檢測(cè)系統(tǒng)及IP核設(shè)計(jì)[D];廣東工業(yè)大學(xué);2011年

，

本文編號(hào)：2460829