【摘要】：微型投影儀具有投影色彩清晰、結(jié)構(gòu)緊湊、可野外使用和功耗低待機(jī)長(zhǎng)等特點(diǎn)成為電子地圖顯示的首選。除地圖顯示功能外,微型投影儀還具備文檔及視頻放映功能,不僅滿(mǎn)足軍事用途,其鮮明的特點(diǎn)也符合現(xiàn)代商務(wù)移動(dòng)辦公的需要,因而具有廣泛應(yīng)用市場(chǎng)和發(fā)展前途。本文正是基于以上需求,對(duì)微型投影儀中的關(guān)鍵技術(shù),視頻信號(hào)處理作為對(duì)象展開(kāi)深入研究。最終成果為開(kāi)發(fā)出滿(mǎn)足軍民兩用的手持式微型投影儀。主要研究?jī)?nèi)容包括:1.研究當(dāng)今視頻接口與色度空間的發(fā)展歷程和技術(shù)特征,結(jié)合實(shí)際功能需求,選定視頻接口及色度空間類(lèi)型方案,并完成采用“嵌入式處理器+安卓操作平臺(tái)+FPGA圖像處理”的總體方案設(shè)計(jì)。2.研究微型投影儀視頻處理單元硬件系統(tǒng)架構(gòu),完成視頻信號(hào)處理單元的硬件平臺(tái)電路設(shè)計(jì)。視頻處理單元包含了輸入視頻信號(hào)轉(zhuǎn)換碼電路,主要由TFP401A解碼芯片和外接HDMI接口電路組成;基于XC3S200AN-4FT256C芯片的視頻信號(hào)處理平臺(tái)及外圍器件。實(shí)現(xiàn)將輸入的多種視頻格式源信號(hào)轉(zhuǎn)換為RGB色彩空間,最終由FPGA對(duì)DLP投影芯片發(fā)出符合規(guī)范的視頻圖像。3.參照VESA_VGA時(shí)序標(biāo)準(zhǔn),基于FPGA完成接口協(xié)議轉(zhuǎn)換的邏輯代碼編寫(xiě)與調(diào)試。實(shí)現(xiàn)與ARM單元指令通信,關(guān)鍵參數(shù)自動(dòng)識(shí)別,輸入像素色度增強(qiáng),分辨率調(diào)整,輸出像素色度補(bǔ)償和視頻控制信號(hào)再生成等。對(duì)微型投影儀進(jìn)行輔助電源管理,HDL編碼進(jìn)行低功耗設(shè)計(jì)等手段降低其功耗。本論文的視頻信號(hào)處理單元,完成了HDMI接口信號(hào)到DVI接口的RGB真彩視頻精確同步與視頻格式轉(zhuǎn)換,代碼采用模塊化設(shè)計(jì)預(yù)留下擴(kuò)展空間。經(jīng)測(cè)試驗(yàn)證,硬件設(shè)計(jì)輸出信號(hào)時(shí)序及投影效果均達(dá)到了預(yù)期的設(shè)計(jì)目標(biāo),同時(shí)也為后期進(jìn)一步優(yōu)化性能及擴(kuò)展功能打下了良好的基礎(chǔ)。
[Abstract]:The miniature projector has the characteristics of clear color, compact structure, field use and low power consumption. It is the first choice of electronic map display. In addition to the map display function, the micro projector also has the functions of document and video projection, which not only meet the military purposes, but also meet the needs of modern business mobile office, so it has a wide application market and development prospect. Based on the above requirements, the key technology of micro projector, video signal processing, is studied in this paper. The final result is the development of a hand-held micro projector for both military and civil use. The main contents are as follows: 1. This paper studies the development course and technical characteristics of video interface and chrominance space, and selects the scheme of video interface and chrominance space type according to the actual functional requirements. And complete the "embedded processor Android operating platform FPGA image processing" overall design. 2. The hardware system architecture of video processing unit of micro projector is studied, and the hardware platform circuit design of video signal processing unit is completed. The video processing unit includes the input video signal conversion code circuit, which is mainly composed of the TFP401A decoding chip and the external HDMI interface circuit, the video signal processing platform based on the XC3S200AN-4FT256C chip and the peripheral devices. The input source signal of various video formats is converted into RGB color space, and finally, the FPGA sends out the standard video image to the DLP projector chip. 3. 3. Referring to VESA_VGA timing standard, the logic code of interface protocol conversion based on FPGA is written and debugged. It realizes communication with ARM unit instruction, automatic recognition of key parameters, enhancement of input pixel chromaticity, resolution adjustment, output pixel chrominance compensation and video control signal re-generation. The power consumption of micro projector is reduced by means of auxiliary power management and low power design by HDL coding. The video signal processing unit of this paper completes the precise synchronization and video format conversion of RGB real color video from HDMI interface signal to DVI interface. The code adopts modularized design to reserve expansion space. The test results show that the timing of the output signal and the projection effect of the hardware design reach the expected design goal, and also lay a good foundation for the further optimization of the performance and the extended function in the later stage.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN919.8

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 ;2012年中國(guó)投影機(jī)市場(chǎng)[J];辦公自動(dòng)化;2012年11期

2 蘇長(zhǎng)云;單兵系統(tǒng)體系結(jié)構(gòu)及其關(guān)鍵技術(shù)分析[J];情報(bào)指揮控制系統(tǒng)與仿真技術(shù);2000年01期

3 劉金嶺;柴鎖柱;;DVI接口的TMDS鏈路通訊中抖動(dòng)問(wèn)題研究[J];微計(jì)算機(jī)信息;2006年12期

，

本文編號(hào)：2314566