基于S3C2440的linux嵌入式視頻監(jiān)控系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn).pdf

1、論文題目：基于S3C2440的linux嵌入式視頻監(jiān)控系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)專業(yè)：電路與系統(tǒng)碩士生：張凱（簽名）__________指導(dǎo)教師：王建新（簽名）__________摘要傳統(tǒng)的視頻監(jiān)控系統(tǒng)雖然功能齊全，但價(jià)格昂貴并操作復(fù)雜，不適于普遍應(yīng)用。隨著流媒體技術(shù)、無線網(wǎng)絡(luò)技術(shù)以及視頻壓縮技術(shù)的不斷進(jìn)步，視頻監(jiān)控系統(tǒng)的應(yīng)用日益廣泛和深入，監(jiān)控的規(guī)模和范圍也不斷擴(kuò)大，基于嵌入式移動(dòng)終端設(shè)備和網(wǎng)絡(luò)的遠(yuǎn)程視頻監(jiān)控具有成本體，操作簡(jiǎn)單，低功耗等優(yōu)點(diǎn)，具

2、有廣闊的應(yīng)用前景。本文結(jié)合嵌入式監(jiān)控系統(tǒng)的性能需求，提出一種基于S3C2440的嵌入式Linux視頻監(jiān)控系統(tǒng)。嵌入式監(jiān)控系統(tǒng)硬件采用ARM架構(gòu)的處理器S3C2440平臺(tái)，主頻為400MHZ，滿足視頻采集、視頻壓縮編碼和網(wǎng)絡(luò)傳輸?shù)奶幚砟芰?。操作系統(tǒng)采用開源的Linux系統(tǒng)，該系統(tǒng)易于對(duì)底層硬件設(shè)備訪問控制，同時(shí)為上層應(yīng)用軟件提供API接口調(diào)用，并負(fù)責(zé)軟硬件資源分配、任務(wù)調(diào)度、協(xié)調(diào)控制等工作為監(jiān)控系統(tǒng)提供軟件平臺(tái)。本文嵌入式監(jiān)控軟件系統(tǒng)設(shè)計(jì)

3、采用模塊化設(shè)計(jì)方案。將軟件設(shè)計(jì)劃分為視頻采集模塊、視頻壓縮編碼模塊、視頻網(wǎng)絡(luò)傳輸模塊、視頻顯示模塊。其中視頻采集模塊采用V4L2架構(gòu)并對(duì)MJPEG和YUV兩種類型數(shù)據(jù)格式進(jìn)行視頻采集，實(shí)現(xiàn)移植平臺(tái)和采集類型多樣化；視頻壓縮編碼模塊采用H.264視頻壓縮技術(shù)，實(shí)現(xiàn)減少網(wǎng)絡(luò)傳輸帶寬；視頻網(wǎng)絡(luò)傳輸模塊采用TCP網(wǎng)絡(luò)傳輸協(xié)議，實(shí)現(xiàn)減少丟包、網(wǎng)絡(luò)延遲；視頻顯示模塊采用SDL庫，實(shí)現(xiàn)視頻數(shù)據(jù)顯示實(shí)時(shí)性。在此基礎(chǔ)上提出基于S3C2440的linux嵌

4、入式視頻監(jiān)控系統(tǒng)設(shè)計(jì)總體方案，首先首先搭建系統(tǒng)軟件開發(fā)平臺(tái)包含建立嵌入式linux交叉編譯環(huán)境、編譯開發(fā)板Uboot、完成linux內(nèi)核移植與裁剪、制作linux根文件系統(tǒng)。其次完成每個(gè)模塊的軟件實(shí)現(xiàn)，并對(duì)整個(gè)監(jiān)控系統(tǒng)進(jìn)行測(cè)試分析，達(dá)到監(jiān)控系統(tǒng)的性能指標(biāo)。最后提出結(jié)論與展望。關(guān)鍵詞：視頻監(jiān)控系統(tǒng)，MJPEG，YUYV，V4L2，TCP，SDL研究類型：應(yīng)用研究Subject:DesignResearchofEmbeddedLinuxVi

5、deoMonitingSystemBasedonS3C2440Specialty:CircuitSystemName:ZhangKai(Signature)Instruct:WangJianxin(Signature)ABSTRACTAlthoughthetraditionalvideomonitingsystemhasmultiplefunctionsitisexpensivecomplicatednotsuitablefgenera

6、lapplication.Withthedevelopmentofstreamingmediatechnologywirelesswktechnologyvideocompressiontechnologyvideomonitingsystemhasbeenwidelythesizescopeofmonitingisalsoexping.videoembeddedmobileterminaldeviceswkhasbroadapplic

7、ationprospectsbasedoncostsimpleoperationlowpowerconsumption.BasedontheembeddedmonitingcontrolsystemperfmancerequirementsitputsfwardtheembeddedLinuxvideomonitingsystembasedonS3C2440.HardwareofthesystemadoptsS3C2440platfmA

8、RMprocessarchitecturethatclockedat400MHZfmeetingtheprocessingabilityofvideoacquisitionvideocompressionwktransmission.OperatingsystemadoptsLinuxopensourcesystem.Thesystemiseasytocontrolaccesstotheunderlyinghardwareequipme

9、ntprovidesAPIinterfacefupperapplicationsoftware.itisresponsiblefthecodinationofcontrolsoftwarehardwareresourceallocationtaskschedulingwktosoftwareplatfmfthemonitingsystem.Inthispapertheembeddedmonitingsystemsoftwaredesig

10、nusesthemodulardesign.Thesoftwaredesignisdividedintothevideocapturemodulevideocompressioncodingmodulevideowktransmissionmodulevideodisplaymodule.AmongthevideocapturemoduleusesV4L2architecturevideocollectionintheMJPEGtheY

11、UVtwokindsoftypesofdatafmat.Itrealizesthetransplantplatfmcollection.ThevideocompressioncodingmoduleusesH.264videocompressiontechnologyfreducingthewkbwidth.ThevideowktransmissionmoduleusesTCPwktransmissionthatitcanreducet