基于h.264的网络视频监控系统设计与其算法分析-(5612)

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1、DESIGNANDALGOIul]m订ANA【YSIS0FNETWoRKVmEoSURVEILLANCESYSTEMBASEDoNH．264ANDALGoRITHMANALYSISOFNETWORKVIDEoSURVEILLANCESYSTEMBASEDONH．264ABSTRACTVideosurveillanceisanimportantapproachinthefieldofsecurity．Currently,videocableisusedinmostvideosurveillancesystemsforvideotransmissionthroug

2、hwhichthesystemsareabletomeettheneedsofcentralizedsurveillanceinacertainarea，butitcan’tbeusedforremotesurveillance．Thepaperconductsrelevantresearchanddesignconcemingthesoflfwal'eandhardwarerealizationofthevideosurveillancesystemsbasedonsuchbackground．Basedontheanalysisofsystemrequir

3、ements，DM365isselectedastheprocessorofIPcamera．TheprocessorintegratesbothDSPcoreandARM9COre．DSPcoreisusedforthevideodatacompression，andARM9COreistransplantedintotheLinuxsystemtoCalTyoutthevideonetworktransmissionprogramdevelopment．Combiningtheirrespectiveadvantagesofeachcore，DM365ca

4、nmeettherequirementsofnetworkvideosurveillancesystem．Thehardwaresystemincludespowermodule，videocapturemoduleandvideoprocessingmodule．PowermoduleusesPoEandpoweradapterasthepowerinputtorealizeDC／DCandLDOconversionwhichproducemultiplepowersupplyfortheothermodules．Designofvideocapturemo

5、duleisbasedonCMOSimagesensor．Inthispart，thispaperconductsresearchonsensor’Sworkingprinciples，designstheData—Buslevelconversioncircuitand12Ccontrolbuscircuit．ThevideocapturemoduleCanoutputthevideodataandtheprocesserCanusethe12CtofinishtheConfigurationofCMOSimagessensoEThevideoprocess

6、ingmoduleiscomposedofmultipleperipheralexpansioncircuitdesignswhichincludestheFLASH，RAM，USB，RS485，Networkinterfaceandotherserialportcircuit．ThesoftwarepartmainlydevelopstheprogrammingforARM9kernelwhichcontainstheH．264encoder，Linuxtransplant，andAPPdevelopmentunderLinux．Firstly,thispa

7、perintroducestheH．264standard，andtakesin-depthanalysisonthekeytechnologiesinH．264encodingprocess，andthepaperconfigurestheT264encodinglibraryandcompilestheexecutablefile．AbouttheLinuxtransplant，thispapermainlyintroducestheU—bootconfigurationandtransplant，Driverloading，filesystemandke

8、rnelimagemaking．The