視頻實(shí)時(shí)傳輸環(huán)境下PB幀編碼與預(yù)處理技術(shù)研究.pdf

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2、；j，1j：窖一秀二磊j；驤女黼；主壘壘生篁奎星j：≥‘|一≮南京郵電大學(xué)碩士研究生學(xué)位論文AbstractABSTRACTItishighlydemandedtotransmithighqualityvideowithlowbitrate，whilebeingadaptivetovariousnetworksFortheincreasingrequirementofrealtimevideoapplication，thestudies

3、onDSPbasedrealtimecodingwith11ighperformanceandpreprocessinghavepracticalsignificaceThemainworkofthisthesisisontheenhancementofrealtimevideocodingperformance。SpecialinterestsaleputontherealizationofPB—frameadvancedmodeof

4、H263andthehardwarebasedpreprocessingAccordingtodifferentnetworktransmissionabilityandratecontrol，practicalschemesforrealtimevideocodingaleimplemented，whichimprovethecodingefficiencyandtheimagequalityaswellAtfirst，thePB—f

5、lameadvancedcodingmodeisadoptedintheinterframepredictivecoding，andrealizedinCDMAtransmissionmode，which，inturnenhancestheframeratewithoutnotablebitrateincreaseSecondlyImageCo—ProcessorofTM1300isusingtofilterOutinputnoisea

6、timagecapturingstage，resultinginbetterreconstructingimagequalityLastlypracticaltestsandperformancetestsalecarriedoutforthePB—framecodingandimagepreprocessingbasedonthemultimodewirelessvideotransmissionsystemTheresultssho