移動視頻通信中的糾錯編碼及錯誤隱藏.pdf

1、中國科學(xué)技術(shù)大學(xué)碩士學(xué)位論文移動視頻通信中的糾錯編碼及錯誤隱藏姓名：朱飛躍申請學(xué)位級別：碩士專業(yè)：信息與通信工程、通信與信息系統(tǒng)指導(dǎo)教師：王穎20040501中圜科學(xué)披術(shù)大學(xué)倆二【：學(xué)位論文AbstractWiththewideapplicationofmobilevideocommumcahon，videotransmissionwithhighqualityandstabilizationbecomesmoreandmoreimpo

2、rtantWirelesschannelsformobilecommunicationusuallyhavehigherrorbitrateandbursterrors，F(xiàn)ECanderrorconcealmentaretheimportanttechniqueswhichCanensurequalityofvideocommunicationinthisthesis，F(xiàn)ECanderrorconcealmentarestudiedac

3、cordingtothecharactersofwirelesschannelsBasedontheanalysisandsummarizationofpresenttechniquesofFEC，ConcatenatedCodesareappliedcombinedwiminterweavingtechniqueConcatenatedCodesareusedtoconcatenatetwoormoreerrorcorrectionc

4、odesinordertoimprovetheabilitiesoferrorcorrectionbyreducingthecomplicationofhardwareandincreasingthegrouplengthofcodes；andinterleavingisusedtochangebursterrorstandomerrors，SOthattheerrorcorrectioncodesforrandomerrorsCanb

5、eappliedrightlyThecomputersimulationsshowthattheerrorbitrateCanbedecreasedfrom1925x10。2to2614x10一inurbanareaTheresultsCansatisfytherequirementofhumaneyesifimportantbitshavenoerrorsItshowsthatthismethodimprovesthequalityo

6、fvideotransmission，anddecreasethecomplexityoftheencodenInthisthesis，anothernewwaytoarrangemacroblockswithinterleavingispresented，anditensurestheadjoiningmicroblocksnothaveerrorsatthesametime，thus，errorconcealmentwillbewe

7、llappliedunderlongbursterrorconditionsTheanalysismadsimulationshowthatthistechniquehasfollowingmerits：(1)easytoimplement，(2)obviouslyimprovetheefficiencyofvideoerrorrecoveryand(3)needslittleredundancybitsThemethodsofthis

8、thesisaimsatsolvingsomeproblemstopreventthedecreaseofqualityofvideoservice，whichiscausedbyhigherrorbitrateandbursterrorsinwirelesschannels，andhavethecapacitiesofimprovingqualityofvideotransmissionKeywords：Mobilechannel；V