A Joint Source-Channel Video Coding Scheme Based on Distributed Source Coding

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1、1648IEEETRANSACTIONSONMULTIMEDIA,VOL.10,NO.8,DECEMBER2008AJointSource-ChannelVideoCodingSchemeBasedonDistributedSourceCodingYixuanZhang,CeZhu,SeniorMember,IEEE,andKim-HuiYapAbstract—Recently,severalerrorresilientschemeshavebeensuchasautomatic-retransmission-request(ARQ)[2]andfor-proposedto

2、tackletheerrorpropagationprobleminthemo-ward-errorcorrection(FEC)[3]havetheirlimitations.ARQtion-compensatedpredictivevideocodingbasedonapromisingisnotsuitableforreal-timescenariossinceitsuffersfromatechniquedistributedsourcecoding(DSC).However,theselargedelayduetofeedbacksandretransmissio

3、nsforlostorschemesmainlyapplythedistributedsourcecodesforchannelerrorcorrection,whileunder-utilizingtheircapabilityfordataerroneousdata.Ontheotherhand,FECisusuallyappliedtocompression.Achannel-awarejointsource-channelvideocodingthemostimportantinformationsuchasheaderinformationandschemebas

4、edonDSCisproposedtoeliminatetheerrorpropaga-motionvectorsduetoatightratebudget.Errorsintheunpro-tionprobleminpredictivevideocodinginamoreefficientway.tectedorlessprotectedresidualinformationwillstillcausetheItisknownthatnearSlepianWolfboundDSCisachievedusingerrorpropagation.Errorconcealment

5、atthedecodersidecanpowerfulchannelcodes,assumingthesourceanditsreference(alsoknownasside-information)areconnectedbyavirtualalsobeemployedtoconcealtheeffectoferrorstoacertainerror-pronechannel.Intheproposedscheme,thevirtualandrealdegree.Recently,anewerrorresilientvideocodingparadigmerror-pr

6、onechannelsarefusedsothataunifiedsinglechannelbasedondistributedsourcecoding(DSC)principlehasreceivedcodeisappliedtoencodethecurrentframethusaccomplishingincreasingresearchattentionwherethepredictedframeisen-ajointsource-channelcoding.Ouranalysisoftherateefficiencycodedindependentlyofitsrefe

7、renceframe,thusimprovingro-inrecoveringerrorpropagationshowsthatthejointschemecanachievealowerratecomparedwithperformingsourceandbustnessagainstthereferenceframeerrors.channelcodingseparately.SimulationresultsshowthattheDSCreferstotheencodingoftwoormorecorrela