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ID:39711472
大小:991.25 KB
页数:9页
时间:2019-07-09
《A Joint Source-Channel Video Coding Scheme Based on Distributed Source Coding》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
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
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