Performance Evaluation of Spread传播绩效评价

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1、IET-UKInternationalConferenceonInformationandCommunicationTechnologyinElectricalSciences(ICTES2007),Dr.M.G.R.University,Chennai,TamilNadu,India.Dec.20-22,2007.pp.708-711.PerformanceEvaluationofSpreadSpectrumWatermarkingusingErrorControlCoding123T.S.Das,V.H.Mankar,S.K.SarkarJadavp

2、urUniversity,Kolkata-700032INDIA123tirthasankardas@yahoo.com,vijaymankar@yahoo.com,sksarkar@etce.jdvu.ac.inAbstract-Thispaperproposesanobliviouswatermarkingeachbinarydigitispopularandproventobeefficient,robustalgorithmwithblinddetectionapproachforhighvolumedataandcryptographicall

3、ysecure.Atthispointtheuseofvarioushidinginimagesignals.Wepresentadetectionreliablesignalsourceandchannel-codingorM-arymodulationschemescanadaptiveembeddingschemeformultiplemessagesinselectivesub-bandsofwavelet(DWT)coefficientsusingdirectsequencebefoundefficientforrobustnessimprov

4、ementastheyarespreadspectrum(DS-SS)modulationtechnique.Heretheimpactwidelyusedindigitalcommunicationforincreasingdataofvolumetricdistortionsourcesisanalyzedontheabilityoftransmissionreliability[3-4].analyticalboundsinordertorecoverthewatermarkmessages.InBasedonthisconceptwemaycon

5、structanencodingschemethiscontext,thejointsource-channelcodingschemehasbeenforconveyingmessageorwatermarkwithsomeextraemployedtoobtainthebettercontrolofthesystemrobustness.Thisstructurepreventsthedesynchronisationbetweenencoderinformationbitsviaatransmissionchannel.Thisextraandde

6、coderduetoselectiveembedding.TheexperimentalresultsinformationwillbeaddedintotheoriginalsignalbyusingobtainedforSpreadSpectrum(SS)transformeddomainsource-channelcodingframeworkbeforetransmissionprocesswatermarkingdemonstratetheefficiencyoftheproposedsystem.takesplace.Atthereceive

7、rthisextrainformationhelpstoThisalgorithmicarchitectureutilizestheexistingallocateddetectthewatermarkproperlytherebyprovidingbetterbandwidthinthedatatransmissionchannelinamoreefficientmanner.objectiveaswellassubjectiverecognition.IntheapplicationsofdigitalimagewatermarkingtheKeyw

8、ords-SpreadSpectrum,DWT,Source&Channelco