数字水印技术在视频认证中的应用和实现

中南民族大学硕士学位论文数字水印技术在视频认证中的应用和实现姓名：史继伟申请学位级别：硕士专业：计算机应用技术指导教师：熊志勇20090523IInternetMPEG-4IIAbsrtactWiththerapidenhancementofthecomputeabilityandthefastdevelopmentofInternet,thesecurityofpersonalmessagebecomesdangerousmoreandmore.Althoughtheconventionaldataencryptiontechniquesmaybepartiallypreventtheworkbeunauthorizedreleased.almostallthedataencryptiontechnologiesarecrisiswiththerapidenchanceoftheedcipheringtechnique.Theprotectionofdigitalproductstopreventpircayofintellectualpropertyrightsandbecometheapplicationofdigitalproductsandnetworksarefacinggraveproblems.Asamethodfordigitalmultimediaprotection,digitalwatermarkinghasdevelopedrapidlyinrecentyearsandithasbeenregardedaseffectivesolutiontosolvethesecurityprolbemofmultimedia.Digitalwatermarkingisusedforcopyrightprotection,authenticationofmultimediaandsoon.However,currentlyavailablevideowatermarkingtechniqueisfarbeyondmatureyetcomparedwiththestillimagewatermarking.ThisthesisfocusedonvideoauthenticationwatermarkingalgorithmincludingcontentauthenticationandcompleteauthenticationbasedonMPEG-4.Experimentsareperformedtotesttheeffectivenessofproposedalgorithms.Themainresearchworkandcontributionsofthisthesisaresummarizedasfollows:FirstFirstofall,digitalwatermarkingtechnologytomorecomprehensiveoverviewonthestatusofdigitalwatermarkingtechnology,classificationandapplication,andintroducedthewatermarkingtechnologyfordigitalvideofeaturesandIIIvideofeaturesandvideoauthentication,videoauthenticationtechnology,aswellastheclassificationofvideoauthenticationtechnologyandimplementation.SecondAvideobasedontherelationshipbetweenenergycontentauthenticationalgorithmadaptivepatterncharacteristicofvideocontentidentificationstadardstoimprovethewatermarkingalgorithm,selecttheuniformtextureoftheregiondoesnotincreasethevisibilityofthewatermarktoenhancetherobustnessofalgorithms,combinedwithvideocodecstandardsrealizationofwatermarkembeddingandextraction,greatlyenhancetheefficiencyofalgorithmimplementation.ThirdbytheSpreadspectrumcommunicationtheoryinspired,Theimpactofthetraditionalwatermarkembeddingtechnologybythegeneralimageprocessingoperationbytheimpactofthisproblemcaneasilybelostwatermark,adigitalwatermarkingschemebemadebasedSpreadspectrum.Theproliferationoftraditionalwatermarktoawidefrequencyrange,isthefrequencyunitinanyoftheenergyareveryweakandalmostcannotbefound,cleverlysolvedthewatermarkisnothowtotheproblem.ofmaintainvisibility.KeyWordsdigitalwatermarking,copyrigheprotection,videowatermarking,viedoauthentication,contentauthentication,Spreadspectrum1______2111.121.2W3{}ˆ()|(),dWwkwkBkW=∈∈1.1ˆdWdd=123B={01}B={-11}X,W,K,G,ξ,DXWKGKXGW=G(X,K)1.2ξWXξXw=ξX0W1.3X0XwDD'(,)WWDXK=1.4'1'0if∈=1.5'WD()4RTGTR=•1.6:,:RkWTWXKW−××−%%1.7RW%KTWT0(,)(,)(,')wWTWXTWXTWX==%%%%%1.80XwX'(),~=M1.1W={w(k)}{}()OOXxk=0()()()()wxkxkhkwk=⊕(1.9)⊕H={h(k)}d123()()()woxkxkawk=+(1.10)WXXWK5:0()()(1())wxkxkawk=+(1.11)1.2GDIII1.21.3[3]1.2.3.robustness4.securityK61.41.2.37DVD41.5IVOP8:922.1JPEGJPEG1993JPEGDPCMDCT2.1.1JPEG2000JPEGJPEG20002.1.1DCT2.1.2DCT10MPEG1988ISOIECMPEGMPEGMPEGMPEGMPEGMPEG-1,MPEG-2MPEG-3MPEG-4MPEG2.1.1MPEG-2MPEGMPEG-2MPEG-1ISO/IECITUMPEG-1MPEG-2MPEG-2100Mbit/s,HDIVDVDSDTVHDTVMPEG-22.1.1MPEG-2SNR_______80Mbps______________100Mbps1440_______60Mbps_______60Mps80Mbps15Mbps15Mbps15Mbps_______20Mbps_______4Mbps4Mbps_________________MPEG-211MPEG-22.1.1MP@MLSDTVMP@HLHDTV2.1.2MPEG-2MPEG2.1.3MPEG-2MPEG-2IPBIPBPBBMPEG-212MPEG-2z16×16zDCT:DCTDCT8×8DCTzDCTDCTzDCT8×8Zig-ZigDCTQVLCQ-1DCT-Q:VCL:2.1.3MPEG-213zDCTzz2.1.3ACDC2.2.3142.1.3MPEG-2MPEG-2p[y][x]P[y][x]2.1.4MPEG-2MPEG-2/Vector[r][s]t[f[y][x]P[x][y]d[y][x]F[v][u]F[y][x]DCTQF[n]QFS[n]d[y][x]15DCT2.22.2.11.Kerchoff2.3.4.2.2.2162.2.32.2.12.2.111001(,)MNxyYfxyMN−−===×∑∑MSE211(,)(,)MNxyfxygxyMSEMN===×∑∑PNSR225525510lg10lgPNSRMSEMSE==MPNSR______25510lg,MPNSRLUT=11______001[(,)(,)]NMyxLUTfxyfxyLUTMN−−==−=×∑∑20()didixTLUTxxxT∀=∀=NC110011110000(,)'(,)(,)(,)'(,)'(,)MNijMNMNijijwijwijNCwijwijwijwij−−==−−−−====×=××∑∑∑∑∑∑172.2.4Craver2.2.22.2.2&4444224204/3,16/9NTSCPALSECAM2530182.32.3.12.3.12.3.22.3.12.3.2192.3.22.3.3“”“”2.3.32033.1[40]3.1LinQYChangJPEGMPEG-1/2DCT[33]DEW3.121IPMPEG-1/2DEW3.2161642420664DCTDCT2ELXELY22ii0,0,icicXYiXiYELELθθ======∑∑3.1iθDCTiDCTzig-zagi{}[0,63]|()iiC∈≤,C20CXYELEL,jWXYELEL,jW=1XYELEL,jW=0,XYELEL22{}01,||max(||),0,[0.63]0,||max(||)iiiiiiiθαθαθθαθ===∈≥3.263,0,1(/64)4,iXYiδβαδ===≤∑∑3.3αδδ=0.22α=0.13β01β0β13.200iθ==3.33.3.1DCT(3.1)XY636322i,,iiXYiicxicYEHEHθθ======∑∑CDCTYXD=XEH-YEH0XYIf1&&XEH≥Tfor(i=c;i=63;i++){iDCT}elseif(0&&YEH≥T)for(i=c;i=63;i++)23{iDCT}363201(),{[0,1]}464kikicTcλθλ===∈−∑∑TYEHXEHT3.3.2VLCXEHYEH,jw=1ELXELYWj=0.1ELXTEHYT,2XEHT≥0YEH=jW=1jW=03XEH=0YEH≥TjW=0jW=14XEHT≥YEH≥TIIIPBIPB243.23.2343.4.11CIF:football(450176×144lina150176*144picture(450176*144C++Builder6.03.3MPEG425PSNR36dBDEWPNSR35-434-5dBfootball,lina,picture3.3.23.3.1PSNR/dBmisssuziesalesmanDEW36.561839.451735.914740.612343.543539.92313.3.2football203KB203KB203KBlina350KB350KB350KBpicture861KB861KB861KB3.4.2P42.0GHz512MWindowsX