全球移动通信系统中语音信息隐藏算法的研究

:2006-10-08;:2006-12-31:(11511006):(1972-),(),,,,:;(1981-),(),,,:;(1939-),,,,,:.:1001-9081(2007)04-0841-021,2,2,1(1.,150001;2.,163318)([e-mail]):(GSM),(ABS),,:;;:TP309.7:AStudyonavoicehidingalgorithminGSMcommunicationCHENXue2song1,2,JINQi2shun2,YANGYong2tian1(1.CollegeofComputerScienceandTechnology,HarbinEngineeringUniversity,HarbinHeilongjiang150001,China;2.FacultyofElectricalandInformationEngineering,DaqingPetroleumInstitute,DaqingHeilongjiang163318,China)Abstract:AvoicehidingalgorithmthatcanbeusedinGlobalSystemforMobileCommunication(GSM)wasproposed.Itisspeech2hidingalgorithmbasedontheAnalysis2by2SynthesisEnergyRatio.ThealgorithmisbasedonthetechniqueofAnalysis2By2Synthesis(ABS)andcanadjustadaptivelythestrengthofthesecurityinformationcomponentaccordingtopublicspeechtoachievethebestperformanceofhidingandencoding.Keywords:voicehiding;Analysis2By2Synthesis(ABS);energyratio0,[1],,:[2]:,,,,,:1)(LSB),,;2);3),,;4),,GSM,RPE2LTPRPE2LTP,,GSMRPE2LTPGSM,GSM,GSMRPE2LTP1GSM(ABS[3,4]EnergyRatioAdjust)GSMRPE2LTPABS,,,GSMRPE2LTP,50bit,GSMRPE2LTP,,,,ABS,27420074ComputerApplicationsVol.27No.4Apr.2007RPE2LTP,,,2:1)SGray,qbitX:X={x(i),0iq},x(i){0,1}(1)2)P,PM,:p(k)=p(kL+j),0kK0jL(2)(2),K;L;p(k)kX,qLL1603)pL2,E1=L/2-1j=0(p(kL+j))2(3)E2=Lj=L/2(p(kL+j))2(4)4)xip:(1),1.1(2)L2:1=E2/E1,x(i)=1E1/E21,(5)2=E1/E2,x(i)=1E2/E11,(6)(3)1,2x(i)p:p(kL+j)=p(kL+j)1,0jL/2p(kL+j)2,L/2jL(7)p,pc,pcpd(4)x(i)=x(i),p;x(i)x(i),,(2),,,p,ABS=1.1311)p,L,:p(k)=p(kL+j),0kK0jL(8)2)L2:E1=L/2-1j=0(p(kL+j))2(9)E2=Lj=L/2(p(kL+j))2(10)3),X:X(i)=1,E1E20,E2E1(11)X14,8kHz,16bits,S91000L160,1.1(845)2482007,23)1mj=y=-i,0i,jm-1,log=(mj+i)modn2mj=y=i,1i,jm,log=(mj-i)modn4)1,25)1,(O(m))2,,O(1)11m,11%-1Euclidean,O(log)O(logm)3m-1m1m2m(m+1)/233,O(mlogm)O(m)O(1)2mm:3m=nô,nG33=mi=1i1m=m+126,,plog,4n,,1,pZ3p4n/2=1modp,log,x=logmodn,=xmodp(n/2)2=n=1modp,n/2=1modpn,n/21modp,n/2=-1modpn/2=xn/2=(-1)xmodpn/2=1modplog,7,,,,,,,:[1]ALFREDJM,PAULCVO,SCOTTAV.Handbookofappliedcryp2tography[M].,,.:,2005.99-101,459-468,527-532.[2]DOUGLASRS.Cryptographytheoryandpractice.Secondedition[M].,.:,2003.193-227.[3]JOHANNESB,DAMIANW.Discretelogarithms:recentprogress[A].InternationalConferenceonCodingTheory,CryptographyandRelatedAreas[C].Berlin:Springer2Verlag,2000.42-56.[4]ANDREWO.Discretelogarithms:thepastandthefuture[J].De2signs,Codes,andCryptography,2000,19(2/3):129-145.[5]CHRISS.Thediscretelogproblem[D].PhD.Thesis,UniversityofToronto,2002.7-9.[6]WADET,LAWRENCECW.Introductiontocryptographywithcod2ingtheory[M].,,,.:,2004.121-122,127-134.[7]MUIRJA,STINSONDR.OnThelowhammingweightdiscretelog2arithmproblemfornonadjacentrepresentations[J].AAECC,2006,16(6):461-472.(842)2,3,,4.109s(9.1104)2964bit5,GSM(ABSEnergyRatioAdjust)ABS,,,GSMRPE2LTP,:[1],.[J].,2003,49(3):313-317.[2],,,.[J].,2006,23(2):76-79.[3]WUZJ,YANGW,YANGYX.ABS2basedspeechinformationhid2ingapproach[J].ElectronicsLetters,2003,39(22):1617-1619.[4],,,.[J].,2002,23(8):99-104.5484: