回聲隱藏技術的研究.pdf

1、西北大學碩士學位論文回聲隱藏技術的研究姓名：唐升申請學位級別：碩士專業(yè)：電路與系統指導教師：侯榆青20060601西北大學碩士學位論文AbstractInfomationhjdingisatechnologywtlichembedstheimponalltdataintothedigitalaudio，pictureorvideotohidetIleexistenceforcopyrightidentificationorunderco

2、VercommunicationEchohidingisanimponalltbranchoftheinfomationhidingbasedonaudjosignals，Thisp印erfirstlyimmducesmeconcept，principleaIldcharacteristicofechohidin昌andanalyZesitscurrcmsitllation，d州elopmentaltrendandthekeyTesea

3、Tchpoims111ere啦er，柚adaptivealgorit岫ofechohidingbasedonshort—timeenergycomputingTheo—ginalaudioisfirstdividedimosegmems，andtheenergyofeachsegmentiscomputedThedecayrateofechokemelisadaptivelyadjustedaccordingtoeachsegment’

4、senergyByadaptiVelyadjuStingthedecayrateofeachsegm鋤t，asigni丘cantimpfoVementinaudioqualityisachievedTheproposedmethodismbusttom鋤yanackoperations，suchasnoiseaddition，filterres鋤ple，MPEG3coding／decoding，andsoonOnt|lebasisofi

5、nvestigatingtheanbctionoftheerrorcorrectioncodesonimprovinginfoHnationdetcctionemcicncy，tllispaperjntmducesmeBCHcodeintotheechohiding，whichcandecreasetlleenurrateoftheinf0珊ationdetectionandimprovetherobustabilityofmealgo

6、rithInevidemlySubsequemly，seVeralpnnciplesaregiVenonhowtouseerrorcorrectioncodesmoreefncientlySyncllronizationisoneoftlekeyissuesofinformationhidingbasedonaudiosignalsThecurrentaudioinfbrmation“dingalgorithmslacke行色ctiVe

7、techniquesforsyncllronizationThisp印eralsoa11alyzesthecausationofthesynchronizationproblem，andgiVesasumm撕zationoftllemethodsofworkingforresolVingthesynchronizationpmblem0nthebasisofthis，anovelmethodofechollidingisproposed

8、，whichbasedonspeechsigna】，scharact“points’exmlctionExperimentsshowthatthemethodhasanneabilitytostandagainstthesyncfⅡ℃nizationanack，suchasrandomcroppingK叫Words：EchoHiding，ShorttimeEnergy，AdaptiVe，ErrorCorrectionCode，Synch