aaas00-dar-pres

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1、AutomaticSpeakerRecognitionRecentProgress,CurrentApplications,andFutureTrendsDouglasA.Reynolds,PhDLarryP.Heck,PhDSeniorMemberofTechnicalStaffManager,SpeakerVerificationR&DM.I.T.LincolnLaboratoryNuanceCommunicationsPresentedattheAAAS2000MeetingHumans,

2、ComputersandSpeechSymposium19February2000ThisworkwassponsoredbytheDepartmentofDefenseunderAirForcecontractF19628-95-C-0002.Opinions,interpretations,conclusions,andrecommendationsarethoseoftheauthorsandarenotnecessarilyendorsedbytheUnitedStatesAirForc

3、e.NuanceCommunicationsMITLincolnLaboratoryOutline•Introduction(Reynolds)•Generaltheory(Reynolds)•Performance(Heck)•Applications(Heck)•Conclusionsandfuturedirections(Heck)NuanceCommunicationsMITLincolnLaboratoryExtractingInformationfromSpeechGoal:Auto

4、maticallyextractinformationtransmittedinspeechsignalSpeechWordsRecognition“Howareyou?”LanguageLanguageNameRecognitionSpeechSignalEnglishSpeakerSpeakerNameRecognitionJamesWilsonNuanceCommunicationsMITLincolnLaboratoryIntroductionIdentification•Determi

5、neswhoistalkingfromsetofknownvoices•Noidentityclaimfromuser(manytoonemapping)•Oftenassumedthatunknownvoicemustcomefromsetofknownspeakers-referredtoasclosed-setidentification?Whosevoiceisthis????NuanceCommunicationsMITLincolnLaboratoryIntroductionVeri

6、fication/Authentication/Detection•Determinewhetherpersoniswhohe/sheclaimstobe•Usermakesidentityclaim:onetoonemapping•Unknownvoicecouldcomefromlargesetofunknownspeakers-referredtoasopen-setverification•Adding“none-of-the-above”optiontoclosed-setidenti

7、ficationgivesopen-setidentificationIsthisBob’svoice??NuanceCommunicationsMITLincolnLaboratoryIntroductionSpeechModalitiesApplicationdictatesdifferentspeechmodalities:•Text-dependentrecognition–Recognitionsystemknowstextspokenbyperson–Examples:fixedph

8、rase,promptedphrase–Usedforapplicationswithstrongcontroloveruserinput–Knowledgeofspokentextcanimprovesystemperformance•Text-independentrecognition–Recognitionsystemdoesnotknowtextspokenbyperson–Examples:Userselectedphrase,conversationalspeech–Usedfor