PRONUNCIATION VARIATION MODELLING IN A MODEL OF HUMAN WORD RECOGNITION

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1、PRONUNCIATIONVARIATIONMODELLINGINAMODELOFHUMANWORDRECOGNITIONOdetteScharenborgandLouBoves2ART,DepartmentofLanguageandSpeechUniversityofNijmegen,TheNetherlands{O.Scharenborg,L.Boves}@let.kun.nlphonetictranscriptionsoftheacousticsignal,eveniftheseareABSTRACTmadebyexpertphoneti

2、cians,becauseoftheinsertion,deletion,Duetopronunciationvariation,manyinsertionsanddeletionsandsubstitution‘errors’.ofphonesoccurinspontaneousspeech.ThepsycholinguisticIdeally,thetranscriptiongeneratedbytheAPRshouldmodelofhumanspeechrecognitionShortlistisnotwellabletodescribe

3、theacousticsignalaspreciselyaspossible.However,dealwithphoneinsertionsanddeletionsandisthereforenotsuchatranscriptionwillprobablynotbethebestpossibleinputwellsuitedfordealingwithreal-lifeinput.TheresearchforShortlist,sinceitcontainsinsertionsanddeletionsinpresentedinthispape

4、rexplainshowShortlistcanbenefitfromcomparisonwiththephonemicrepresentationsofthewordsinpronunciationvariationmodellingindealingwithreal-lifetheinternallexiconofShortlist.input.Shortlist’sproblemconcerninginsertionsanddeletionscanPronunciationvariationwasmodelledbyincludingva

5、riantsbeapproachedfromtwodirections.OnemaytrytofindtheintothelexiconofShortlist.Aseriesofexperimentswasoptimalbalancebetweengeneratinganinputphonemestringcarriedouttofindtheoptimalacousticmodelsetforthatisclosetothesignalandgeneratinganinputphonemetranscribingthetrainingmate

6、rialthatwasusedasbasisforthestringthatcontainstheleastpossiblenumberofinsertionsandgenerationofthevariants.deletions.Alternatively,ShortlistcouldbeadaptedsothatitisTheShortlistexperimentsclearlyshowedthatShortlistcapableofdealingwithaccuratephonetictranscriptions.Inthisbenef

7、itsfrompronunciationvariationmodelling.However,thepaper,weinvestigatethesecondapproachbymodellingperformanceofShortliststaysfarbehindtheperformanceofpronunciationvariationinthelexiconofShortlist.Thispaperother,moreconventionalspeechrecognisers.describesthegenerationofthepron

8、unciationvariantsandtheeffectofaddingpronunciationvariantstothelexiconof1.I