韻律信息在漢語語音識別中的應(yīng)用.pdf

1、復(fù)旦大學(xué)碩士學(xué)位論文韻律信息在漢語語音識別中的應(yīng)用姓名：劉丙哲申請學(xué)位級別：碩士專業(yè)：計(jì)算機(jī)軟件與理論指導(dǎo)教師：李宗葛2002.5.28AbstractThegeneralgoalofthisthesisistomodeltheprosodicaspectsofspe。chtoimprovespeechrecognitionTowardsthisgoal，weinvestigateavarietyofwaysofntilizingpro

2、sodicinformationtoenhancespeechrecognitionperformanceWeex口10reprosodicmodelinginMandarinChineze，whichhasverydifferentprosodiccharacteristicswefirstdevelopedapitchdetectionalgorithm(AMDF&NCCF)andaformantdetectionalgorithm

3、fBasedonLPC)，andthenweincorporatepitchandformantintofeaturevectorIntegrationoftheinformationintothespeechrecognitionframeworkreducedthesyllableerrorratebyO7％forMandarindigitrecognitionWealsoexaminethedurationofMandarinin

4、itialandfinalandthefactorsthathaveinfluencesondurationofsyllablesThenwedevelopedadurationmodelforsyllablebasedongaussianmixturemodelwhichleadtoaO8％reductioninworderrorrateInthisthesis，wemakethefollowingcontributionstothe

5、researchintheareaofprosodicmodeling：(1)Integrationthepitchandformantinformationintofeaturesetforbetterspeechrecognition；(2)allempiricalstudythedurationofsyllableinMandarin，whichinvestigatesthedistributionofsyllabledurati