语音变化分析及其在孤立词识别中的应用

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1、浙江大学计算机科学与技术学院硕士学位论文语音变化分析及其在孤立词识别中的应用姓名：魏春明申请学位级别：硕士专业：计算机应用技术指导教师：杨莹春20100301浙江大学硕士学何论文摘要关键词：语音变化，通道特性，说话人情感，鲁棒性，孤立词识别技术，系统应用浙江火学硕士学位论文AbstractAutomaticspeechrecognitiontechnologyhasmadegreatprogressforthepastfewyears．Alongwiththespreadingofcomputer,laptopandportabledevicesuchasc

2、ellularphone，especiallythepopularizationoftheIntemet，kindsofapplicationsbasedonspeechrecognitionhavesprungup．Specifically,becauseisolatedwordrecognitionhastheadvantagesofhighcomputingefficiency,lowstoragespaceandeasyimplementation，especiallyinsmallvocabulary,itispopularinspecialare

3、as．Althoughtheautomaticspeechrecognitionsystemperformswellinthelabenvironment，itsperformancedegradesalotintherealapplication，whichiscausedbytransmissionchannel，backgroundnoise，speakercharacteristicsandSOon．Hence，thespeechvariabilityanditseffectonspeechrecognitionsystemhavearousedth

4、einterestsofacademiaandindustry．Surveyingthespeechvariability,isolatedwordrecognitionandrobustspeechrecognition，weanalyzethevariabilityoftransmissionchannelandspeakeremotionstateonseveralcorpuswithtransmissionchannelandspeakercharacteristicsvariability,andtrytofindtheeffectsoftrans

5、missionchannelandspeakeremotionstateonspeechrecognitioninfeature，modelandscoredomainrespectively．InthetemplatebasedandHiddenMarkovModel(HMM)basedisolatedwordrecognitionframeworks，robustspeechrecognitiontechnologyisexplored．Inthetemplatebasedisolatedwordrecognitionsystem，pkchcontour

6、remedyalgorithm，templateselectionbyclustermethodandcommonvectorapproachareemployedtoimprovetherobustnesstospeakeremotionvariability．IntheHMMbasedisolatedwordrecognitionsystem,cepstralmeansubtractioninthefeaturedomainandscorenormalizationinthescoredomainareadoptedtoimprovetherobustn

7、esstotransmissionchannelvariability．Accordingtotheexperimentresuks，theseapproachesimprovetherobustnessoftheisolatedwordrecognitionsystem．Finally,weapplytherobustisolatedwordrecognitiontechnologytodeveloppreliminarysystemapplications．Thisthesismainlyfocusesonthefollowingwork：iii浙江大学

8、硕士学位论文Abstract1．Constructi