孤立词语音识别技术的研究与DSP实现

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1、西南交通大学硕士学位论文孤立词语音识别技术的研究与DSP实现姓名：魏阳申请学位级别：硕士专业：通信与信息系统指导教师：王建英20060401西南交通大学硕士研究生学位论文第1I页ABSTRACTSpeechrecognizationisoneofthebasements0fthepersonnal—mechiancOmmunication．SpeechrecognizationtechnologyhasbeenimproVedrapidlyfromthemiddleoflastcentury．Thespee

2、chrecogIlizat幻ntechnologyhasbeenappHedtothejIldustry∞n“ol，cOmmunication卜andconsumptiDnareabroadly．Therefore，tlleresearchofthespeechrecognitiOnismeaningfulandtheapplicationfore鲈oundisexPansiVe．AIgOrithm0fthesystem，thehardwaredesjgnandthesoftwaredesignwereex

3、pandedoⅡ．Theanalyticalandprocessfbundationknowledgeofthespeechsignalwereintroducedfirst．AndgofⅡrther，thefundamentaltheoryofspeechrecognitionwasdiscussedparticulady．PeculiarityandarchitectureOftheDSPTMS320VC5402wasintroduced，andthespeechrecognitjonsystemwas

4、raised．HowtodesignthecircuitbasedontheTMS320VC5402wasresearched，aIldtheconsistofthesystemandhowtheprocessOfthesystemworkswasdiscussed．AIlaloganddigitalconVertisperformedbyTI．：V320AIC23，trainingandrecognizingofthespeechsignalareperformedbyDSP，aUthe109iccont

5、rolisperfomledbymecPLDchipEPM7032AE，theresultoftherecognitionwillbeoutputfinally．ContraposjtiVely，westudjedthepanicularnessoftheChinese，theprocedureofthesoftwaredesignwasintroduced．’Imeprocedureindudeofpre-processing，startandendpojntdetecting，featurevalues

6、election，pattemmatchingandthetrainingofthefbrmwork．Startandendpointdetectionisthemostcriticalstep，wecarriedoutitwithshort—timeaverageenergy，Thefeaturevalueusedinrecognitionisshorf-timeaVerageenergy．Asystemwewilldesignshouldrecognizeaparticularspeechofapart

7、icularperson，andthetimeconsumedshouldbemoreIess，thetimedom鲥ncharacte—sticweusedonly．ThekernelalgorithmisDTw(Dynamictimewarpin曲，theaIgorithmhasbeencertifiedtobeefficient，andagoodresulthasbeenachieved．西南交通大学硕士研究生学位论文第1II页l【eywol诅s：speechrecognition；short—tim

8、eaverageenergywarping(DrW)；di西talsign“processor西南交通大学硕士研究生学位论文第1页1．1课题的背景及意义第1章绪论语音是人类相互间进行通信的最自然和最方便的形式，语音通信是一种理想的人机通信方式。语音通信的研究涉及到人工智能、模式识别、数字信号处理、微机技术、语言声学、语言学和认知科学等许多学科领埘”，是一个多学科的综合性研究领域，其研究成果具有重要的学术价值和应用