低速率MELP语音编码算法分析与DSP实现

《低速率MELP语音编码算法分析与DSP实现》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、重庆邮电大学硕士论文IIAbs仃actW池medevelopm肌tofcomm疵cationtecllll0109yatso11i班speecll'mep砒1唧t0lackof矗跚uencyresourCesbecomeInore肌dmorepromiIlent，especiallyiIlmeareaofvoice仃ansIIlissionandvoicestomge．iI’llereforc，howtoreducetIle仃；mSmissionofspeechsi弘2LlbaIl捌dtllandstoragec印aC时haSbeeIlmeta玛etofscholars，ands

2、peeChcodiI培techn0109yplaysalliII】ponalltroleinaClli砒lgtllis90a1．speechcodiIlgtcChnologystiUoccupiesa11ilIlport锄tpositioninmod锄co删mlIlications)rst锄，andmelowbitratespeechcodingisam血researchdi删ion．Tllisp印erconCenls0nmep血cipleandkeyteclm010舀esof而xcdexcit撕on1iIlearprediction《Ⅶ正P)SpeeChcompressionc

3、odecalgoriⅡlIll．Desi印aVe巧10wratecodiIlgschemewllichcodi】唱rateislowerⅡlall1kbpsb弱cdonMELPandmul廿觑吼ejonquantit撕VetecllIl010黟111ema湖ycompletedwork嬲follows：7mspaperdiscussesmercsearchsi班丘cancecoII】lbilled谢mmeapplic撕onbac：k伊ouIldofspeechcodir培．Setsf．0mlmespeechcodingalgorimm’sprinCiple，cl弱si丘catio

4、n，pe而mlanCeevaluationme血odsandmedeVelopmentofstatusquoilldctail．hl仃oduces丘vekiIldsoflowbitratespeechco血galgoritllmsmatarecomrnoIllyused．TheUnitedStatesfederalstaIld枷2．4kbpsⅧLPvocodercombiIlesmcadv嘶sof位血tion2dlylinearpre(1iction(LPC)VocoderandInultibaIldeXcitation(MBE)a190rimm．Furmennoremeyadd

5、somenewtecllIl010百est0enhancet11ea190rimm，such嬲hybridexci切脏on，印嘶odicpulses，ad印tiVeSpectrLIIIleIlllaIlcement，pulsedispersion丘nerandresi血mh舭noIlic锄plitudemodel．Theperf．omanCeofmesyIlm舐cspeeChgot舶m2．4kbpsMELPcodecalgoritllmisrespectiVelytestedbomin6bjectiVe趾dsubjective．Ononehand，coInparedmewaVef

6、omand丘。equencySpec饥瑚．ofsynthetic／0ri咖alspeechsi弘a1matc肌getmeobjectiveeValu撕on．0111tlleomerhand，wecallget州ec仉eevahIationbyme雒u血gtheMOSValueoftlles弘lmesizedspeechsignal．h1仃0duciIlgpitchsmooⅡl，balldp嬲svoicesmoomaIldaIliIIlpr0Vedhybridexcitationmetllodt00ptiIIlizethealgorimm．TheimproVedhybridexci

7、协0ngeIlerafionmemodisappliedtomest锄dard2．4kbpsMELPalgoIi廿lIn．Thetestresuhss110wmatt11esyIlmesizcdspeech删时isiInpr0Vedob访ously．B硒edonmest肌dard2．4kbpsMELPa190rithm，Ⅱ1ispapereXploitmeshorttiIIlest撕onad够ofspeechsi印al，meiIlter-肋meredlmdaIlcyandimro