基于低比特率語音算法MCU的設(shè)計與實現(xiàn).pdf

1、北方工業(yè)大學(xué)碩士學(xué)位論文基于低比特率語音算法MCU的設(shè)計與實現(xiàn)姓名：夏日升申請學(xué)位級別：碩士專業(yè)：信號與信息處理指導(dǎo)教師：張常年20070528北方工業(yè)大學(xué)碩士學(xué)位論文ABSTRACTSpeechCodingistakinguseoftheredundancybetweenspeechesandtherestrictofeartogetridoftheunnecessaryinformationandattainthegoalteduc

2、ethebitratesorstoragecapacity。Inthepaperwejustrealizethecompressionofspeechaccordingtothesetwocharactersthecontentofthepaperistocompletetheirrealizationsinsoftwareandhardwarerespectively。Firstweintroducethetheoryofwaveco

3、dinganddescribethetheoryofADPCMandtheprocessofitsrealization；thenwesimulateitinsoftwareVC60。Basedonthis，IntegratedCircuitisdesignedinVerilogHDLforthisalgorithm；Inaddition，thecircuithaspassedthesimulationverificationandte

4、stingusingsoftwareModsimSE61；finallywesynthesizethecircuitinSynplifyPro73anddiscussthequestionsindesignandprocessofsolvingproblems。Duetotheconstrainofbitrateforthisalgorithm，itmainlyappliestotheoccasionswhichrequirehigll

5、qualityforspeeeh。mtheotherhandwedeeplyanalyzethecriticaltechnologyofparametercodingalgorithmandspeciallydiscussthetheoryofACELPandthefunctionsofanpartsduringthisweanalyzetheperformanceefficiencyforthoseimportantpartsando

6、ptimizetheprogramcodewhichprovidethefoundationforthefollowingrealizationinhardware；ThenwesimulateitinsoftwareandcomparetheresultsbetweenADPCMandACELPandexpressthereasonsandanalyzethemfortheirdifferences。Inthelastpartwedi

7、scussthehardwarerealizationforACELPinhardwaredesignwhichisbasedonIPCCORE；Severalinstructioncyclesaleneededwhenitexecutesmultiplyoperationwhileinthisalgorithmmul自iplyoperationoccupiesbigproportionsSOwedesignaspecialmultip

8、lycircuit。MorcoveragreatmanyprogramsareoptimizedtoimprovetheefficiencyinHardware。Ultimatelywecompletetherealizationinhardware；butinordertosatisfytheapplicationinpracticemoreworkllccdstobedone。‘Keywords：SpeechCodingLinear