g.729編碼算法的研究及其基于dsp的優(yōu)化實現

1、分類號——密級單位代碼!Q12學號～20022454一西北大學碩士學位論文題目魚!!星壁編碼篡法毆班塞殛甚基王衛(wèi)望數位絲塞班作者虛掩鹼指導教師堡撿盍技術職務——塾蟄撞學科(專業(yè))——墊整當盤絲——答辯目期一一學位授予日期～二零零五年五月西北大學碩十學位論文AbstractWiththerapidprogressofmordenmobilecommunication，thebandwidthutilizationandspeechqual

2、ityarebecomingthemainproblemThevalidapproachtOsolvethisproblemislowrate，delay，lossandhighqualitycodecTomeetsuchrequirement，lTUhasenactedG729protocolin1996G729iSbasedonCSACELPat8kbit／sandhastheadvantageoflowdelayhighspeec

3、hqualityItcanbewidelyusedinthefieldofindividualmobilecommunication，multimediacommunication，IPphone，satellitecommunicationISDNandSOonItiSrecommendedtothetelecomdepartmentallovertheworldbytheITU，butitisdifficulttorealizein

4、realtimebecauseofthehi曲algorithmiccomplexityWiththerapidlydevelopingofDSPtechnologyinrecentdecades，thecomputationalcapabilityofthechipisgraduallyimproved，andthechipcostisreduced，SOtheDSPhasbecomethemaintoolinthefieldofsp

5、eechsignalprocessingguadually，andmakeitbecomepossibletorealizethemorecomplexcodeealgorithminasinglechipInthispaperbasedongraspingtheprincipleofG729，hardwaredesignandseveralsoftwareoptimizationtechniquesarepresentedforeff

6、icientimplementationofG729standardThemainworkisfollow：(1)Basedontheprincipleof(3729andplentyofliteratures，thealgorithmdetailshavebeenresearcheddeeply(2)AccordingtotherequirementofmemoryandrunningspeedforG729implementatio

7、n，thehardwareplatformisdesigned(3)AftertheanalysisingofG729flowthepeakvalueofcalculationisestimatedForefficientimplementationofCl729，severaloptimizationtechniquesarepresentedonthelevelofClanguage、assemblyandalgorithmespe