g.729編碼算法的研究及其基于dsp的優(yōu)化實(shí)現(xiàn)

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