基于ARM嵌入式處理器的實(shí)時(shí)錄音編碼研究與實(shí)現(xiàn).pdf

1、分類(lèi)號(hào)：TN432密級(jí)：公開(kāi)UDC：6213學(xué)號(hào)：020652Ft。SU715東南大學(xué)碩士學(xué)位論文基于ARM嵌入式處理器的實(shí)時(shí)錄音編碼研究與實(shí)現(xiàn)研究生姓名：塑睦導(dǎo)師姓名：睦生墊熬授中請(qǐng)學(xué)位級(jí)別王堂亟學(xué)科專(zhuān)業(yè)名稱(chēng)煎電生與固佳皇王堂一一論文提交日期星魚(yú)生且盡論文答辯曰期星壘鰻復(fù)墨且】星目學(xué)位授予單位盤(pán)畝盍堂學(xué)位授予日期2Q生且且答辯委員會(huì)主席耋建苤：論文評(píng)閱人基匭明昱建齷2003年3月12日Abstractlnthisthesisthere

2、searchanddevelopmentoferealtimesloeschencoderforhandholdterminaIapplicationchip(Garfield)anddevelopamethodforsystemestimationofperformanceandpowerbaseonARMlSSmodelGadield4projectisaSystemOnaChip(SoC)withARM丌DMIascoreproc

3、essorwithoutcacheandincludesotheronchipmodulesIikehighspeedembeddedmemory(eSRAM)andMultimediaAccelerator(MMA)，etc1nthepaper，firstly，introduco∞r(nóng)nealgorithmsforspe目chencoder，andcomparethesealgorithmsofperformanceandcomplex

4、ityThandescribeG729AandG726indotails，Wechoosefixedpointalgodthm，whichmakesFPUorDSPunnecassary，enhancestheencodingperformanceandreducesthesystemcost，describehowtoconversefIoatpointelgorithmtofixedpointSecondlywedooptimiza

5、tiononeveryIevel，Iikeglobal，functional，algortthm，andassemblyofsoftwareitseff；afterthis，wedooptimizationbaseollprocessorandGarfieldchip，suchas。usingembeddedSRAMandhardwareMultimediaAcceleratorWhendonethiswedosystemperform

6、anceastimation(ARM丌DMI，A只M720T，ARM91usinghighIevelCmodeIofEMIandSDRAMbaseonARMISSmodel，thencornparetheresuRofG726baseonARM丌DMIandrealchipGarfieldwefindoutthatthed晰erenceis10％around，soitisusefuIfordevelopingareaIsystem：At

7、thesametime，weanalysistheencodedspeechqualityafteroptimizationofthesetwoelgorithms：AIsoweexplorethepowerconsumptionofG729AusingdifferentmemorylocationandgetagoodmemoryplacementforlowpowerconsumptionBynow，G726hasbeenimpor

8、tedtoGarfield4chipandcompletesthespeechcodingforrealtimeimplantationWhensystemdockis70MHzthespeechcodingcapabilityls36∞Kbytes／sBecauseoftheIowprocessabUityofGarfieldandthecornpiexityofG729AG729AcarlnotreachreaItimeimplem