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1、上海交通大学硕士学位论文离散余弦变换的研究与硬件设计姓名：郭向东申请学位级别：硕士专业：电路与系统指导教师：施国勇20070101RESEARCHANDHARDWAREDESIGNOFDISCRETECOSINETRANSFORMABSTRACTDiscretecosinetransform(DCT)andthederivedtransformslikeshapeadaptiveDCT(SA-DCT)andintegercosinetransform(ICT)areadoptedbythemainstreamvideost
2、andardslikeMPEG-2,MPEG-4andAVS.Inthispaper,anin-depthstudyismadeonthesethreetransforms,andsomenewalgorithmsandtheircorrespondingarchitecturesareproposed.First,distributedarithmetic(DA)andaspecificaccumulatorareusedinthedesignofDCTtoachieveahighthroughputupto8pixel
3、sperclock,whichissuitedforhighdefinitionvideocompressionapplication.Second,forthedesignofSA-DCT,boothencodingisintroducedforcoefficientsofDCT,andthedesignconceptofprogrammableprocessorisadoptedtocomputingvarious-lengthDCTwhileanoveltransposedregisterarrayispropose
4、dtoimplementthetransposeoperationnecessaryforSA-DCT.TheproposedSA-DCTcorecostsabout12500gateswiththemaximumpowerconsumptionof2.54mW.Third,amoresimplifiedstructurewith6addersisproposedtoimplementthealgorithmbasedonICT(10,9,6,2,3,1)whichisinventedbyW.K.Cham.Besidest
5、hederivationsofthealgorithms,thedesignideas，architecturesandperformancecomparisonsareshowninthispaperasagoodreferenceforotherdesigners.KEYWORDS:DiscreteCosineTransform(DCT),ShapeAdaptiveDiscreteCosineTransform(SA-DCT),IntegerCosineTransform(ICT),DistributedArithme
6、tic(DA),BoothEncoding图片目录图1MPEG-4的编解码器结构··············································································6[4]图2AVS视频编码器框图··················································································8图3数字集成电路的设计流程··································
7、··········································10图4基于ROM的分布式算法结构图·································································12图5基于加法器的分布式算法结构图································································13图6基4Booth编码············································
8、·················································14图7n比特的4-2压缩器电路结构图··································································17图8采用预计算逻辑的n比特比较器
