基于jpeg2000的小波变换和ebcot的分析和硬件设计

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1、-------基于JPEG2000的小波变换和EBCOT的分析与硬件设计AbstractWiththedevelopmentofInternetandmultimediatechnology,theinformationbecomesmoreandmore,andthelimitedstorageandbandwidthisbecomethebottleneck.Soitisnecessaryfortheeffectiveprocessingandcompressionofinformation.Thelateststillimageco

2、mpressionstandardJPEG2000adoptsDiscreteWaveletTransformandEmbeddedBlockCodingwithOptimizedTruncation(EBCOT),andachievesmuchbettercodingefficiencyandimagequalitythanthetraditionalmethods.Withitsexcellentperformanceandprominentfeatures,JPEG2000willnodoubtbecomethemain-strea

3、mintheimagecompressionfieldinthefuture.ButitishardforhardwareimplementationofJPEG2000.HighattentionispaidtodesignVLSIarchitectureforDWTandEBCOTimplementationwithreal-time,lowareaandenergydissipation.Firstly,thisthesisanalyzestheprocessofJPEG2000encoder.Thenthisdissertatio

4、ndeeplyaccessedthehardwareimplementationtechniquesforDWT,bitplanecodingandbinaryarithmeticcodecusedinJPEG2000.AsfortheVLSIimplementationofdiscretewavelettransform(DWT),therowbasedmethodandparallelarchitectureisadoptedforthe2-DDWT,whichmakesboththetransformspeedandtheeffic

5、iencyincrease.Withcombiningthedata-extensionprocedureinto-----------theDWTcore,thememoryrequirementandmemoryaccessofDWTcanbereduced.Andthearchitecturecanaccomplicemulti-levelDWTforthewholeimageusingonly6rowsofinnersingle-portRAM.Asforthehardwareimplementationofbitplanecod

6、ing,abitplanecoderbasedoncoding-passparallelprocessingispresented.ThethreescanproceduresofthealgorithmforbitplanecodinginJPEG2000isincorporatedintoonescanprocedure.Theacceleratorisefficient,andareaisnotlarge.AsfortheVLSIimplementationofbinaryarithmeticcodec,thebinaryarith

7、meticcodecbasedonthree-pipelinearchitectureispresented,whichimprovestheencodingefficiencywithencodingonedataeveryclock.Atlast,thethreeproposedarchitectureisimplementedinVerilogHDL.Theresultofsimulationandsynthesisoftheproposedarchitectureprovesthedesign.Keywords:DWT；Lifti

8、ngScheme；EBCOT；JPEG2000II-----------硕士学位论文插图索引图2.1JPEG2000编码器结构框图·······························