视频算法工程视频编解码相关算法及算法移植和优化

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1、AnFPGAimplementationofHW/SWcodesignarchitectureforH・263videocoding?ElectronicsandCommunicationsInthispaper,wepresentanefficientHW/SWcodesignarchitectureforH.263videoencoderanditsFPGAimplementation.Eachmoduleoftheencoderisinvestigatedtofindwhichapproachbetwe

2、enIIWandSWisbettertoachievereal-timeprocessingspeedaswellasflexibility.ThehardwareportionsineludetheDiscreteCosineTransform(DCT),inverseDOT(IDCT),quantization(Q)andinversoquanti/ation(IQ)・RomainingpartswererealizedinsoftwareexecutedbytheNIOSIIsoftcoreproces

3、sor.ThispaperalsointroducesefficientdesignmethodsforHWandSWmodules.Tnhardware,anefficientarchitectureforthe2-DDCT/IDCTissuggestedtoreducethechipsize.ANIOS11CustominstructionlogicisusedtoimplementQ/1Q・Softwareoptimizationtechniqueisalsoexploredbyusingthefast

4、block-matchingalgorithmformotionestimation(ME)・ThewholedesignisdescribedinVHDLIanguage,verifiedinSimulationsmidimplementedinStratixITEP2S60FPGA.Finally,theencoderhasbeentestedontheAlteraNIOSIIdevelopmentboardandcanworkupto120?MHz.Implementationresultsshowth

5、atwhenHW/SWcodesignisused,a15.8-16・5timesimprovementincodingspeedisobtainedcomparedtothesoftwarebasedsolution.ArticleOutline1.Introduction2.BaselineII.263videocoding2・1.Pictureformatandorganization2.2.OverviewoftheH・263videocodingstandard2.2・1・Motionestimat

6、ionandcompensation2.2.2.DCTtransform2.2.3.Quantization2.2.4.Entropycoding3.TheHW/SWcodesignplatform3.1.FPGAplatform3.2.TheNIOSITdevelopmentboard-theHW/SWplatform3.2.1.NIOSIICPU3・2.2・NIOS11custominstructionlogic3.3.TheHW/SWcodesignprocess3・4・UsingembeddedLin

7、uxwithcodesign4.TimingoptimizationoftheIL263encoder4.1.TimingoptimizationpartioningmotionestimationDCTandIDCTquantizationandinversequantization4.2.Hardware/softwareOptimizationinOptimizationinOptimizationin4.2.1.4.2.2.4.2.3.5.DesignenvironmeritandFPGAimplem

8、entationofIL263coder5.1.OverviewoftheSTRAT1XIIFPGAarchitecture5.2.FPGAimp1ementationofH.263videocoder5.2.1.Systemenvironment5.2.2.2_DDCT/TDCTcoprocessorcore5.3・Implementationresults2.ExperimontairesuIt