标签: compression

StandardCodecs-ImageCompressiontoAdvancedVideoCoding,IEEEPress

DataCompression-TheCompleteReference,3rdEdition

1dBCompressionPointSheet1of17LinearityActiveRFdevicesareultimatelynon-linearinoperation.WhendrivenwithalargeenoughRFsignalthedevicewillgenerateundesirablespurioussignals.Howmuchspuriousgeneratedbythedeviceisdependantonthelinearityofthedevice.Ifanamplifierisdrivenhardenoughtheoutputpowerwillbegintorolloffresultinginadropofgainknownasgaincompression.Themeasurementofgaincompressionisgivenbythe1dBgaincompressionpoint.1dBCompressionPointThisparameterinanothermeasureofthelinearityofadeviceandisdefinedastheinputpowerthatcausesa1dBdropinthelineargainduetodevicesaturation.Anexampleofthe1dBcompressionpointisshowninfigure2.3025SaturatedOutputPower21dBm201dBCompressionPoint20dBm……

VideoCompression:SystemTrade-OffswithH.264,VC-1andotherCodecs……

DigitalSignalProcessingisoneofthemostpowerfultechnologiesthatwillshapescienceandengineeringinthetwenty-firstcentury.Revolutionarychangeshavealreadybeenmadeinabroadrangeoffields:communications,medicalimaging,radar&sonar,highfidelitymusicreproduction,andoilprospecting,tonamejustafew.EachoftheseareashasdevelopedadeepDSPtechnology,withitsownalgorithms,mathematics,andspecializedtechniques.ThiscombinationofbreathanddepthmakesitimpossibleforanyoneindividualtomasteralloftheDSPtechnologythathasbeendeveloped.DSPeducationinvolvestwotasks:learninggeneralconceptsthatapplytothefieldasawhole,andlearningspecializedtechniquesforyourparticularareaofinterest.ThischapterstartsourjourneyintotheworldofDigitalSignalProcessingbydescribingthedramaticeffectthatDSPhasmadeinseveraldiversefields.Therevolutionhasbegun.CHAPTERTheBreadthandDepthofDSP1DigitalSignalProcessingisoneofthemostpowerfultechnologiesthatwillshapescienceandengineeringinthetwenty-firstcentury.Revolutionarychangeshavealreadybeenmadeinabroadrangeoffields:communications,medicalimaging,radar&sonar,highfidelitymusicreproduction,andoilprospecting,tonamejustafew.EachoftheseareashasdevelopedadeepDSPtechnology,withitsownalgorithms,mathematics,andspecializedtechniques.ThiscombinationofbreathanddepthmakesitimpossibleforanyoneindividualtomasteralloftheDSPtechnologythathasbeendeveloped.DSPeducationinvolvestwotasks:learninggeneralconceptsthatapplytothefieldasawhole,andlearningspecializedtechnique……

Datatransmissionandstoragecostmoney.Themoreinformationbeingdealtwith,themoreitcosts.Inspiteofthis,mostdigitaldataarenotstoredinthemostcompactform.Rather,theyarestoredinwhateverwaymakesthemeasiesttouse,suchas:ASCIItextfromwordprocessors,binarycodethatcanbeexecutedonacomputer,individualsamplesfromadataacquisitionsystem,etc.Typically,theseeasy-to-useencodingmethodsrequiredatafilesabouttwiceaslargeasactuallyneededtorepresenttheinformation.Datacompressionisthegeneraltermforthevariousalgorithmsandprogramsdevelopedtoaddressthisproblem.Acompressionprogramisusedtoconvertdatafromaneasy-to-useformattooneoptimizedforcompactness.Likewise,anuncompressionprogramreturnstheinformationtoitsoriginalform.Weexaminefivetechniquesfordatacompressioninthischapter.Thefirstthreearesimpleencodingtechniques,called:runlength,Huffman,anddeltaencoding.Thelasttwoareelaborateproceduresthathaveestablishedthemselvesasindustrystandards:LZWandJPEG.CHAPTERDataCompression27Datatransmissionandstoragecostmoney.Themoreinformationbeingdealtwith,themoreitcosts.Inspiteofthis,mostdigitaldataarenotstoredinthemostcompactform.Rather,theyarestoredinwhateverwaymakesthemeasiesttouse,suchas:ASCIItextfromwordprocessors,binarycodethatcanbeexecutedonacomputer,individualsamplesfromadataacquisitionsystem,etc.Typically,theseeasy-to-useencodingmethodsrequiredatafilesabouttwiceaslargeasactuallyneededtorepresenttheinformation.Datacompressionisthegeneraltermforthevariousalgorithmsandprogramsdevelopedtoaddressthisproblem.Acompressionprogramisusedtoconvertdatafromaneasy-to-useformattooneoptimized……

【应用笔记】无引线倒装芯片球栅阵列的热处理和机械处理(ThermalManagementandMechanicalHandlingforLidlessFlipChipBall-GridArray)本应用笔记对Altera的器件的无引线倒装芯片球栅阵列(flipchipball-gridarray,FCBGA)的热处理和机械处理提供指导。Thisapplicationnoteprovidesguidanceonthermalmanagementandmechanicalhandlingoflidlessflipchipball-gridarray(FCBGA)forAltera®devices.ThermalManagementandMechanicalHandlingforLidlessFlipChipBall-GridArrayAN-659-1.0ApplicationNoteThisapplicationnoteprovidesguidanceonthermalmanagementandmechanicalhandlingoflidlessflipchipball-gridarray(FCBGA)forAlteradevices.Thisapplicationnoteincludesthefollowingsections:……

Abstract:Toenableanaudioamplifiertoaccommodatebothloudandsoft-spokenvoiceswithoutclippingtheloudwaveforms,youcanimplementanonlineartransferfunctionbyaddingafewcomponentstoastandardapplicationcircuit.Maxim>AppNotes>AmplifierandComparatorCircuitsAudioCircuitsKeywords:audioamplifiers,nonlineartransferfunctions,gaincompressionDec22,2010APPLICATIONNOTE4551SimpleCircuitLimitsAmplifier'sOutputAbstract:Toenableanaudioamplifiertoaccommodatebothloudandsoft-spokenvoiceswithoutclippingtheloudwaveforms,youcanimplementanonlineartransferfunctionbyaddingafewcomponentstoastandardapplicationcircuit.AsimilarversionofthisarticleappearedintheAugust16,2007issueofElectronicDesignmagazine.Amplifyingthehumanvoicepresentstoughchallenges.Oneofthetoughestisprovidingenoughamplificationtomakeasoft-spokenpersonunderstoodwhileallowingsuff……

摘要：为了使音频放大器容纳不裁剪大声波形都大声说话轻声细语的声音，你可以实现一个非线性传递函数由几个组件添加到一个标准的应用电路。Maxim>AppNotes>AmplifierandComparatorCircuitsAudioCircuitsKeywords:audioamplifiers,nonlineartransferfunctions,gaincompressionDec22,2010APPLICATIONNOTE4551SimpleCircuitLimitsAmplifier'sOutputAbstract:Toenableanaudioamplifiertoaccommodatebothloudandsoft-spokenvoiceswithoutclippingtheloudwaveforms,youcanimplementanonlineartransferfunctionbyaddingafewcomponentstoastandardapplicationcircuit.AsimilarversionofthisarticleappearedintheAugust16,2007issueofElectronicDesignmagazine.Amplifyingthehumanvoicepresentstoughchallenges.Oneofthetoughestisprovidingenoughamplificationtomakeasoft-spokenpersonunderstoodwhileallowingsuff……

VLSIarchitecturesforvideoc...,VLSIarchitecturesforvideocompression……

MPEG4&H.264VideoCompression,H264&MPEG4videocompression……