标签: early

TheH.264videocodingstandardprovidesconsiderablyhighercodingefficiencythanpreviousstandardsdo,whereasitscomplexityissignificantlyincreasedatthesametime.InanH.264encoder,themosttime-consumingcomponentisvariableblock-sizemotionestimation.Toreducethecomplexityofmotionestimation,anearlyterminationalgorithmisproposedinthispaper.Itpredictsthebestmotionvectorbyexaminingonlyonesearchpoint.Withtheproposedmethod,someofthemotionsearchescanbestoppedearly,andthenalargenumberofsearchpointscanbeskipped.Theproposedmethodcanworkwithanyfastmotionestimationalgorithm.ExperimentsarecarriedoutwithafastmotionestimationalgorithmthathasbeenadoptedbyH.264.Resultsshowthatsignificantcomplexityreductionisachievedwhilethedegradationinvideoqualityisnegligible.……

大多数基于微处理器的系统，以确保正确的操作，需要在上电和掉电的监督，并在进入或退出关机或休眠模式。主管可能只提供了一个上电复位，或它可以提供额外的功能，如备份电池管理，存储器写保护，低线的预警，或软件看门狗（图1）。Maxim>AppNotes>AutomotiveMicroprocessorSupervisorCircuitsKeywords:microprocessorsupervisor,batterybackup,falsereset,poweronreset,powergoodcircuit,resetcircuit,earlywarning,sleepmode,uPsupervisor,Mar13,2000microprocessor,supervisory,supervisorICsAPPLICATIONNOTE655SupervisorICsMonitorBattery-PoweredEquipmentToensurecorrectoperation,mostmicroprocessor-basedsystemsrequiresupervisionduringpower-upandpower-down,andwhenenteringorexitingshutdownorsleepmode.Thesupervisormayonlyprovideapower-onreset,oritmayofferadditionalfunctions,suchasbackup-batterymanagement,memory-writeprotection,low-lineearlywarning,orasoftwarewatchdog(Figure1).Figure1.Afeature-ladenPsupervisor(IC1),withtheh……

【应用笔记】AN519:StratixIV设计指南(AN519:StratixIVDesignGuidelines)Altera的StratixIVFPGA对高端应用而言，在系统带宽和电源效率方面实现一个突破，允许设计师们不折不扣地进行创新设计。Altera®Stratix®IVFPGAsdeliverabreakthroughlevelofsystembandwidthandpowerefficiencyforhigh-endapplications,allowingdesignerstoinnovatewithoutcompromise.AN519:StratixIVDesignGuidelinesMay2009AN-519-1.1IntroductionAlteraStratixIVFPGAsdeliverabreakthroughlevelofsystembandwidthandpowerefficiencyforhigh-endapplications,allowingdesignerstoinnovatewithoutcompromise.ItisimportanttofollowAlterarecommendationsthroughoutthedesignprocessforhigh-density,high-performanceStratixIVdesigns.PlanningtheFPGAandsystemearlyinthedesignprocessiscrucialtoyoursuccess.Thisdocumentprov……