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UnitSeven;GroupDiscussion;GroupDiscussion;GroupDiscussion;Identifyingsignaltransmission;KeystoPre-reading;Thedefinitionofsignalprocessing
Thehistoryofsignalprocessing
Twotypesofsignalprocessing
Theapplicationsofsignalprocessing;SignalProcessing;Thehistoryofsignalprocessing
Theprinciplesofsignalprocessingcanbefoundintheclassicalnumericalanalysistechniquesofthe17thcentury.OppenheimandSchaferfurtherstatethatthe“digitalization”ordigitalrefinementofthesetechniquescanbefoundinthedigitalcontrolsystemsofthe1940sand1950s.Itwasinthe1960sthatadisciplineofdigitalsignalprocessingbegantoform.
;DefinitionofSignal.Classification;AccordingtotheIEEETransactions,“Signal”includesaudio,video,speech,image,communication,geophysical,sonar,radar,medicalandmusicalsignals.Suchsignalsareoftwomaintypes:analog,wherethesignalsarecarriedbycontinuouslyvaryingquantities,anddigital,wherethesignalsarerestrictedtoafinitesetofdiscretevalues(oftenjusttwo,symbolizedby0and1).;Twotypesofsignalprocessing;Analogsignalprocessing;Digitalsignalprocessing;ApplicationsofDSPincludeaudioandspeechsignalprocessing,sonar,radarandothersensorarrayprocessing,spectralestimation,statisticalsignalprocessing,digitalimageprocessing,signalprocessingfortelecommunications,controlofsystems,biomedicalengineering,andseismicdataprocessingandsoon.;Theapplicationsofsignalprocessing
Theapplicationsofsignalprocessinginfluenceourlivesinmanyways.Forexample,everytelephone,smartornot,reliesheavilyonspeechprocessingtechniquestomakevoicecommunicationbetweentwo(ormore)peoplepossible.Fromanalog-to-digitalconversiontospeechenhancement(filtering,echo-,noise-,andautomaticgaincontrol)tospeechencodingonrecordingsidetospeechdecodingtospeechenhancementtodigital-to-analogconversiononthe
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