标签: overlap-add

ThischapterpresentstwoimportantDSPtechniques,theoverlap-addmethod,andFFTconvolution.Theoverlap-addmethodisusedtobreaklongsignalsintosmallersegmentsforeasierprocessing.FFTconvolutionusestheoverlap-addmethodtogetherwiththeFastFourierTransform,allowingsignalstobeconvolvedbymultiplyingtheirfrequencyspectra.Forfilterkernelslongerthanabout64points,FFTconvolutionisfasterthanstandardconvolution,whileproducingexactlythesameresult.CHAPTERFFTConvolution18ThischapterpresentstwoimportantDSPtechniques,theoverlap-addmethod,andFFTconvolution.Theoverlap-addmethodisusedtobreaklongsignalsintosmallersegmentsforeasierprocessing.FFTconvolutionusestheoverlap-addmethodtogetherwiththeFastFourierTransform,allowingsignalstobeconvolvedbymultiplyingtheirfrequencyspectra.Forfilterkernelslongerthanabout64points,FFTconvolutionisfasterthanstandardconvolution,whileproducingexactlythesameresult.TheOverlap-AddMethodTherearemanyDSPapplicationswherealongsignalmustbefilteredinsegments.Forinstance,highfidelitydigitalaudiorequiresadatarateof……