Overlap Add Method(OAM) and Overlap Save Method(OSM) are algorithms to calculate DFT of very large length Input signals.OAM is calculated by decomposing the input sequence and applying linear convolution to this signal,where as in OSM instead of dividing the input,we divide the output and apply only those input values which are required to calculate this output.
We observed that both methods gave the same output.Both methods requires same amount of computations.These methods are block processing techniques.
We observed that both methods gave the same output.Both methods requires same amount of computations.These methods are block processing techniques.
OAM and OSM are used for calculating output of long sequences
ReplyDeleteCalculated with the help of convolution.
DeleteFFT are not suitable for Long Data sequence hence overlap add and overlap save method is used
ReplyDeleteCan be used only for FIR filters
ReplyDeleteIIR filters have infinite input and hence cannot be operated upon.
DeleteFor IIR filters difference equation is used.
DeleteProcessing is faster because of use of FFT for OAM and OSM
ReplyDeleteThey are block transfering techniques
ReplyDeleteNicely explained
ReplyDeleteThese methods are used for block processing
ReplyDelete