In this session we studied and practically implemented the commonly used block processing techniques namely OAM(Overlap Add method) and OSM(Overlap save method).The general idea here is that when the input to a digital FIR filter is a very long sequence, performing convolution of the entire signal could prove to be an arduous task.Thus a very efficient way of finding the filter output is by using the linear filtering methods viz. OAM ,OSM wherein we decompose the original input signal and perform linear convolution on each of them individually. OAM and OSM are thus most suitable for processing the real time signals.
Precise explaination
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ReplyDeleteShort and perfectly explained. Thank you Shreyas Padte.
ReplyDeleteConcise!
ReplyDeleteWhich technique is better?
ReplyDeleteOSM can be considered as comparatively faster technique as it doesn't require saving of previous data, but also, the kind of applications these methods are put to use in can prove to be a deciding factor stating which one is better.
DeleteOAM and OSM method are used to find the output of FIR filter
ReplyDeleteIn FIR filter the impulse response h(n) is finite in nature unlike in case of IIR which has an infinite impulse response which would cause the calculations to get tedious and hence these block processing methods are used for FIR filter.
DeleteIn FIR filter the impulse response h(n) is finite in nature unlike in case of IIR which has an infinite impulse response which would cause the calculations to get tedious and hence these block processing methods are used for FIR filter.
DeleteProcessing is faster because of use of FFT for OAM and OSM
ReplyDeleteIt is considered to be a block transfer technique
ReplyDelete