Overlap Add Method and Overlap Save Method
This experiment focussed on filtering of a long input data sequence. Overlap Add and Overlap Save methods are block processing techniques. These methods are used to decrease the delay in obtaining the output for real time signals.
These methods decompose the input signal into smaller blocks of finite length. Overlap Add method performs Linear Convolution on the blocks of data using FFT. The overlapped values are added to obtain the output signal. Overlap Save Method performs Circular Convolution on the blocks of data using FFT. The overlapped values are not taken.
Good explanation
ReplyDeleteOAM and OSM are useful methods to filter long data sequences.
ReplyDeleteOAM computes Circular convolution very efficiently
ReplyDeleteOSM efficiently performs circular convolution.
DeleteOSM computes using circular convolution while OAM computes using linear convolution.
ReplyDeleteOSM and OAM can only be used for FIR Filters
ReplyDeleteOAM and OSM are similar methods.
DeleteOAM and OSM cannot be used for IIR filters
ReplyDeleteMainly used in long data input sequence
ReplyDelete