Overlap Add Method(OAM) and Overlap Save Method(OSM) are used to calculate linear convolution. These are especially efficient when the length of input sequence is large as is the case with practical real time systems. These are block processing techniques that means the input sequence is divided into blocks of suitable length and convolution of each block is found out. The output is then computed by adding the overlapping portion in OAM and discarding the overlapping portion in OSM. Output using both the techniques is same and this was verified through code.
Which uses less memory?
ReplyDeleteOAM requires memory to store the previous computational values. OSM requires no addition of transients, making it faster than OAM .Thus OSM uses less memory as the values are discarded.
DeleteNice..
ReplyDeleteThese methods can be used in FIR filters
ReplyDeleteWhy is it called as block transfer technique?
ReplyDeleteIt convolutes signal with transfer function block by block from the given input signal
ReplyDeleteOam and osm cannot be used to find o/p of IIR filter
ReplyDeleteFIR filters are designed using this method
ReplyDelete