Filtering of long data sequence

Overlap add method and overlap save method are used for filtering long data sequence. These methods are used in practical world for multipying two signals. The input signal x(n) is divided into equal lengths and convoluted with h(n). Depending on which method is used, decomposed y(n) for both OAM and OSM was calculated.  Though FFT yield  faster results it cannot be used in practice as it requires the entire length of input signal which isn't possible as it would introduce large delay and memory requirements of the system will also increase. Hence OAM and OSM are preffered.

https://drive.google.com/open?id=0B8Ks3rz0S_nzUDFfQjFLQWkwOGs