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Filtering long data

Overlap Add method and Overlap Save Method

The real time signals available are large data signals. For processing any signal, the whole sequence should be present at the input at the same time. This is not possible for real time signals. so. overlap add method and overlap save method are used. They are block processing techniques as they divide the input sequence into block of data and then calculate the result. Overlap add method performs linear convolution on the data using FFT and the overlapping values are added to compute the result while overlap save method performs circular convolution on the data using FFT and the overlapping values are neglected. These methods are used to decrease the processing time of long signals. 

Comments

  1. Chaitanya S26 April 2017 at 07:46

    In OAM, by decomposing x(n) into 'L' point sequences we get x1(n), x2(n), etc

    ReplyDelete
  2. Nobody26 April 2017 at 11:17

    OAM and OSM cannot be used for IIR filter design and can be used for FIR filter design.

    ReplyDelete
  3. Unknown26 April 2017 at 11:32

    OAM and OSM are useful methods for processing real time signals

    ReplyDelete
  4. Meet Patel28 April 2017 at 20:36

    Osm is better tham oam

    ReplyDelete

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