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Discrete Wavelet Transform Filter Bank Implementation (part 2)

David — Sun, 05 Dec 2010 17:29:59 +0000

Following the previous blog entry: http://www.dsprelated.com/showarticle/115.php

Difference between DWT and DWPT

Before getting to the equivalent filter obtention, I first want to talk about the difference between DWT(Discrete Wavelet Transform) and DWPT (Discrete Wavelet Packet Transform). The latter is used mostly for image processing.

While DWT has a single "high-pass" branch that...

Discrete Wavelet Transform Filter Bank Implementation (part 1)

David — Thu, 28 Oct 2010 00:19:52 +0000

UPDATE: Added graphs and code to explain the frequency division of the branches

The focus of this article is to briefly explain an implementation of this transform and several filter bank forms. Theoretical information about DWT can be found elsewhere.

First of all, a 'quick and dirty' simplified explanation of the differences between DFT and DWT:

The DWT (Discrete...

Personal presentation and greetings

David — Wed, 27 Oct 2010 21:40:00 +0000

Hello fellow DSPrelated readers!

First of all, my name is David Valencia, I live in Mexico City and study in the Instituto Politécnico Nacional [IPN] (or National Polytechnic Institute) with a major in Telematic engineering. I'm 21 years old and have interest in telecommunications, signal transmission and networking.

I'm honored with the chance to cooperate with this great...