This is where navigation should be.

DEMO_WAVELETS - Wavelet filter banks

Description

This demo exemplifies the use of the wavelet filter bank trees. All representations use "least asymmetric" Daubechies wavelet orthonormal filters 'sym8' (8-regular, length 16).

demo_wavelets_1.png

DWT representation

The filter bank tree consists of 11 levels of iterated 2-band basic wavelet filter bank, where only the low-pass output is further decomposed. This results in 12 bands with octave resolution.
demo_wavelets_2.png

8-band DWT representation

The filter bank tree (effectively) consists of 3 levels of iterated 8-band basic wavelet filter bank resulting in 22 bands. Only the low-pass output is decomposed at each level.
demo_wavelets_3.png

Full Wavelet filter bank tree representation

The filter bank tree depth is 8 and it is fully decomposed meaning both outputs (low-pass and high-pass) of the basic filter bank is plot further. This results in 256 bands linearly covering the frequency axis.
demo_wavelets_4.png

Full Wavelet filter bank tree representation

The same case as before, but symmetric nearly orthogonal basic filter bank is used.
demo_wavelets_5.png

Full Dual-tree Wavelet filter bank representation

This is a 2 times redundant representation using Q-shift dual-tree wavelet filters.