DEMO_DGT - Basic introduction to DGT analysis/synthesis

The figure shows a spectrogram of the 'bat' signal. The coefficients are shown on a linear scale.

The figure show a set of Gabor coefficients for the 'bat' signal, computed using a DGT with a Gaussian window. The coefficients contains all the information to reconstruct the signal, even though there a far fewer coefficients than the spectrogram contains.

This figure shows only the coefficients for the positive frequencies. As the signal is real-value, these coefficients contain all the necessary information. Compare to the shape of the spectrogram shown on Figure 1.

This figure shows how the coefficients from DGTREAL can be picked from the coefficients computed by a full Short-time Fourier transform, as visualized by a spectrogram.