Figure 2

Separated signal’s spectrogram and corresponding correlation matrix. In this example, dataset from [28] was used, and the proposed subband subspace IVA algorithm was used for separation, STFT frame size, STFT frame overlap, and FFT size were set to 512, 7/8, and 1024. In Figure 2a, brighter color means larger magnitude. In Figure 2b, the correlation matrix is reversed upside down for visualization.