Figure 4
From: Correlation-Based Amplitude Estimation of Coincident Partials in Monaural Musical Signals
Trajectories (a) and (b) come from partials belonging to the same source, thus having very similar behaviors. Trajectory (c) corresponds to a partial from another source. Trajectory (d) corresponds to a mixture partial; its characteristics result from the combination of each partial trends, as well as from phase interactions between the partials. The correlation procedure aims to quantify how close the mixture trajectory is from the behavior expected for each source.