Introduction Bilinear time-frequency distributions, presented in the previous two sections, offer a wide range of methods designed for the analyze of non stationary signals. Nevertheless, a critical point of these methods is their readability, which means both a good concentration of the signal components and no misleading interference terms. Some efforts have been made recently in that direction, and in particular a general methodology referred to as reassignment. The purpose of this section is to present this methodology, to illustrate it on different examples, and to make the link with connected approaches (see [AF94], [KdVG76] and [AF95] for more details on reassignment).
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