Generalization of the reassignment method to all bilinear time-frequency and time-scale representations

Authors:
F. Auger;P. Flandrin
Affiliations:
Lab. d'Autom. de Nantes, Nantes Univ., France;Signal Process. Res. Centre, Queensland Univ. of Technol., Brisbane, Qld., Australia
Venue:
ICASSP '94 Proceedings of the Acoustics, Speech, and Signal Processing,1994. on IEEE International Conference - Volume 04
Year:
1994

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Abstract

Reassigning each value of a time-frequency representation to a different location in the plane can produce a better localization of the signal components. This idea, pioneered by Kodera et al. (1976, 1978), was only applied to the sole spectrogram. We present a new formulation of this method which allows a generalization of its use for any bilinear time-frequency or time-scale representation. The resulting reassigned distributions are easily computable versatile tools which highlight the signal features and preserve many theoretical properties.