| Paper: | SPTM-P3.1 | ||
| Session: | Time-Frequency Distributions | ||
| Time: | Wednesday, May 19, 09:30 - 11:30 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing Theory and Methods: Non-stationary Signals & Time-Frequency Analysis | ||
| Title: | ON THE USE OF TIME-FREQUENCY WARPING OPERATORS FOR ANALYSIS OF MARINE-MAMMAL SIGNALS | ||
| Authors: | Cornel Ioana; ENSIETA | ||
| André Quinquis; ENSIETA | |||
| Abstract: | Processing marine-mammal signals for passive oceanic acoustic tomography or species classification are problems that have recently attracted attention in scientific literature. Practically, it has been observed that the time-frequency structures of the marine-mammal signals are generally non-linear. This fact dramatically affects the performances achieved by the Cohen's class methods, knowing that these methods correctly perform only for linear time-frequency structures. Fortunately, it is possible to generate other class of time-frequency representations (TFRs) using the warping operator principle. Based on this principle, we propose a new method for marine-mammal signal characterization. More precisely, many warping operators will be used to “linearize” the time-frequency content of the signal. Furthermore, the chirp-like structures will be estimated. The results obtained for real data illustrate the attractive outlines of the proposed method. | ||
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