Institut Mines Telecom-telecome Paristech

Sebastien Fenet

Yves Grenier

Richard Gael

The invention concerns a method for generating a signature of a musical audio signal of a given duration, the method comprising the following steps: &#x2014;modelling () the musical audio signal to obtain, for each frequency band of a set of n frequency bands, a diagram representing the energy of the audio signal for the frequency band, on the basis of the time during said given duration; &#x2014;determining () musical transition times tof the audio signal during the given duration; &#x2014;associating () each musical transition time tk with an item of local information comprising a vector of n values representative, respectively, of the energy of the audio signal in each of the n diagrams obtained between musical transition time tk and a subsequent musical transition time tk+1 and/or a vector of n values representative, respectively, of the energy of the audio signal in each of the n diagrams obtained between musical transition time tk and a preceding musical transition time tk&#x2212;1; &#x2014;determining (), on the basis of the local information associated with each musical transition time tk, a key associated with the musical transition time, the determined keys forming a first set of keys of the audio signal; &#x2014;generating () a signature of the musical audio signal comprising pairs of keys from the first set of keys and associated musical transition times tk.

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Cachan, France

Sebastien Fenet