Challenge 2: Whale Song Processing

It has been well documented that Humpack whales produce songs with a specific structure. We provide 26 minutes of a remarkable Humpback whale song recording produced at few meters distance from the whale in La Reunion - Indian Ocean, by our "Darewin" research group in 2013 (frequency sample = 44.1kHz, 32 bits, mono, wav, 130MB). Upload here 26 minutes of a remarkable Humpback whale song recording.

spectrum Humpback Whale
Figure: Spectrum of around 20 seconds of the given song of Humpback Whale (start from about 5'40 to 6'. Ordinata from 0 to 22.05 kHz, over 512 bins (fft on 1024 bins), frameshift of 10 ms.

WARNING: There was a file corruption introducing a bug in the previous .mat file, this new one is corrected and up to date (october 8th 2013).

We also give the usual Mel Filter Cepstrum Coefficients of this wav file (octave / matlab v6 format). The parameters of extraction of these MFCC are given here..

For this challenge, you may propose any efficient representation of this song that helps to study its structure, discover and index its song units. You can find an interesting preliminary approach in: Pace, F., Benard, F., Glotin, H., Adam, O., and White, P. (2010) Subunit definition for humpback whale call classification, int. journal Applied Acoustics, Elsevier, 11(71)

The workshop will allow discussions over the proposed representations (clustering, indexing, sequence modeling etc.). Your representation of this song file shall be sent to in usual format (.xml, .csv or .mat ...). The size (bytes) of your representation and its quality (MSE on the reconstructed signal of interest) will be used to rank it.

Humpback Whale
Figure: Humpback Whale

Deadline: 20th november