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%0 Conference Proceedings
%A Liuni, Marco
%A Roebel, Axel
%A Romito, Marco
%A Rodet, Xavier
%T An Entropy Based Method for Local Time-adaptation of the Spectrogram
%D 2010
%B Computer Music Modeling and Retrivial
%C Malaga
%F Liuni10a
%K adaptive spectrogram
%K sound representation
%K sound analysis
%K sound synthesis
%K Rényi entropies
%K sparsity measures
%K frame theory.
%X We describe a method for local time-adaptation of the spectrogram of audio signals: it is based on the decomposition of a signal within a Gabor multi-frame of raised cosine windows through the STFT operator. The sparsity of the analyses in every single frame of the multi-frame is evaluated through the R ́enyi entropies measures. We give an analytical expression for the entropy of the spectrogram of a sinusoidal signal using Hanning windows of different sizes, and describe the results obtained with other basic signals; we then provide an example of the performance of our algorithm with an instrumental sound.
%1 6
%2 2
%U http://articles.ircam.fr/textes/Liuni10a/
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