Catégorie de document |
Contribution à un colloque ou à un congrès |
Titre |
An Entropy Based Method for Local Time-adaptation of the Spectrogram |
Auteur principal |
Marco Liuni |
Co-auteurs |
Axel Roebel, Marco Romito, Xavier Rodet |
Colloque / congrès |
Computer Music Modeling and Retrivial. Malaga : Juin 2010 |
Comité de lecture |
Oui |
Année |
2010 |
Statut éditorial |
Accepté - publication en cours |
Résumé |
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. |
Mots-clés |
adaptive spectrogram / sound representation / sound analysis / sound synthesis / Rényi entropies / sparsity measures / frame theory. |
Equipe |
Analyse et synthèse sonores |
Cote |
Liuni10a |
Adresse de la version en ligne |
http://articles.ircam.fr/textes/Liuni10a/index.pdf |
|