| 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 |
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