Transformee Du Signal
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Home > Art, Film & Photography > Transformee Du Signal: Analyse Harmonique Discrete, Transformee de Fourier Rapide, Transformee En Cosinus Discrete, Caractere de Dirichlet
Transformee Du Signal: Analyse Harmonique Discrete, Transformee de Fourier Rapide, Transformee En Cosinus Discrete, Caractere de Dirichlet

Transformee Du Signal: Analyse Harmonique Discrete, Transformee de Fourier Rapide, Transformee En Cosinus Discrete, Caractere de Dirichlet


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About the Book

Ce contenu est une compilation d'articles de l'encyclopedie libre Wikipedia. Pages: 40. Non illustre. Chapitres: Analyse harmonique discrete, Transformee de Fourier rapide, Transformee en cosinus discrete, Caractere de Dirichlet, Lifting en ondelettes, Analyse harmonique sur un groupe abelien fini, Transformee en Z, Caractere d'un groupe fini, Convolution de Dirichlet, Fonction booleenne, Identite de MacWilliams, Transformee de Fourier discrete, Somme de Gauss, Analyse harmonique sur un espace vectoriel fini, Transformee de Hilbert, Periode de Gauss, Theoreme d'echantillonnage de Nyquist-Shannon, Matrice circulante, Transformee de Walsh, Cepstre, Decomposition en modes empiriques, Transformee en W. Extrait: Un lifting en ondelettes est, en mathematiques, un schema d'implantation d'une transformation en ondelettes un peu different de celui plus habituel realise par les bancs de filtres. Le lifting en ondelettes est l'expression retenue pour designer le procede d'amelioration des proprietes des ondelettes par utilisation reciproque des bandes passe-bas et passe-haut. On obtient ainsi une transformation qui, a partir d'une ondelette a (admettons) moments nuls, produit une transformee dont les proprietes sont similaires a une ondelette a moments nuls superieur a . Le procede d'elevation (lifting) decrit ici a pour avantage d'avoir une complexite tres faible, de l'ordre de la moitie de celle de la transformee rapide de Fourier FFT. La transformation peut etre effectuee in situ, c'est-a-dire sans utilisation de memoire supplementaire. On perd cependant la propriete d'invariance par translation. Cette technique de transformation est notamment utilisee dans l'algorithme de compression d'images JPEG2000, et trouvera d'autres applications dans le traitement numerique du signal en general et la transmission ou le stockage de donnees echantillonnees (notamment la compression du son, ou de mesures physiques de precision). Le but de ce document est de synthetiser de facon con...


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Product Details
  • ISBN-13: 9781154896831
  • Publisher: Books LLC, Wiki Series
  • Publisher Imprint: Books LLC, Wiki Series
  • Height: 246 mm
  • No of Pages: 42
  • Spine Width: 2 mm
  • Weight: 95 gr
  • ISBN-10: 1154896838
  • Publisher Date: 25 Aug 2011
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: Analyse Harmonique Discrete, Transformee de Fourier Rapide, Transformee En Cosinus Discrete, Caractere de Dirichlet
  • Width: 189 mm


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Transformee Du Signal: Analyse Harmonique Discrete, Transformee de Fourier Rapide, Transformee En Cosinus Discrete, Caractere de Dirichlet
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