Download or read book Approximations non lineaires pour l analyse des signaux sonores written by Rémi Gribonval and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book APPROXIMATIONS NON LINEAIRES POUR L ANALYSE DES SIGNAUX SONORES written by REMI.. GRIBONVAL and published by . This book was released on 1999 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA CLASSIFICATION DE SIGNAUX EN GRANDE DIMENSION NECESSITE LA SELECTION D'UN PETIT NOMBRE DE CARACTERISTIQUES POUR REPRESENTER CHAQUE SIGNAL. LES APPROXIMATIONS NON-LINEAIRES DONNENT DES REPRESENTATIONS CONCISES, EN S'ADAPTANT A LA STRUCTURE DE CHAQUE SIGNAL ANALYSE. LEUR EMPLOI EST PROMETTEUR. LA PREMIERE PARTIE DE CE TRAVAIL DEFINIT DES REPRESENTATIONS ADAPTATIVES RAPIDES DE SIGNAUX COMME COMBINAISON LINEAIRE D'ATOMES EXTRAITS D'UN DICTIONNAIRE. A PARTIR DE L'ALGORITHME DE MATCHING PURSUIT, NOUS PROPOSONS PLUSIEURS METHODES ITERATIVES POUR EXTRAIRE LES STRUCTURES CARACTERISTIQUES DES SIGNAUX SONORES. LE MATCHING PURSUIT HARMONIQUE DECOMPOSE UN SIGNAL EN COMPOSANTES HARMONIQUES ELEMENTAIRES. LE MATCHING PURSUIT CHIRPE EXTRAIT LES VARIATIONS DE FREQUENCE INSTANTANEE. IL TIRE PARTI D'UNE ANALYSE FINE DES RIDGES DU DICTIONNAIRE DE GABOR MULTI-ECHELLE. LES APPROXIMATIONS FOURNIES PAR LE MATCHING PURSUIT HAUTE-RESOLUTION PRESERVENT LES TRANSITOIRES, EN IMPOSANT DES CONTRAINTES DE RESOLUTION TEMPORELLE. NOUS ACCELERONS CES TECHNIQUES EN EMPLOYANT DES SOUS-DICTIONNAIRES DE MAXIMA LOCAUX. DANS UN SECOND TEMPS ON ETUDIE L'ANALYSE DISCRIMINANTE NON-LINEAIRE. POUR CLASSIFIER DES SIGNAUX, LES METHODES D'ANALYSE DISCRIMINANTE LINEAIRE REDUISENT LA DIMENSION EN LES PROJETANT SUR UN SOUS-ESPACE PRE-DETERMINE. UNE PROJECTION ADAPTATIVE, EN FONCTION DU SIGNAL ANALYSE, EXTRAIT DE CELUI-CI DES CARACTERISTIQUES QUI LUI SONT PROPRES. ELLES LE DISTINGUENT ET PERMETTENT DE LE CLASSIFIER EFFICACEMENT. NOUS DETERMINONS LA STRATEGIE OPTIMALE DE PROJECTION ADAPTATIVE POUR LA CLASSIFICATION DE BRUITS GAUSSIENS COLORES. AFIN DE CLASSIFIER DES TRANSITOIRES, NOUS EXPLORONS ENFIN UNE METHODE UTILISANT LES MAXIMA DU MODULE DE LA TRANSFORMEE EN ONDELETTES ET DES ARBRES DE DECISION. CETTE APPROCHE PERMET DE SURMONTER LES DIFFICULTES LIEES A L'INVARIANCE PAR TRANSLATION DES SIGNAUX A CLASSIFIER.
Download or read book Approximations non lin aires pour l analyse des signaux sonores written by Rémi Gribonval and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La classification de signaux en grande dimension nécessite la sélection d'un petit nombre de caractéristiques pour représenter chaque signal. Les approximations non-linéaires donnent des représentations concises, en s'adaptant à la structure de chaque signal analysé. Leur emploi est prometteur. La première partie de ce travail définit des représentations adaptatives rapides de signaux comme combinaison linéaire d'atomes extraits d'un dictionnaire. À partir de l'algorithme de matching pursuit, nous proposons plusieurs méthodes itératives pour extraire les structures caractéristiques des signaux sonores. Le matching pursuit harmonique décompose un signal en composantes harmoniques élémentaires. Le matching pursuit chirpe extrait les variations de fréquence instantanée. Il tire parti d'une analyse fine des ridges du dictionnaire de gabor multi-échelle. Les approximations fournies par le matching pursuit haute-résolution préservent les transitoires, en imposant des contraintes de résolution temporelle. Nous accélérons ces techniques en employant des sous-dictionnaires de maxima locaux. Dans un second temps on étudie l'analyse discriminante non-linéaire. Pour classifier des signaux, les méthodes d'analyse discriminante linéaire réduisent la dimension en les projetant sur un sous-espace prédéterminé. Une projection adaptative, en fonction du signal analyse, extrait de celui-ci des caractéristiques qui lui sont propres. Elles le distinguent et permettent de le classifier efficacement. Nous déterminons la stratégie optimale de projection adaptative pour la classification de bruits gaussiens colorés. Afin de classifier des transitoires, nous explorons enfin une méthode utilisant les maxima du module de la transformée en ondelettes et des arbres de décision. Cette approche permet de surmonter les difficultés liées à l'invariance par translation des signaux à classifier.
Download or read book Signal Processing Methods for Music Transcription written by Anssi Klapuri and published by Springer Science & Business Media. This book was released on 2007-02-26 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves as an ideal starting point for newcomers and an excellent reference source for people already working in the field. Researchers and graduate students in signal processing, computer science, acoustics and music will primarily benefit from this text. It could be used as a textbook for advanced courses in music signal processing. Since it only requires a basic knowledge of signal processing, it is accessible to undergraduate students.
Download or read book Time Frequency Analysis written by Franz Hlawatsch and published by John Wiley & Sons. This book was released on 2013-03-01 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering a period of about 25 years, during which time-frequency has undergone significant developments, this book is principally addressed to researchers and engineers interested in non-stationary signal analysis and processing. It is written by recognized experts in the field.
Download or read book Wavelets written by Stephane Jaffard and published by SIAM. This book was released on 2001-01-01 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: This long-awaited update of Meyer's Wavelets: Algorithms and Applications includes completely new chapters on four topics: wavelets and the study of turbulence, wavelets and fractals (which includes an analysis of Riemann's nondifferentiable function), data compression, and wavelets in astronomy. The chapter on data compression was the original motivation for this revised edition, and it contains up-to-date information on the interplay between wavelets and nonlinear approximation. The other chapters have been rewritten with comments, references, historical notes, and new material. Four appendices have been added: a primer on filters, key results (with proofs) about the wavelet transform, a complete discussion of a counterexample to the Marr-Mallat conjecture on zero-crossings, and a brief introduction to H?lder and Besov spaces. In addition, all of the figures have been redrawn, and the references have been expanded to a comprehensive list of over 260 entries. The book includes several new results that have not appeared elsewhere.
Download or read book The Computer Music Tutorial second edition written by Curtis Roads and published by MIT Press. This book was released on 2023-06-06 with total page 1287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expanded, updated, and fully revised—the definitive introduction to electronic music is ready for new generations of students. Essential and state-of-the-art, The Computer Music Tutorial, second edition is a singular text that introduces computer and electronic music, explains its motivations, and puts topics into context. Curtis Roads’s step-by-step presentation orients musicians, engineers, scientists, and anyone else new to computer and electronic music. The new edition continues to be the definitive tutorial on all aspects of computer music, including digital audio, signal processing, musical input devices, performance software, editing systems, algorithmic composition, MIDI, and psychoacoustics, but the second edition also reflects the enormous growth of the field since the book’s original publication in 1996. New chapters cover up-to-date topics like virtual analog, pulsar synthesis, concatenative synthesis, spectrum analysis by atomic decomposition, Open Sound Control, spectrum editors, and instrument and patch editors. Exhaustively referenced and cross-referenced, the second edition adds hundreds of new figures and references to the original charts, diagrams, screen images, and photographs in order to explain basic concepts and terms. Features New chapters: virtual analog, pulsar synthesis, concatenative synthesis, spectrum analysis by atomic decomposition, Open Sound Control, spectrum editors, instrument and patch editors, and an appendix on machine learning Two thousand references support the book’s descriptions and point readers to further study Mathematical notation and program code examples used only when necessary Twenty-five years of classroom, seminar, and workshop use inform the pace and level of the material
Download or read book Analyse et mod lisation de signaux sonores par des repr sentations temps fr quence lin aires written by Philippe Guillemain and published by . This book was released on 1994 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE CONCERNE L'ANALYSE ET LA MODELISATION DE SIGNAUX SONORES. LES TECHNIQUES DEVELOPPEES FONT APPEL A DES REPRESENTATIONS TEMPS-ECHELLE ET TEMPS-FREQUENCE LINEAIRES ET CONTINUES, TELLES QUE LA TRANSFORMEE EN ONDELETTES ET LA TRANSFORMEE DE GABOR. A PARTIR DE L'ETUDE THEORIQUE DU COMPORTEMENT DES TRANSFORMEES DE SIGNAUX DETERMINISTES APPARTENANT A DES CLASSES SPECIFIQUES, TELS QUE LES SIGNAUX ASYMPTOTIQUES ET LES SIGNAUX TRANSITOIRES, ON DEVELOPPE UN ENSEMBLE DE TECHNIQUES CONDUISANT A L'ESTIMATION DE PARAMETRES QUANTITATIFS CARACTERISANT LE SIGNAL. DANS UNE OPTIQUE D'ANALYSE-SYNTHESE DE SONS PRODUITS PAR DES INSTRUMENTS DE MUSIQUE TRADITIONNELS, ON CONSIDERE TOUT D'ABORD LE CAS DE SIGNAUX NON STATIONNAIRES COMPOSES DE SOMMES DE CONTRIBUTIONS ELEMENTAIRES MODULEES EN AMPLITUDE ET EN FREQUENCE AU COURS DU TEMPS. A PARTIR DE DEVELOPPEMENTS EN SERIE ET D'APPROXIMATIONS ASYMPTOTIQUES DE LEURS TRANSFORMEES, ON PROPOSE DES ALGORITHMES PERMETTANT D'ISOLER CHAQUE COMPOSANTE ET D'ESTIMER SON AMPLITUDE ET SA FREQUENCE INSTANTANEES, SANS HYPOTHESE A PRIORI SUR LA SELECTIVITE TEMPORELLE ET FREQUENTIELLE DE L'ANALYSE. UNE MODELISATION DE CE TYPE CONDUIT NATURELLEMENT A UNE RESYNTHESE DITE ADDITIVE, QUI PEUT EGALEMENT DONNER LIEU A DES TRANSFORMATIONS MUSICALES INTIMES PAR SIMPLE MODIFICATION DES PARAMETRES ESTIMES. ON S'INTERESSE ENSUITE A LA CARACTERISATION DE SIGNAUX TRANSITOIRES. POUR CELA, ON CHOISIT TOUT D'ABORD LA CLASSE DES FONCTIONS HOMOGENES DE DEGRE COMPLEXE COMME MODELE DE SIGNAL, QUI DONNE LIEU A UNE TRANSFORMEE EN ONDELLETTES EXPLICITE DONT ON EXPLOITE LES PROPRIETES AFIN D'ESTIMER LE DEGRE D'HOMOGENEITE. LES RESULTATS OBTENUS SONT ETENDUS AU CAS DE SIGNAUX LARGE BANDE, POUR LESQUELS ON PROPOSE DES ALGORITHMES PERMETTANT D'ESTIMER LA DENSITE SPECTRALE ET LE RETARD DE GROUPE. CETTE ETUDE A PERMIS EN PARTICULIER DE METTRE EN PARALLELE LE COMPORTEMENT DES TRANSFORMEES DE SIGNAUX LOCALISES SOIT SPECTRALEMENT, SOIT TEMPORELLEMENT
Download or read book Acoustics of Musical Instruments written by Antoine Chaigne and published by Springer. This book was released on 2016-05-12 with total page 855 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, the first English-language translation of Acoustique des instruments de musique, Second Edition, presents the necessary foundations for understanding the complex physical phenomena involved in musical instruments. What is the function of the labium in a flute? Which features of an instrument allow us to make a clear audible distinction between a clarinet and a trumpet? With the help of numerous examples, these questions are addressed in detail. The authors focus in particular on the significant results obtained in the field during the last fifteen years. Their goal is to show that elementary physical models can be used with benefit for various applications in sound synthesis, instrument making, and sound recording. The book is primarily addressed to graduate students and researchers; however it could also be of interest for engineers, musicians, craftsmen, and music lovers who wish to learn about the basics of musical acoustics.
Download or read book New avenues for astronomical data analysis written by Jean-Pierre Rozelot and published by . This book was released on 2002 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Signal Processing in Acoustics written by and published by Springer Science & Business Media. This book was released on 2008 with total page 1932 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal de physique written by and published by . This book was released on 2002 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the International Congress on Acoustics written by and published by . This book was released on 1971 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Mixture Distributions written by B. Everitt and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite mixture distributions arise in a variety of applications ranging from the length distribution of fish to the content of DNA in the nuclei of liver cells. The literature surrounding them is large and goes back to the end of the last century when Karl Pearson published his well-known paper on estimating the five parameters in a mixture of two normal distributions. In this text we attempt to review this literature and in addition indicate the practical details of fitting such distributions to sample data. Our hope is that the monograph will be useful to statisticians interested in mixture distributions and to re search workers in other areas applying such distributions to their data. We would like to express our gratitude to Mrs Bertha Lakey for typing the manuscript. Institute oj Psychiatry B. S. Everitt University of London D. l Hand 1980 CHAPTER I General introduction 1. 1 Introduction This monograph is concerned with statistical distributions which can be expressed as superpositions of (usually simpler) component distributions. Such superpositions are termed mixture distributions or compound distributions. For example, the distribution of height in a population of children might be expressed as follows: h(height) = fg(height: age)f(age)d age (1. 1) where g(height: age) is the conditional distribution of height on age, and/(age) is the age distribution of the children in the population.
Download or read book Proceedings of the ICA Congress written by and published by . This book was released on 1971 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Sections C H S Subjective acoustics written by and published by . This book was released on 1971 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1971 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt:
