Author: Frédéric Levent
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0

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Author: Frédéric Levent
Publisher:
ISBN:
Category :
Languages : fr
Pages : 264

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Book Description
LA TRANSMISSION NUMERIQUE D'IMAGES DE TELEVISION POSE UN CERTAIN NOMBRE DE PROBLEMES LIES AU FAIT QU'ELLE NECESSITE D'UNE PART UNE BANDE PASSANTE IMPORTANTE ET D'AUTRE PART UN CODAGE ET UNE TRANSMISSION FLEXIBLE DE TELLE SORTE QUE LA RECEPTION S'EFFECTUE A PLUSIEURS NIVEAUX DE QUALITE (CARACTERISANT LA MULTI-RESOLUTION) FONCTION DU TYPE DE RECEPTEUR ET/OU DES CONDITIONS DE TRANSMISSION. NOUS DEVELOPPONS UNE METHODE DE COMPRESSION BASEE SUR L'UTILISATION D'UN FILTRAGE EN SOUS-BANDES, TRES EFFICACE EN TERMES DE DECORRELATION ET D'IMPLEMENTATION TEMPS REEL, ET D'UNE NOUVELLE METHODE DE QUANTIFICATION OPTIMALE. LES PAS DE QUANTIFICATION OPTIMAUX SONT CALCULES EN FONCTION DE LA PERCEPTION QUE L'IL A DE L'INFORMATION FREQUENTIELLE TRANSMISE ET SUIVANT LE MODELE STATISTIQUE DE LA DISTRIBUTION DES AMPLITUDES DES SOUS-BANDES. A CET EFFET, NOUS PROPOSONS PLUSIEURS METHODES DE DETERMINATION DES PARAMETRES OPTIMAUX POUR LES MODELES STATISTIQUES TESTES. LE SCHEMA DE COMPRESSION QUE NOUS PROPOSONS PERMET D'OBTENIR UN BON COMPROMIS ENTRE QUALITE, DEBIT ET COMPLEXITE DE MISE EN UVRE. LA TRANSMISSION DE L'IMAGE MULTI-RESOLUTION NECESSITE L'UTILISATION D'UNE MODULATION A ETATS DISCRETS DITE EN CONSTELLATION OU LES INFORMATIONS POUR LES DIFFERENTS RECEPTEURS SONT SUPERPOSEES LES UNES AUX AUTRES. L'ADOPTION D'UN TEL SCHEMA DE TRANSMISSION EXIGE UN CODAGE SOURCE ADAPTE. A LA MODULATION RENCONTREE TRADITIONNELLEMENT, NOUS PROPOSONS L'ASSOCIATION D'UN SCHEMA DE CODAGE PARTICULIER BASE SUR LA REQUANTIFICATION DES INFORMATIONS BASSE RESOLUTION POUR LA RECONSTRUCTION DE L'IMAGE HAUTE RESOLUTION. NOUS PROPOSONS UNE ALTERNATIVE TRES INTERESSANTE A CE SCHEMA, CONSTITUEE D'UNE NOUVELLE MODULATION MULTI-RESOLUTION BASEE SUR UNE REPARTITION DIFFERENTE DES INFORMATIONS ET ASSOCIEE A UN CODAGE SOURCE SIMPLIFIE. DANS CE CONTEXTE, NOUS EVALUONS LES APPORTS ET LES CONTRAINTES ENGENDRES PAR L'ADOPTION DES SCHEMAS DE CODAGE ET DE TRANSMISSION MULTI-RESOLUTION PAR RAPPORT AU SCHEMA TRADITIONNEL MONO-RESOLUTION EN TERMES DE QUALITE D'IMAGES RECONSTRUITES ET D'EFFICACITE DE TRANSMISSION.

Author: Huifang Sun
Publisher: CRC Press
ISBN: 1420058185
Category : Technology & Engineering
Languages : en
Pages : 456

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Book Description
Professionals in the video and multimedia industries need a book that explains industry standards for video coding and how to convert the compressed information between standards. Digital Video Transcoding for Transmission and Storage answers this demand while also supplying the theories and principles of video compression and transcoding technologies. Emphasizing digital video transcoding techniques, this book summarizes its content via examples of practical methods for transcoder implementation. It relates almost all of its featured transcoding technologies to practical applications. This volume takes a structured approach, starting with basic video transcoding concepts and progressing toward the most sophisticated systems. It summarizes material from research papers, lectures, and presentations. Organized into four parts, the text first provides the background of video coding theory, principles of video transmission, and video coding standards. The second part includes three chapters that explain the theory of video transcoding and practical problems. The third part explores buffer management, packet scheduling, and encryption in the transcoding. The book concludes by describing the application of transcoding, universal multimedia access with the emerging MPEG-21 standard, and the end-to-end test bed.

Author: Sungho Cho
Publisher:
ISBN:
Category :
Languages : en
Pages : 126

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Author: Iain E. Richardson
Publisher: John Wiley & Sons
ISBN: 1119965306
Category : Science
Languages : en
Pages : 357

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Book Description
H.264 Advanced Video Coding or MPEG-4 Part 10 is fundamental to a growing range of markets such as high definition broadcasting, internet video sharing, mobile video and digital surveillance. This book reflects the growing importance and implementation of H.264 video technology. Offering a detailed overview of the system, it explains the syntax, tools and features of H.264 and equips readers with practical advice on how to get the most out of the standard. Packed with clear examples and illustrations to explain H.264 technology in an accessible and practical way. Covers basic video coding concepts, video formats and visual quality. Explains how to measure and optimise the performance of H.264 and how to balance bitrate, computation and video quality. Analyses recent work on scalable and multi-view versions of H.264, case studies of H.264 codecs and new technological developments such as the popular High Profile extensions. An invaluable companion for developers, broadcasters, system integrators, academics and students who want to master this burgeoning state-of-the-art technology. "[This book] unravels the mysteries behind the latest H.264 standard and delves deeper into each of the operations in the codec. The reader can implement (simulate, design, evaluate, optimize) the codec with all profiles and levels. The book ends with extensions and directions (such as SVC and MVC) for further research." Professor K. R. Rao, The University of Texas at Arlington, co-inventor of the Discrete Cosine Transform

Author: Wendy Van den Broeck
Publisher: ASP / VUBPRESS / UPA
ISBN: 9054875410
Category : Digital television
Languages : en
Pages : 250

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Author: John Fullerton
Publisher: Indiana University Press
ISBN: 9780861966516
Category : Language Arts & Disciplines
Languages : en
Pages : 362

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No further information has been provided for this title.

Author: Neil deGrasse Tyson
Publisher: Disney Electronic Content
ISBN: 1426221789
Category : Philosophy
Languages : en
Pages : 329

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Book Description
In this thought-provoking follow-up to his acclaimed StarTalk book, uber astrophysicist Neil deGrasse Tyson tackles the world's most important philosophical questions about the universe with wit, wisdom, and cutting-edge science. For science geeks, space and physics nerds, and all who want to understand their place in the universe, this enlightening new book from Neil deGrasse Tyson offers a unique take on the mysteries and curiosities of the cosmos, building on rich material from his beloved StarTalk podcast. In these illuminating pages, illustrated with dazzling photos and revealing graphics, Tyson and co-author James Trefil, a renowned physicist and science popularizer, take on the big questions that humanity has been posing for millennia--How did life begin? What is our place in the universe? Are we alone?--and provide answers based on the most current data, observations, and theories. Populated with paradigm-shifting discoveries that help explain the building blocks of astrophysics, this relatable and entertaining book will engage and inspire readers of all ages, bring sophisticated concepts within reach, and offer a window into the complexities of the cosmos. or all who loved National Geographic's StarTalk with Neil deGrasse Tyson, Cosmos: Possible Worlds, and Space Atlas, this new book will take them on more journeys into the wonders of the universe and beyond.

Author:
Publisher:
ISBN:
Category : Radio
Languages : en
Pages : 622

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Author: Alexis Van Hurkman
Publisher: Pearson Education
ISBN: 0321929667
Category : Computers
Languages : en
Pages : 673

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Book Description
The 'Color Correction Handbook' covers a wide variety of techniques that can be used by colourists, no matter what system they're using. From the most basic methods for evaluating and correcting an overall image, to the most advanced targeted corrections and creative stylizations typically employed, this book covers it all.