Multimedia Distributed Systems
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Um framework baseado em modelos para desenvolvimento de sistemas multimídia distribuídos autoadaptativos
Sistemas multimídia distribuídos possuem características bastante variáveis, podendo implicar em novos requisitos à medida que novas tecnologias são disponibilizadas ou na necessidade de adequação de acordo com a quantidade de recursos disponíveis. Dessa forma, tais aplicações devem ser capazes de realizar ajustes e adaptações dinâmicas, permit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/01/2011
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2. Adaptação de vídeo através de redes de serviços sobrepostos. / Video adaptation through overlay services networks.
A adaptação de vídeo é uma técnica amplamente explorada na provisão de conteúdos de forma que atendam adequadamente os mais diversos cenários de consumo, caracterizados por diferentes requisitos e restrições de rede, terminal e preferências do usuário. Entretanto, sua aplicação em sistemas de distribuição de vídeo de alta demanda, como CDNs,
Publicado em: 2010
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3. IPTV architecture with time-shift support based on peer-to-peer distribution. / Arquitetura de IPTV com suporte à apresentação deslocada no tempo baseada em distribuição peer-to-peer.
Telecommunication companies are suffering from the increasing offer of cheap and reliable voice over IP services, being forced to diversify their services looking for new revenue possibilities. Since these companies have a vast infrastructure, they are now providing TV services through the same telephony and data infrastructure, using their IP networks to of
Publicado em: 2009
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4. MODEL-DRIVEN RESOURCE MANAGEMENT: ADAPTABILITY AND INTEROPERABILITY ON END-TO-END QOS SUPPORT / GERENCIAMENTO DE RECURSOS DIRIGIDO POR MODELOS: ADAPTABILIDADE E INTEROPERABILIDADE NO SUPORTE A QOS FIM-A-FIM
The evolution of codification techniques for continuous media is making distributed multimedia applications even more popular. This kind of application has performance requirements that must be met in an end-to-end fashion, which can be achieved only if quality-of-service (QoS) provisioning mechanisms are applied on each participant subsystem. These mechanis
Publicado em: 2008
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5. Formal specification and verification of real-time systems using Graph Grammars
The importance of real-time systems has enormously increased in the last decade. Application areas that typically need real-time models include railroad systems, intelligent vehicle highway systems, avionics, multimedia and telephony. To assure that such systems are correct, additionally to prove that they provide the required functionality, time constraints
Journal of the Brazilian Computer Society. Publicado em: 2007-12
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6. REPRESENTATION AND AGGREGATION OF CONTENTS IN REPOSITORY OF LEARNING OBJECTS / REPRESENTAÇÃO E AGREGAÇÃO DE CONTEÚDOS EM REPOSITÓRIO DE OBJETOS DE APRENDIZAGEM
The education mediated by technology is a tool used in academic and corporative environments. With advance of the Web, diverse environments of teaching and learning make possible the production and distribution of multimedia contents for the use of learners and teachers. However the contents access still is one of the main problems for the use and sharing be
Publicado em: 2007
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7. Um framework para configuração e gerenciamento de recursos e componentes em sistemas multimidia distribuidos abertos / A framework for configuration and management of resources and components in open distributed multimedia systems
Em sistemas multimídia distribuídos existe uma diversidade de dispositivos de hardware, sistemas operacionais e tecnologias de comunicação. Para tratar os requisitos destas aplicações, os componentes do sistema precisam interagir entre eles considerando os aspectos de QoS de cada um dos elementos envolvidos. Neste contexto, esta tese apresenta o Cosmos
Publicado em: 2006
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8. Traffic modelling, policing and scheduling in Ethernet passive optical networks / Modelagem, policiamento e escalonamento em redes Ethernet PON
We propose new framework for traffic modelling, policing and scheduling in Ethernet Passive Optical Networks. This framework aims at providing performance guarantees to individual flows in access networks. We propose a new envelope process called Fractional Bounded Arrival Process for selfsimilar multimedia traffic representation. The policing of such a kind
Publicado em: 2006
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9. A software development platform based on components for mobile devices / Plataforma de desenvolvimento de software baseado em componentes para dispositivos moveis
This work presents an infrastructure for supporting component-based software development for mobile devices with limited resources regarding processing power and storage. This infrastructure is based on a neutral component model in terms of technology and specified entirely in UML (Unified Modeling Language). The platform employs Web Services for synchronous
Publicado em: 2005
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10. "Processamento distribuído de áudio em tempo real" / "Distributed Real-Time Audio Processing"
Computer systems for real-time multimedia processing require high processing power. Problems that depend on high processing power are usually solved by using parallel or distributed computing techniques; however, the combination of the difficulties of both real-time and parallel programming has led the development of applications for real-time multimedia pro
Publicado em: 2004
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11. Um mecanismo integrado de cache e prefetching para sistemas de entrada e saída de alto desempenho.
An integrated caching and prefetching mechanism for a parallel network file system has the potential to improve both the speed and performance of I/O operations. Different cache policies and algorithms can be used in the system. Different prefetching mechanisms can also be used in the system. The performance of the I/O operations can also be influenced by ot
Publicado em: 2004
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12. eMeet/SERVE: automated generation of multimedia hyperdocuments by means of captured information from distributed meetings / "EMEET/SERVE: geração sob-demanda de hiperdocumentos multimídia a partir de informação capturada em reuniões distribuídas"
The literature discusses many software systems developed to automate the process of generating multimedia hyperdocuments from live experiences; educational and meeting environments are the most common application domains. As reported, those systems do not present features considered important towards the evolution of hyperdocuments associated to live experie
Publicado em: 2002