1000 resultados para Televisão digital terrestre


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A televisão tem sido o principal meio de comunicação em massa no Brasil e possui alta inserção nos lares. Por outro lado, o país carece de melhores condições educacionais para dar conta das necessidades de formação de sua população. O advento do Sistema Brasileiro de Televisão Digital (SBTVD) adicionado ao modelo educacional a distância pode ser uma das estratégias fundamentais para o atendimento das demandas da Educação no Brasil. O estudo apresenta as características dessas tecnologias e discute sua aplicabilidade.

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This research has the objective to present the economic, technological and social impacts on the TV Amazonas' employees development. The study was made based on the perception of directors, managers and old employees of the organization, since the creation of the Rede Amazonica Foundation. The methodical procedures were based on the phenomenologic-hermeneutic approach, using theoretical study, text analysis, documents and interviews. The theoretical referential was based on publications about the history of the television in the world, Brazil and Amazon. It looked at digital television, the importance of the education on people's development and the society, as a whole changes in the labor market, professional qualification; professional education and social responsibility. The results show that employees qualification has contributed directly to the economic, technological and social growth of TV Amazonas.

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Este estudo objetiva levantar os fatores relevantes – tanto positiva quanto negativamente - para a adoção e difusão dos televisores conectados no país. O objetivo é desenvolver e testar um metamodelo, gerado a partir de modelos já existentes na literatura, como o “TAM” (Technology Acceptance Model), de Davis (1989) e difusão de inovações “DOI” (Diffusion of Innovations), de Rogers (1995), em conjunto com as possibilidades trazidas pela nova tecnologia dos televisores conectados.

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In this work, we propose a solution to solve the scalability problem found in collaborative, virtual and mixed reality environments of large scale, that use the hierarchical client-server model. Basically, we use a hierarchy of servers. When the capacity of a server is reached, a new server is created as a sun of the first one, and the system load is distributed between them (father and sun). We propose efficient tools and techniques for solving problems inherent to client-server model, as the definition of clusters of users, distribution and redistribution of users through the servers, and some mixing and filtering operations, that are necessary to reduce flow between servers. The new model was tested, in simulation, emulation and in interactive applications that were implemented. The results of these experimentations show enhancements in the traditional, previous models indicating the usability of the proposed in problems of all-to-all communications. This is the case of interactive games and other applications devoted to Internet (including multi-user environments) and interactive applications of the Brazilian Digital Television System, to be developed by the research group. Keywords: large scale virtual environments, interactive digital tv, distributed

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Many challenges have been imposed on the middleware to support applications for digital TV because of the heterogeneity and resource constraints of execution platforms. In this scenario, the middleware must be highly configurable so that it can be customized to meet the requirements of applications and underlying platforms. This work aims to present the GingaForAll, a software product line developed for the Ginga - the middleware of the Brazilian Digital TV (SBTVD). GingaForAll adds the concepts of software product line, aspect orientation and model-driven development to allow: (i) the specification of the common characteristics and variables of the middleware, (ii) the modularization of crosscutting concerns - both mandatory and concepts variables - through aspects, (iii) the expression of concepts as a set of models that increase the level of abstraction and enables management of various software artifacts in terms of configurable models. This work presents the architecture of the software product line that implements such a tool and architecture that supports automatic customization of middleware. The work also presents a tool that implements the process of generating products GingaForAll

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Nowadays several electronics devices support digital videos. Some examples of these devices are cellphones, digital cameras, video cameras and digital televisions. However, raw videos present a huge amount of data, millions of bits, for their representation as the way they were captured. To store them in its primary form it would be necessary a huge amount of disk space and a huge bandwidth to allow the transmission of these data. The video compression becomes essential to make possible information storage and transmission. Motion Estimation is a technique used in the video coder that explores the temporal redundancy present in video sequences to reduce the amount of data necessary to represent the information. This work presents a hardware architecture of a motion estimation module for high resolution videos according to H.264/AVC standard. The H.264/AVC is the most advanced video coder standard, with several new features which allow it to achieve high compression rates. The architecture presented in this work was developed to provide a high data reuse. The data reuse schema adopted reduces the bandwidth required to execute motion estimation. The motion estimation is the task responsible for the largest share of the gains obtained with the H.264/AVC standard so this module is essential for final video coder performance. This work is included in Rede H.264 project which aims to develop Brazilian technology for Brazilian System of Digital Television

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Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

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Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

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Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

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Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

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Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

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Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

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Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

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Avanzando con la implementación del Plan de Acción de ALC sobre la Sociedad de la Información eLAC2007. Avances de Grupos de Trabajo eLAC2007. Indicadores Clave para medir las TIC para el desarrollo La falta de información sobre la Sociedad de la Información en ALC y soluciones en construcción. Seminario en el Caribe sobre Políticas Públicas de TIC. CEPAL y Comisión Europea firman memorando en materias de cohesión social e integración regional El gobierno electrónico y la interoperabilidad ¿Cómo impactan las TIC en la economía? ¿Cuáles son las temáticas más relevantes de eLAC2007? Enfocarse en el Caribe: mucho está pasando y mucho falta por pasar en políticas públicas …y ahora la solución ¿es TV Digital Terrestre y Convergencia Tecnológica en América Latina y el Caribe? Sin monitoreo del eLAC2007 no se constatan los avances. Últimas publicaciones. Preparando la II Conferencia Ministerial sobre la Sociedad de la Información eLAC2007.