A DECLARATIVE MIDDLEWARE TO INTERACTIVE TV SYSTEMS / UM MIDDLEWARE DECLARATIVO PARA SISTEMAS DE TV DIGITAL INTERATIVA

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The evolution of digital modulation techniques and the efficient schemes for digital transmissions have allowed the advent of the digital TV. Conceiving low cost receivers is one of the main challenges to broaden digital TV use, mainly in non-developed countries. As a consequence, low cost requirements should not burden receiver resources that should try to reduce their costs in items such as software copyright and royalties. In this scenario, the middleware (which use mechanisms defined by the communication protocols, the operational system and its libraries) conception plays an important role. A great number of declarative middlewares focuses on user interaction instead of synchronization, in its broad sense. However, the majority of digital TV applications deals with different types of media-object synchronization, beyond the audio and video that compose the main stream. Thus, the declarative middleware language focus should be placed on synchronism, having user interaction as a special synchronization case. This is the goal of this work. The middleware implementation presented in this work is based on the modular architecture of the HyperProp Formatter, whose architecture was reorganized in a simple profile for digital TV systems. The implementation was carried out using C++ language, and all media players were developed to run in low cost receivers.

ASSUNTO(S)

digital tv tv interativa declarative middleware formatador interactive tv tv digital formatter middleware declarativo

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