Abstract

AbstractIn early 2003, the Brazilian government accelerated the decision process on analog to digital transition of terrestrial TV broadcast infrastructure, naming this initiative The Brazilian Digital Television System (SBTVD). This paper describes the access device architecture we have proposed for the SBTVD, as well as related issues. We focused on several requirements among which: flexibility to support the social economical diversity enabling market implementations that can vary on cost, complexity and applications; digital inclusion targeting a minimal cost architecture providing a simple access device to information and services by convergent broadcast and point-to-point telecommunication means; and scalability targets incorporating state-of-the-art technology, considering emerging services and the current legacy analog TV infrastructure available in Brazil. We cover the following specific topics: an architecture overview considering scalability, interoperability and regional and international requirements, operating system and middleware interfaces, audio and video coding formats and associate standards, technical and economical analysis, usability and user interface consistency. Finally two prototypes for the outlined access device architecture are reported.

Highlights

  • This paper presents the access device architecture we have proposed for the Brazilian Digital Television System (SBTVD)

  • The definition of access device architectures is an intensive engineering task that focuses on final users, considering an analog to digital TV infrastructure transition

  • This approach will reduce the creation of legacies based on technical mistakes related to commercial and political pressures during the transition decision process

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Summary

Introduction

This paper presents the access device architecture we have proposed for the Brazilian Digital Television System (SBTVD). Over the past two decades there were intense research, development and standardization activities worldwide related to the analog-to-digital transition of the terrestrial broadcast TV infrastructure [1]. These efforts resulted on established standards [9] such as the. The analog terrestrial TV operation in Brazil started on September 18th, 1950, through an antenna installed on the top of the São Paulo State Bank, in São Paulo In these past 56 years, the broadcast industry expanded its activities across all of the Brazilian territory, covering all the 5.561 cities in the country [13]. Higher number of channels; considering the poor offer of the local terrestrial programs; Low cost: considering the asymmetric income distribution, observed in developing countries

Access Device Architecture Overview
OPERATING SYSTEM
AUDIO AND VIDEO CODING FORMATS AND STANDARDS
USABILITY AND USER INTERFACE CONSISTENCY
A Generic User Interface Model for Interactive TV
TECHNICAL-ECONOMIC ANALYSIS
EXPERIMENTAL EVALUATION
CONCLUSION AND FUTURE WORK
10. Acknowledgements

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