This paper presents some contributions towards
Interactive Digital Television (iDTv), focusing on the central issue
of the use of back channel (or Interactivity Channel) for the
Brazilian Digital Television System Terrestrial (SBTVD-T or
ISDB-TB), highlighting the necessary infrastructure, applications
and services that can help with the challenges of promoting digital
inclusion in Brazil. As a product of these scientific investigations is
undergoing testing a prototype of a Service Guide to support the
promotion of citizenship through digital inclusion, which can be
exploited, for example, under the new TV Brazil and public
television network.
Keywords-- Interactive Digital Television, Interactivity and
Usability, Universal Access, Channel of Citizenship, Applications.
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