Marcelo Ferreira Moreno

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Nested Context Language (NCL) is the declarative language of the Brazilian Terrestrial Digital TV System. NCL is part of ISDB (International Standard for Digital Broadcasting) standards and also the ITU-T Recommendation H.761 for IPTV services. This paper presents, discusses, and illustrates the NCL hierarchical control model for multiple exhibition device(More)
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Intermedia synchronization is related with spatial and temporal relationships among media objects that compound a DTV application. From the server side (usually a broadcaster's server or a Web Server) to receivers, end-to-end intermedia synchronization support must be provided. Based on application specifications, several abstract data structures should be(More)
To allow producing digital TV applications independently from receiver’s hardware and operating system, and also to provide better support to application designs, middleware layer is introduced in digital TV system architectures. At first, middleware systems were developed aiming at specific transport platforms (IPTV, terrestrial DTV, etc.), offering(More)
1 Abstract – The increasing demand for distributed multimedia applications makes evident the need for end-toend quality of service (QoS) provisioning. Particularly, operating systems, despite their location at end systems, switches or routers, must guarantee that resources under their control are adequately managed to fulfill the application requirements.(More)
This paper focuses on the support provided by NCL (Nested Context Language) to relate objects with imperative code content and declarative hypermedia-objects (objects with declarative code content specifying hypermedia documents). NCL is the declarative language of the Brazilian Terrestrial Digital TV System (SBTVD) supported by its middleware called Ginga.(More)
Hypermedia content workflows involve many environments and actors, from the content producer to the service operator, from the editing studio to the service head-end. They all have different needs on hypermedia content creation and editing. Nowadays, even viewers are demanding tools to enrich content. But currently a single authoring tool cannot fulfill(More)
Despite of the establishment of digital television services, audience measurement and other media analysis still rely on obsolete and usually expensive techniques that date back to the analog era. Moreover, the introduction of interactive services into TV terminal devices is not adequately considered in such market researches. The analysis of both viewer's(More)
This paper proposes and compares two approaches for data capture to support the analysis of user interaction and audience measurement in Interactive digital TV (IDTV) systems. The first approach relies on the development of extensions to existent standards and the second one depends only on resources commonly available in IDTV systems. Tools for audience(More)
This paper discusses the importance of non-functional requirements in the design of hypermedia authoring tools, which typically provides multiple graphical abstractions (views). It focuses on creating products and services that operate robustly across a broad range of environments, and that take into account the changeable needs of their users over time, as(More)