Ginga-NCL: declarative middleware for multimedia IPTV services

  • Authors:

  • Luiz Fernando Gomes Soares;Marcio Ferreira Moreno;Carlos De Salles Soares Neto;Marcelo Ferreira Moreno

  • Affiliations:

  • Pontifical Catholic University of Rio de Janeiro;Pontifical Catholic University of Rio de Janeiro;Pontifical Catholic University of Rio de Janeiro;Pontifical Catholic University of Rio de Janeiro

  • Venue:
  • IEEE Communications Magazine
  • Year:
  • 2010

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Abstract

This article presents the innovative features of Ginga-NCL, an open middleware specification for multimedia IPTV services. Ginga-NCL relies on the Nested Context Language, a domain-specific declarative language targeting multimedia application authoring. As a glue language, NCL relates media objects in time and space without restricting or imposing any media content type, including media objects with imperative and declarative code written using other languages. Other NCL features include support for multidevice presentations, content adaptations, presentation adaptations, and advanced code reuse. Ginga-NCL allows NCL applications to be modified on the fly by means of live editing commands. Initially defined as the standard middleware for the Brazilian terrestrial DTV system, Ginga-NCL has recently become part of ISDB standards and an ITU-T Recommendation for IPTV services.