Transmissão de Aplicações e Comandos de Edição ao Vivo em IPTV e DTV Terrestre

• Marcio Ferreira Moreno PUC-Rio
• Marcelo Ferreira Moreno PUC-Rio
• Luiz Fernando Gomes Soares PUC-Rio

Abstract

DTV applications (with their related media objects) and live editing commands (with their associated parameters) are transmitted embedded in data structures supported by asynchronous transport services that must be defined by each particular DTV system. This paper proposes several transport alternatives to Ginga-NCL middleware, stressing their data structures that allow for not only controlling the application life cycle and mapping the authoring syntax to the transfer syntax without the author’s intervention and knowledge, but also for improving the transmission and processing performance of DTV applications. Although focusing on the Ginga-NCL middleware for terrestrial TV and IPTV systems, the proposed alternatives can be extended to other middlewares.

Keywords: Multimedia Synchronism, Declarative Middleware, Ginga-NCL, Interactive DTV, NCL, SBTVD-T.