An MPEG-21-enabled Video Adaptation Engine for Universal IPTV Access.pdf

An MPEG-21-enabled Video Adaptation Engine for Universal IPTV Access Ismail Djama CNRS LaBRI Lab. – University of Bordeaux 1, Talence, France djama@labri.fr Toufik Ahmed CNRS LaBRI Lab. – University of Bordeaux 1, Talence, France tad@labri.fr Daniel Negru CNRS PRiSM Lab – University of Versailles, Versailles, France dan@prism.uvsq.fr Nawel Zangar CNRS PRiSM Lab – University of Versailles, Versailles, France zana@prism.uvsq.fr Abstract In the context of Universal Multimedia Access (UMA), the user will be able to access and consume a rich set of multimedia content over dynamic and heterogeneous networks and devices. To rich this universal accessibility, the MPEG-21 multimedia framework is defining the entire multimedia content delivery chain (content creation, production, delivery, trade and consumption). The part 7 of this framework defines the digital item adaptation (DIA). The DIA specifies metadata for assisting the adaptation of digital item according to different constraint (storage, transmission, consumption). This paper presents an architecture and implementation of an MPEG-21-enabled Video Adaptation Engine (VAE) for allowing seamless IPTV access for heterogeneous devices and networks capabilities. The IPTV services considered in this paper are based on streaming Digital Video Broadcast –Terrestrial services over IP LAN and WLAN networks. The VAE is seen as a media gateway proxy with adaptation/streaming capabilities. The obtained results demonstrate the ability of our VAE to allow universal media access to digital content for a multitude of clients and network capabilities. Keyword IPTV, DVB-T, Adaptation engine, MPEG-21 Digital Item Adaptation. INTRODUCTION Within the last few years, the tendency has been towards convergence between the three worlds of network communications (data, telephony, and broadcast). This network convergence is aimed to enable the Universal Media Access (UMA) t