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Question: Does the use of MPEG-21 in AXMEDIS cut down the transportability of media among different devices and platforms ? Answer: AXMEDIS is not based only on MPEG-21, AXMEDIS tools for content processing can work with any file (audio, video, images, document, animations, html, smil, mpeg4, oma, mxf, etc.). It can produce also MPEG-21, when an object is an MPEG-21 package it has more information of a single image or document, and as cons lost its identity in terms of simple file format e.g. TIF< GIF, etc. This identity in effect is not lost internally, and any AXMEDIS player/editor may extract it according to the DRM. The advantages are the possibility of managing all content type in a uniform manner, standard metadata, etc. In addition AXMEDIS players are: players also for other content types such as document, images, video, etc. available for PC, Apple MAC OS, PDA, and STB/PVR, thus the transportability is guaranteed.
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