Abstract
MPEG-21 Digital Item Adaptation (DIA) allows for
a media codec agnostic multimedia adaptation
approach which enables the implementation of generic
adaptation engines. However, DIA is optimized for
static, server-based adaptation. In this paper we
introduce novel mechanisms to extend the DIA
approach towards dynamic and distributed scenarios.
This facilitates the placement of generic adaptation
nodes which perform media codec agnostic and
dynamic adaptation anywhere along the content
delivery path. To validate our work we implemented
such an adaptation node and evaluate its performance.