The paper targets to demonstrate through a set of experimental studies that the common operation of IP DiffServ and DVB Bandwidth Management (BM) mechanisms can offer quality gains for prioritized MPEG-4 FGS media delivery across an heterogeneous IP/DVB setting. The experimental studies refer to the delivery of eight YUV QCIF 4:2:0 different video sequences across a heterogeneous IP/DVB testbed that includes two IP autonomous systems interconnected through a DVB MPEG-2 autonomous system acting as a trunk network. Keywords-Bandwidth Management; DiffServ; MPEG-4 FGS; Packet Prioritization; Quality Metrics