An intra-gateway for entertainment contents in digital home

In this paper, we propose an intra-gateway server for the entertainment content in digital home environment and show an implemented prototype system which provides the interoperability among different DRMs, different services, and different content formats. We also define DRM conversion protocol to support the intra-gateway. It is operated on the UPnP protocol, which enables the devices to be used without any modification. The proposed system manipulates DRM applied contents to be played in various devices registered in digital home.