Design and implementation of download controller and render device based on UPnP

Based on a practical application,this paper presents a design and implementation of an embedded device which works as a download controller and a media renderer based on UPnP.The device can be used in the family video and audio file download system to link the download server and display devices.Thus the users can use home display devices(such as TV) to manage download process and play multimedia files.The paper details the key technologies for download controller and media renderer,and also identifies the difficulties in the performance.