WS4_paper2_Ibrahim_Lohmar_El Essaili_d’Allonnes

This paper presents the concepts of overlaying personalized TV1 graphics on the device side, controlled and triggered by Dynamic Adaptive Streaming over HTTP (DASH) in-band events. TV graphics personalization helps engaging viewers in the program and maximize the value of information shown to them. Today’s TV graphics are encoded within the video making it difficult to modify it afterwards. Also for offerings using HTTP Adaptive Bitrate (ABR) technologies, the graphics are encoded with the video. Graphics become unreadable when the ABR algorithm switches to low quality representation e.g. due to bad network conditions. Overlaying the graphics on the player side decouples the quality of the graphics from the quality of the video. This paper describes how to control and personalize TV graphics using timed in-band events defined in MPEG-DASH. Each viewer can resolve the events to different auxiliary media according to its profile. The graphics handling is performed at the client side where each client fetches and overlays the auxiliary media to the video. This allows personalization of graphics and provides high quality overlays independent of the current video qualit