Quality-of-experience driven adaptive HTTP media delivery

driven approach for multi-user resource optimization in Dynamic Adaptive Streaming over HTTP (DASH) over next generation wireless networks. Our objective is to enhance the user experience in adaptive HTTP streaming by jointly considering the character-istics of the media content and the available wireless resources in the operator network. Specifically, we propose a proactive QoE-based approach for rewriting the client HTTP requests at a proxy in the mobile network. The advantage of the proposed approach is its applicability for over-the-top (OTT) streaming as it requires no adaptation of the media content. We compare our proposed scheme to both reactive QoE-optimized and to standard-DASH HTTP streaming. Our contributions are: 1) We first show that standard OTT DASH leads to unsatisfactory performance since the content agnostic resource allocation by the LTE scheduler is far from optimal, and we can achieve a clear QoE improvement when considering the content characteristics. 2) We additionally show that proactively rewriting the client requests gives control of the video content adaptation to the network operator which has better information than the client on the load and radio conditions in the cell. This results in additional gains in user perceived video quality. 3) A standard unmodified DASH client remains unaware of the proposed rewriting of the HTTP requests and can decode and play the redirected media segments. I

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