An end-to-end testbed for scalable video streaming to mobile devices over HTTP

Abstract

We design, implement, and evaluate an H.264/SVC decoder and an HTTP video streaming client on multi-core mobile devices. The decoder employs multiple decoder threads to leverage the multi-core CPUs, and the streaming server/client support adaptive HTTP video streaming. To evaluate the decoder performance, we conduct experiments using real H.264/SVC videos on a tablet and a smart phone running Android 4.0. Our experimental results demonstrate that real-time H.264/SVC decoding is feasible on multi-core mobile devices. For example, for 960x544 videos, our decoder achieves up to 20.72 FPS (Frame-Per-Second), and for 480x272 videos, it achieves up to 42.03 FPS. We also conduct extensive HTTP video streaming experiments over live WiFi and 3G cellular networks, which show that high frame rate (up to ∼42 FPS), and short initial delay (as small as ∼2.5 sec) are possible. We make our testbed publicly available to the research communities.

A Synchronization Scheme for Hierarchical Video Streams over Heterogeneous Networks

“…In this test, d is set to two seconds and BW is calculated to be 7,500Kbps. As a result of streaming using DASH-SVC and the proposed scheme, only BL arrives at the decoding buffer in the case of DASH-SVC [15][16] [17]. DASH-SVC cannot synchronize the BL and EL segments because it select the incorrect segment of EL.…”