Priority-based transmission scheduling for delivery of scalable video coding over mobile channels

The media, especially the video delivery over mobile channels may be affected by link outages and transmission bit rate variations due to the actual channel condition and the used wireless interface. In this paper we present the use of Priority-based Transmission Scheduling of SVC media data to overcome link outages and reduction in channel bit rate in mobile networks. The Priority-based Transmission Scheduling framework aims to use the same transmission bit rate and the same overall buffer size as a traditionally streaming approach would require. In order to overcome outages and phases with reduced bit rate, a priority scheduling is used to pre-buffer larger amounts of more important data for longer playout than data with less importance for the resulting video playout quality. We compare the use of SVC with Priority-based Transmission Scheduling against H.264/AVC using temporal scalability with Priority-based Transmission Scheduling and H.264/AVC without Priority-based Transmission Scheduling. We show the benefits of using SVC in terms of received quality during outage and re-buffering time. We present a quality optimization approach for the Priority-based Transmission Scheduling and show results for different outage times.