Priority-based Media Delivery using SVC with RTP and HTTP streaming

Authors:
Thomas Schierl;Yago Sanchez De La Fuente;Ralf Globisch;Cornelius Hellge;Thomas Wiegand
Affiliations:
Image Communication Group, Image Processing Department, Fraunhofer HHI, Berlin, Germany 10587 and Image Communication Group Department of Telecommunication Systems, Technische Universität Ber ...;Image Communication Group Department of Telecommunication Systems, Technische Universität Berlin, Berlin, Germany 10587 and Image Communication Group, Image Processing Department, Fraunhofer ...;Image Communication Group, Image Processing Department, Fraunhofer HHI, Berlin, Germany 10587;Image Communication Group Department of Telecommunication Systems, Technische Universität Berlin, Berlin, Germany 10587 and Image Communication Group, Image Processing Department, Fraunhofer ...;Image Communication Group, Image Processing Department, Fraunhofer HHI, Berlin, Germany 10587 and Image Communication Group Department of Telecommunication Systems, Technische Universität Ber ...
Venue:
Multimedia Tools and Applications
Year:
2011

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Abstract

Media delivery, especially video delivery over mobile channels may be affected by transmission bitrate variations or temporary link interruptions caused by changes in the channel conditions or the wireless interface. In this paper, we present the use of Priority-based Media Delivery (PMD) for Scalable Video Coding (SVC) to overcome link interruptions and channel bitrate reductions in mobile networks by performing a transmission scheduling algorithm that prioritizes media data according to its importance. The proposed approach comprises a priority-based media pre-buffer to overcome periods under reduced connectivity. The PMD algorithm aims to use the same transmission bitrate and overall buffer size as the traditional streaming approach, yet is more likely to overcome interruptions and reduced bitrate periods. PMD achieves longer continuous playback than the traditional approach, avoiding disruptions in the video playout and therefore improving the video playback quality. We analyze the use of SVC with PMD in the traditional RTP streaming and in the adaptive HTTP streaming context. We show benefits of using SVC in terms of received quality during interruption and re-buffering time, i.e. the time required to fill a desired pre-buffer at the receiver. We present a quality optimization approach for PMD and show results for different interruption/bitrate-reduction scenarios.