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

Thomas Schierl

doi:10.1007/s11042-010-0572-5

2010-09-18

PRE

Thomas Schierl *

Yago Sánchez de la Fuente

Ralf Globisch

Cornelius Hellge

Thomas Wiegand

DOI：10.1007/s11042-010-0572-5

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摘要

En 中文

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.

Keyword:

H.264/AVC

SVC

Scalable video coding

Adaptive HTTP streaming

Mobile channels

Link interruptions

Transmission rate variation

3GPP PSS