Publisher DOI: 10.1109/GLOCOM.2010.5683141
Title: Adaptive Temporal Scalability of H.264-compliant Video Conferencing in Heterogeneous Mobile Environments
Language: English
Authors: Cycon, Hans L. 
Hege, Gabriel 
Marpe, Detlev 
Palkow, Mark 
Schmidt, Thomas C.  
Wählisch, Matthias 
metadata.local.contributorCorporate.other: Institute of Electrical and Electronics Engineers 
IEEE Communications Society 
Issue Date: 2010
Publisher: IEEE
Part of Series: 2010 IEEE Global Telecommunications Conference (GLOBECOM 2010) : Miami, Florida, USA, 6 - 10 December 2010 
Conference: IEEE Global Telecommunications Conference 2010 
Abstract: 
In this paper, we present a multipoint video conferencing system that adapts to heterogeneous members including mobiles. The system is built upon a low complexity scalable extension of our H.264 codec DAVC, and a congestion-aware dynamic adaptation layer. Our temporally scaled video codec DSVC has the same RD performance as the non-scaled version with comparable configuration. We achieve this by QP cascading, i.e., assigning gradually refining quantization parameters to the declining temporal layers. We present and analyse a mobile-compliant version of DSVC at reduced complexity that still admits comparable performance. Finally, we report on early work of dynamic layer tuning. Derived of delay variation measures, senders exploit scalable video layering to adapt the video transmission to varying network conditions. Initial results indicate that video performance remains close to optimal.
URI: http://hdl.handle.net/20.500.12738/2741
ISBN: 978-1-4244-5636-9
978-1-4244-5638-3
Institute: Department Informatik 
Fakultät Technik und Informatik 
Type: Chapter/Article (Proceedings)
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