AG Technische Informatik

Adaptive Temporal Scalability of H.264-compliant Video Conferencing in Heterogeneous Mobile Environments

Matthias Wählisch, Hans L. Cycon, Gabriel Hege, Detlev Marpe, Mark Palkow, Thomas C. Schmidt— 2010

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.

TitelAdaptive Temporal Scalability of H.264-compliant Video Conferencing in Heterogeneous Mobile Environments
VerfasserMatthias Wählisch, Hans L. Cycon, Gabriel Hege, Detlev Marpe, Mark Palkow, Thomas C. Schmidt
VerlagProc. of IEEE GLOBECOM 2010, Piscataway, NJ, USA: IEEE Press, December 2010
Datum201012
Quelle/n
Spracheeng
ArtText
BibTeX Code@inproceedings{chmps-atshv-10, author = {Hans L. Cycon and Gabriel Hege and Detlev Marpe and Mark Palkow and Thomas C. Schmidt and Matthias W{\"a}hlisch}, title = {{Adaptive Temporal Scalability of H.264-compliant Video Conferencing in Heterogeneous Mobile Environments}}, booktitle = {Proc. of IEEE GLOBECOM 2010}, year = {2010}, address = {Piscataway, NJ, USA}, month = {December}, publisher = {IEEE Press}, 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.}, file = {../papers/chmps-atshv-10.pdf}, location = {Miami, Florida, USA} }