iDASH: improved Dynamic Adaptive Streaming over HTTP using Scalable Video Coding Yago Sánchez , Thomas Schierl, Cornelius Hellge, Thomas Wiegand - Fraunhofer HHI, Germany Dohy Hong - N2N Soft, France Danny De Vleeschauwer, Werner Van Leekwijck, Bell Labs - Alcatel Lucent, Belgium Yannick Lelouedec - Orange Labs FT, France
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iDASH: improved Dynamic Adaptive Streaming over HTTP …web.cs.wpi.edu/~claypool/mmsys-2011/Day3-5_idash.pdfiDASH – Yago Sánchez MMSYS-2011 SVC can be efficiently encoded to get
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iDASH: improved Dynamic Adaptive Streaming over HTTP using Scalable Video Coding
Yago Sánchez, Thomas Schierl, Cornelius Hellge, Thomas Wiegand - Fraunhofer HHI, Germany
Dohy Hong - N2N Soft, France Danny De Vleeschauwer, Werner Van Leekwijck, Bell Labs - Alcatel Lucent, Belgium
Yannick Lelouedec - Orange Labs FT, France
iDASH – Yago Sánchez MMSYS-2011
Motivation
HTTP Streaming
SVC
Caching
Results
Conclusion
OUTLINE
iDASH – Yago Sánchez MMSYS-2011
Service providers have resorted to use HTTP/TCP for Multimedia Delivery
Relying on RTP/UDP may result in traversal problems with NATs and Firewalls
Comparison of cache efficiency with MR-VoD and SVC-VoD
RESULTS-HEAVY CROSS TRAFFIC
Cache capacity (media units)
LRU CC
MR-VoD SVC-VoD MR-VoD SVC-VoD
500 30.9 % 45.6 % 42.9 % 56.6 %
1000 42.1 % 58.2 % 52.0 % 64.5 %
2000 54.6% 69.0% 61.5% 72.0%
iDASH – Yago Sánchez MMSYS-2011
00,10,20,30,40,50,60,70,80,91
0 1000 2000 3000 4000
cache-‐hit-‐ratio
cache capacity (C) [media units]
MR-‐VoDlayer1layer3SVC-‐VoDlayer2layer4
Comparison of cache efficiency with MR-VoD and SVC-VoD
RESULTS-HEAVY CROSS TRAFFIC
iDASH – Yago Sánchez MMSYS-2011
00,10,20,30,40,50,60,70,80,91
0 1000 2000 3000 4000
cache-‐hit-‐ratio
cache capacity (C) [media units]
MR-‐VoDSVC-‐VoDlayer1layer2layer3layer4
Comparison of cache efficiency with MR-VoD and SVC-VoD
RESULTS-LIGHT CROSS TRAFFIC
iDASH – Yago Sánchez MMSYS-2011
SVC can be efficiently encoded to get a high enough number of representations
HTTP-based VoD service can be easily improved by only using SVC
SVC-VoD results in a higher cache-hit-ratio and consequently in a lower traffic transmitted across the transit link between the server and the cache
Further work:
Study the enhanced adaptability, faster response times with SVC
Advantages of using SVC in DASH for Live Streaming
CONCLUSIONS
iDASH – Yago Sánchez MMSYS-2011
THANKS FOR YOUR ATTENTION!!!
Acknowledgments:
The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 248775