Abeni, L.

Birke, Robert Rene' Maria

Kiraly, C.

Leonardi, Emilio

Lo Cigno, R.

Mellia, Marco

Traverso, Stefano

English

PORTO Publications Open Repository TOrino

Demonstrating the Impact of P2P Streaming on
Video Quality
L. Abeni1, C. Kiraly1, R. Birke2, M. Mellia2 , E. Leonardi2, S. Traverso2, R. Lo Cigno1
1University of Trento, Italy; 2Politecnico di Torino, Italy
I. DESCRIPTION OF THE DEMO
This demonstration will present a tool that allows the
evaluation of the impact of P2P distribution on video quality,
as a function of various parameters and design choices of the
streaming system, such as:
• media-aware chunkisation with and without substreaming
vs. non-media-aware chunkisation;
• different chunk trading protocols [2];
• different chunk/peer schedulers;
• etc...
Respect to the traditional evaluation methodologies, which
are based on simulations and on the evaluation of some chunk
loss and delay characteristics, the presented tool will show
the impact on real videos, by dividing the video stream in
chunks (according to different strategies, for example the one
presented in [1]) and removing/corrupting the chunks lost
during the P2P streaming process. The resulting (corrupted
video) will be played simultaneously with the original one to
show the artefacts introduced by the P2P streaming system.
A graphical interface will allow to:
• play the original video
• configure and start the P2P diffusion process
• play the received video stream (synchronised with the
original video)
• modify some of the streaming parameters, to evaluate
their effects on the received video stream
• compute and plot performance graphs on the fly, showing
the impact of the changed parameters on various perfor-
mance metrics
The presented tool is highly modular, and can use different
software components for computing the chunks lost during the
P2P diffusion process. To keep the demo predictable (and to
limit the requirements in terms of Internet connectivity and
number of machines needed for the demo), a simulator will
be used for computing the list of chunks lost by each peer.
However, a real P2P streamer can also be used for this purpose,
and will be demonstrated if possible.
II. WHY THIS DEMO IS ATTRACTIVE TO GC10
ATTENDEES?
In the authors’ opinion, this demo is interesting for GC10
attendees because it can show in real-time the impact of
This work is supported by the European Commission through the NAPA-
WINE Project (Network-Aware P2P-TV Application over Wise Network –
www.napa-wine.eu), ICT Call 1 FP7-ICT-2007-1, 1.5 Networked Media, grant
No. 214412
different P2P streaming strategies on the video. Instead of
simply presenting some QoS metrics (that are sometimes
difficult to interpret), the video as received by a selected peer
is shown to the attendees.
This can be interesting for two main reasons:
• It immediately shows how some techniques (presented
in other GC papers) can help in improving the user
experience
• It gives an idea of how some QoS metrics relate to the
quality perceived by the user (for example, sometimes
maximising the PSNR does not really improve the video
quality)
III. EQUIPMENT AND SPACE REQUIREMENT FOR THIS
DEMO
We will bring with us the computers needed for the demo,
but having a large monitor would be useful for better showing
the videos and graphs to the attendees. We will also need two
tables and some space for 1 poster or 2.
If more computers and/or good Internet access are provided,
we will try to use a real P2P streamer application and a live
distributed swarm to derive the list of lost chunks and show
video quality.
REFERENCES
[1] KIRALY, C., AND LO CIGNO, R., AND ABENI, L. Deadline-based
Differentiation in P2P Streaming In Proceedings of IEEE Globecom
’10 Miami, FL, USA, Dec. 2010.
[2] CARTA, A., MELLIA, M., MEO, M., AND TRAVERSO, S. Efficient
Uplink Bandwidth Utilization in P2P-TV Streaming Systems In Pro-
ceedings of IEEE Globecom ’10 Miami, FL, USA, Dec. 2010.


Deadline-based Differentiation in P2P Streaming In

Efﬁcient Uplink Bandwidth Utilization in P2P-TV Streaming Systems In

Demonstrating the Impact of P2P Streaming on Video Quality

Demonstrating the Impact of P2P Streaming on Video Quality

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