The future of television is undoubtedly internet
Protocol Television(IPTV), given its ability to give users the
ability to interact with the video they watched. The expansion
of this new diffusion technique could be promoted using
Worldwide Interoperability for Microwave Access (WiMax)
technology to serve areas not accessible by wireline
technologies. Then, with the discovery of new compression
technique such as H.265 standard, it could operate on highquality
videos. This dissertation aimed to analyze and
optimize IPTV performance using WiMax technology as an
access support and the H.265 standard as compression
standard, focusing on the choice of the more favorable buffer
size. The results obtained in the simulations show that the
buffer size customers WiMax stations to broadcast highdefinition
video must be greater than 256KB for proper
reception of images component video, and to avoid poor
visual quality.
Ravonimanantsoa Ndaohialy Manda-Vy : is a lecturer at the
University of Antananarivo in the telecommunication department;
this research axis is to the computer networks and
telecommunications networks, wired and wireless.
Reziky Zafimarina Zo Stefana : is a specialist in automatic and in
computer networks, he holds a PhD in telecommunications
Automatic specialty and is a researcher at the laboratory TASI.
Rakotomalala Mamy Alain : is a specialist wavelet applied in
telecommunication signals, he is lecturer at the University of
Antananarivo.
WiMax
IPTV
H.264
H.265
OPNET
QoS
The choice of the buffer size during Video transmission
with WiMax is crucial to ensure a desired QoS. A large
buffer size might lead to increased delay and jitter. A
sufficient size could be the cause of a packet loss which
would harm the quality of the video. The result of this
study allowed us to look at the size of 256KB buffer at a
high definition video transmission, since it avoids
considerable loss of packets with duration and satisfactory
jitter.
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