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ThinkMind // International Journal On Advances in Telecommunications, volume 3, numbers 3 and 4, 2010 // View article tele_v3_n34_2010_2


Improving IPTV QoE taking the suitable MPEG-2/MPEG-4 Quantizer based on Jitter, Delay and lost packets measurements

Authors:
Alejandro Canovas
Miguel Garcia
Jaime Lloret
Marcelo Atenas
Rafael Rizo

Keywords: MPEG-2/MPEG-4 Quantizer, Video Quality, IPTV.

Abstract:
The main issue in Digital Terrestrial Television and in IPTV networks is the Quality of Experience received by the end users. For this reason, mechanisms to automatically measure the video quality of the images received by the user are needed. In this paper, we analyze video quantization in order to determine an optimal quantizer_scale factor value for its transmission. Then, it is used as an automatic measure to improve the video quality received by the end user. The paper shows the measurements taken for Objective and subjective Video Quality, Video Quality Metric and the bandwidth consumed for several types of video quality. We use the jitter, delay and lost packets measurements in order to take the appropriate quantizer. Finally, we show the visual comparison between a high quantizer_scale factor and a reference video. Our work shows that an optimal quantizer_scale factor can be used to save bandwidth in an IPTV network or to improve the Video Quality for the same bandwidth consumption. Finally, we present some discussions of the measurements gathered and some comments of other authors.

Pages: 16 to 26

Copyright: Copyright (c) to authors, 2010. Used with permission.

Publication date: April 6, 2011

Published in: journal

ISSN: 1942-2601

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