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The Scientific World Journal
Volume 2014, Article ID 267403, 7 pages
Research Article

Visual Quality Assessment after Network Transmission Incorporating NS2 and Evalvid

1Shijiazhuang Tiedao University, School of Information Science and Technology, Shijiazhuang 050043, China
2Jiangxi University of Finance & Economics, School of Information Technology, Nanchang 330032, China
3Shijiazhuang Tiedao University, School of Economics and Management, Shijiazhuang 050043, China

Received 9 October 2013; Accepted 4 December 2013; Published 15 April 2014

Academic Editors: W. Sun, G. Zhang, and J. Zhou

Copyright © 2014 Zhengyou Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


On the basis of Evalvid tool integrated in NS2 (Network Simulator version 2), the paper gets new set of tools, myEvalvid, to establish the simulation and evaluation platform for multimedia transmission. Then the paper investigates the effects of various influence factors when multimedia information is transmitted in the network and the relationships among these factors. Based on the analysis, the paper gets different evaluation models, respectively. In this paper, we study the impact on performance of several basic source and network parameters of video streams, namely, GOP (Group of Pictures) pattern, compression quantitative parameters, packet length, and packet error rate. Simulation results show that different parameters lead to different distortion levels which are calculated according to the reconstruction images at the receiver and the original images. The experimental results show that the video transmission and quality evaluation model we designed can evaluate multimedia transmission performance over complex environment very well.