title: Visual quality assessment after network transmission incorporating NS2 and Evalvid.
abstract: 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.
authors.affiliation: Shijiazhuang Tiedao University, School of Information Science and Technology, Shijiazhuang 050043, China ; Jiangxi University of Finance & Economics, School of Information Technology, Nanchang 330032, China.
authors.forename: Zhengyou
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Shijiazhuang Tiedao University, School of Information Science and Technology, Shijiazhuang 050043, China.
authors.forename: Wan
authors.initials: W
authors.lastname: Wang
authors.affiliation: Shijiazhuang Tiedao University, School of Economics and Management, Shijiazhuang 050043, China.
authors.forename: Yanhui
authors.initials: Y
authors.lastname: Xia
authors.affiliation: Jiangxi University of Finance & Economics, School of Information Technology, Nanchang 330032, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Wan
authors.affiliation: Shijiazhuang Tiedao University, School of Information Science and Technology, Shijiazhuang 050043, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.affiliation: Shijiazhuang Tiedao University, School of Information Science and Technology, Shijiazhuang 050043, China.
authors.forename: Liying
authors.initials: L
authors.lastname: Li
authors.affiliation: Shijiazhuang Tiedao University, School of Information Science and Technology, Shijiazhuang 050043, China.
authors.forename: Cong
authors.initials: C
authors.lastname: Cai
mesh_terms: D003195:Computer Communication Networks / Q000458:organization & administration* / Q000592:standards; D003198:Computer Simulation; D005069:Evaluation Studies as Topic; D008962:Models, Theoretical; D019212:Multimedia / Q000592:standards*; D012815:Signal Processing, Computer-Assisted