Dominant Factors in the Network Domain That Influence the QoE of an IPTV Service

This paper presents an analysis of the effects of multiple Quality of Experience (QoE) parameters applicable to the Network domain. The aim was to investigate the best candidate parameters for model development. The Taguchi orthogonal array method was used to achieve this aim by enabling a reduction in the number of trials required in our experiments whilst maintaining accuracy of the results. This method provided us with an analysis technique to identify the most and least influential parameters for QoE. We were also able to find relationships between these different parameters. The Quality Function Deployment (QFD) method was used to verify the results obtained by the Taguchi method. We conclude that packet reorder, jitter and packet loss are the most important parameters. These parameters are almost equally important for perceptive video quality. Packet reordering emerges as the most influential parameter but statistically all three are equal. Delay was found to be the least influential parameter. Overall perceptual quality is generally adversely affected by network parameters than content domain parameters.