Video Quality Analysis for Mobile Video Telephony over LTE

With explosive growth of mobile video applications, analysis of video quality becomes increasingly important because it is an important Key Performance Indicator for Quality of Experience. In this paper, a method for non-reference video quality analysis is proposed and applied to Video Telephony (VT) in LTE networks. Three metrics, blockiness, blur and freezing, are used to estimate the MOS score. Blockiness is detected by taking the H.264 codec features into account, blur is estimated by utilizing the percentage of noticeable blurred edges in each frame, and freezing is evaluated by using a sigmoid function to mimic the effect of different freezing duration on the Human Visual System (HVS). Furthermore, the three metrics are integrated into one objective MOS score by considering different weight of the metric for HVS and using the polynomial curve fitting. Above 90% correlation is achieved between the objective MOS score and subjective MOS score.