Parametric packet-layer video quality model for IPTV

Abstract

This paper presents a parametric packet-layer model for predicting perceived quality of High Definition (HD, 1920 × 1080) and Standard Definition (SD, 720 × 576) videos for IPTV services. The model can be applied both for network planning and service monitoring. It takes as input the video resolution, packet-layer information such as bit-rate, packet-loss-rate and burstiness factor, and information on the encoder/decoder settings such as the number of slices per frame and the packet-loss-concealment. Addressed degradations are compression artifacts related to H.264 and MPEG2 encoding, and transmission errors leading to slicing errors or freezing, depending on the applied packet-loss-concealment. Extensive subjective video quality tests have been conducted for measuring the perceived quality of the original and degraded video sequences. The model is developed based on the obtained test results. The model prediction shows a correlation of 0.98 for HD and 0.96 for SD with the mean subjective ratings.