PSNRr,f -MOSr: An easy-to-compute multiuser perceptual video quality measure

摘要

In this paper, we propose a new statistical objective perceptual video quality measure PSNR_r,f-MOSr. PSNR_r,f is defined as the PSNR achieved by f% of the frames in each one of the r% of the transmissions over a network. This quantity has the potential to capture the performance loss due to damaged frames in a particular video sequence (f%), as well asto indicate the probablity of a user experiencing a specified quality over the channel (r%). The percentage of transmissions also has the interpretation as what percentage out of many video users who access the same channel, would experience a given video quality. A subjective experiment is conducted to establish a linear equation connecting PSNR_r,f=90% and MOS_r, the mean opinion score (MOS) achieved by r% of the transmissions. It is shown from this subjective experiment that PSNR_f=90% correlates much better with the delivered perceptual video quality than the average PSNR across all frames of a video, and is a good representation of perceptual quality of a video transmitted over networks with possible transmission errors.