reference,psnr,y_psnr,vmaf,ms_ssim S4-R01,50.1,50.8,40.2,51.0 S4-R02,62.6,63.6,47.5,62.5 S4-R03,73.6,71.7,63.8,70.4 S4-R04,54.3,56.0,52.8,54.0 Min,50.1,50.8,40.2,51.0 Max,73.6,71.7,63.8,70.4 Avg,60.2,60.5,51.1,59.5