Figure 1

Principal component analysis of a database of DAM scores. PC1 comprises of temporally localized distortions consisting of SB, SF, SI, and SD, and accounts for of the variance in overall quality. PC2 comprises mostly of frequency localized distortions which consists of SH and SL and accounts for
of the variance. PC3 includes SN and ST and accounts for less than
. Note that the first two components alone account for
of the variance [4].