Performance evaluation of a perceptual ringing distortion metric for digital video

This paper evaluates a perceptual impairment measure for ringing artifacts, which are common in hybrid MC/DPCM/DCT coded video, as a predictor of the mean opinion score (MOS) obtained in the standard subjective assessment. The perceptual ringing artifacts measure is based on a vision model and a ringing distortion region segmentation algorithm, which is converted into a new perceptual ringing distortion metric (PRDM) on a scale of 0 to 5. This scale corresponds to a modified double-stimulus impairment scale variant II (DSIS-II) method. The Pearson correlation, the Spearman rank order correlation and the average absolute error are used to evaluate the performance of the PRDM compared with the subjective test data. The results show a strong correlation between the PRDM and the MOS with respect to ringing artifacts.