A Comparison of Subjective Picture Quality Evaluation Methods for Different Television Systems

摘要

This paper describes a comparison of two methods that evaluate picture quality in different television systems. One presents a pair of test sequences simultaneously on two identical HDTV monitors and the other presents them successively on a single monitor. New viewing conditions modifying the conventional ones for a single monitor are proposed, then, sensitivity to impairments in the test using two monitors is compared with that using a single monitor. The method using two monitors has merits and drawbacks, therefore, a new method containing the advantages of both methods is proposed and its validity is verified. In addition, it is clear that in the paired comparison (PC), the way in which a pair of sequences is presented may affect the assessors' opinion scores; therefore, they should be presented twice in the reverse order or in the opposite position.