Analysis of Psychological Factors for HDTV/3-D HDTV and Evaluation Method of Their Overall Impressions

We analyze the psychological factors of high-sensation-of-reality sequences for the HDTV and stereoscopic (3-D) HDTV. We discuss the applicability of a 1-D quality grading scale, which is used in the evaluation of picture quality, to the evaluation of their overall impressions. First, HDTV and 3-D HDTV sequences were analyzed with the semantic differential technique and factor analysis. Eight psychological factors were obtained separately for each television, and it was confirmed that naturalness extracted from the 3-D HDTV sequences was closely related to the disparity. Next, we examine whether the relationship between the opinion scores obtained using a seven-grade quality scale and the factor scores could be represented by multiple regression models. Consequently, the regression model was found to be applicable to scores for the HDTV sequences and inapplicable to those for the 3-D HDTV ones. The factor scores for naturalness (sense of naturalness) obtained from the 3-D HDTV sequences were found to have strong negative correlations with the disparities between sequences for right- and left-channels.