A MULTIDIMENSIONAL EVALUATION OF THE PERCEPTUAL QUALITY OF TELEVISIONSETS

This paper discusses the relative importance of various perceptual att ributes in overall perceived picture quality while using some current television sets. The experiments included six 28-in. television sets v arying in spatial resolution, color reproduction, peak luminance, and luminance contrast. Observers were asked to judge 15 perceptual attrib utes on the television sets using a 10-point categorical scale. Multid imensional scaling procedures were applied to the data in order to fin d clusters of attributes and to obtain a graphical representation of t he results. Relating to the physical changes as applied in this experi ment, it was found that color rendering was the most important factor in the comparison, favoring a more reddish color setting, followed by perceived sharpness. When subjects do not like the color rendition of a television set, other differences between the sets are not considere d relevant by them unless these differences are substantial. Thus, the relationships between average scores found for the quality-related at tributes and physical quantities as measured on the television sets we re influenced by perceived color differences between the sets.