Video signal noise characteristics with regard to scanning method

The evaluation of a television system is finally verified through the subjective assessment of the picture quality on a display. A system evaluation method has been studied in terms of the picture quality degraded by random noise added through a transmission line, using a weighted signal-to-noise ratio considering the human visual characteristics, and an unweighted signal-to-noise ratio, that is, a physical signal-to-noise ratio. In this paper, the relation between the quantity of random noise added through the transmission line and the quantity of random noise on a display is provided in a television system using either an interlace scanning method or a progressive scanning method, and the change in noise characteristics through an interlace-to-progressive scanning conversion is analyzed. Furthermore, the change in noise characteristics mediated by the human visual system is investigated, and finally, these studies and analyses are verified through subjective assessment