Percived DU Ratio' in the Quantification of the Subjective Evaluation of TV Pictures Impaired by Multiple Ghosts

Abstract

For objective and quantitative measurement of subjective quality of TV pictures impaired by multiple ghosts, 'Perceived DU Ratio' (PDUR) has been proposed in this paper. It is defined as the power sum of levels of individual ghost (D/U), weighted by subjective effects due to r. f. phase (φ) and delay time (τ).
Such physical quantities of actual ghosts as D/U, p, v and number of ghosts (n) have been measured for 186 samples in the field, and 'PDUR' has been calculated from these results for each sample. Subjective tests have also made for each picture recorded by a video tape recorder.
From the statistical results by using the Theory of Quantification, it has become clear that partial correlation coefficient between 'PDUR' and the results of subjective tests using 5-point comment scale is more than 0. 8. In the case of the standard picture defined in this paper, 'Mean Opinion Score NOSY can be estimated from 'PDUR'.