Subjective evaluation of the interference protection ratio for frequency modulated NTSC television signals

The future environment of broadcasting satellites may well be governed by the limiting factor of interference between television signals from neighboring satellites. A program of tests was performed to evaluate subjectively the effect of aggregate interference and/or noise on the impairment of television pictures. Up to four interfering channels were added in an environment resembling that of future broadcasting satellites including up to two co-frequency channels and up to two adjacent channels. The results of these tests are considered valuable in the study of the quality standard for the RARC-83 for the planning of the broadcasting satellite service.