On the Subjective Evaluation of Protection-Ratios' Measurements for Co-Channel FM-TV Interference under Variable (S/N) Ratios

The relation between the image impairment grade and the ratio of wanted-to-interference, known as C/I power ratios, for FM co-channel television systems is studied. The variation of C/I ratio with picture impairment grade is investigated for different noise levels, through a series of experiments.