The effect of variable S/N on the subjective evaluation of protection ratios for direct-TV satellite services
Abstract
Protection ratios, the ratio of wanted-to-unwanted signal power at the receiver input, for acceptable picture quality were experimentally evaluated for four different still pictures. The variation of carrier-to-interference, C/I, with picture impairment grade is investigated when different noise levels are present. Results are presented which show the relationship between the impairment grade and the C/I ratio for FM/TV co-channel systems under variable S/N conditions.
- Publication:
-
Canadian Domestic and International Satellite Communications Conference
- Pub Date:
- 1984
- Bibcode:
- 1984cdsc.conf...15G
- Keywords:
-
- Carrier To Noise Ratios;
- Communication Satellites;
- Electromagnetic Interference;
- Environmental Tests;
- Satellite Television;
- Signal To Noise Ratios;
- Broadcasting;
- Electronic Equipment Tests;
- Frequency Modulation;
- Noise Reduction;
- Performance Tests;
- Transmission Efficiency;
- Communications and Radar