Abstract
Results are given of a study to determine the relationship between subjective picture quality and bandwidth for the 625-line television luminance signal for a range of picture material. They indicate that only a small improvement in still picture quality is to be gained by increasing pulse bandwidth beyond about 3.5 MHz. Conversely, a rapid diminution in quality results when pulse bandwidth falls below about 2 MHz. The filters used in the study were designed to have a near-optimum roll-off characteristic and to be relatively cheap and easily implemented.
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