Perceptibility of Vertical Unsteadiness in Television Display of Motion-Picture Films
R. G. Gilbert, John C. Norris, H. D. Wood · Journal of the SMPTE · 1973
The perceptibility of vertical unsteadiness in TV presentations was evaluated using still scenes (35mm slides) and moving scenes (16mm motion pictures) projected through a telecine chain. Sinusoidal disturbances having peak-to-peak amplitude of 0.1 to 1.0% of the image height, over a frequency range from 1.0 Hz to 15 Hz, were introduced into the televised scenes. Acceptability of the televised image was judged by an audience representing a cross section of Eastman Kodak Co. employees. The results demonstrate that the most critical frequencies are between 3 Hz and 6 Hz. At these frequencies, the audience rated image quality acceptable for unsteadiness amplitudes less than 0.2% peak-to-peak for still scenes and less than 0.3% peak-to-peak for moving scenes.