Subjective Effects of Differential Gain and Differential Phase Distortions in NTSG Color Television Pictures

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: Differential gain (DG) and differential phase (DP) are measures of the variation in the amplitude and phase, respectively, of the chrominance signal with changes in the amplitude of the luminance signal. The effect of DG and DP distortions are to change the color saturations and hue of the transmitted color in an NTSC TV signal. Subjective evaluations of the impairing effects of DG and DP are necessary in order to establish acceptable limits on TV transmission. Subjective tests were designed to obtain the subjective evaluations of different types and magnitudes of DG and DP distortions. The results of these tests indicate that the mean levels of DP which are rated “just perceptible” or better range from approximately 7° to over 18° depending on the type of DP distortion studied. Similarly, the mean levels of DG which were rated “just perceptible” or better range from approximately 2.4 dB to 3.7 dB depending on the type of DG distortion tested.
Publication Date: 1971-08-01
DOI: 10.5594/J05765
Link: https://doi.org/10.5594/J05765
Author(s): John R. Cavanaugh, Anthony M. Lessman

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John R. Cavanaugh and Anthony M. Lessman; Subjective Effects of Differential Gain and Differential Phase Distortions in NTSG Color Television Pictures, Journal of the SMPTE ( Volume: 80, Issue: 8, August 1971); SMPTE, 1971. Available at https://doi.org/10.5594/J05765

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John R. Cavanaugh and Anthony M. Lessman; Subjective Effects of Differential Gain and Differential Phase Distortions in NTSG Color Television Pictures, Journal of the SMPTE ( Volume: 80, Issue: 8, August 1971); SMPTE, 1971. Available at https://doi.org/10.5594/J05765

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<span class="citation">John R. Cavanaugh and Anthony M. Lessman; <cite>Subjective Effects of Differential Gain and Differential Phase Distortions in NTSG Color Television Pictures</cite>, Journal of the SMPTE ( Volume: 80, Issue: 8, August 1971); SMPTE, 1971. Available at <a href="https://doi.org/10.5594/J05765" target="_blank" rel="noopener">https://doi.org/10.5594/J05765</a></span>

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<li>
John R. Cavanaugh and Anthony M. Lessman; <cite id="bib-10-5594-j05765">Subjective Effects of Differential Gain and Differential Phase Distortions in NTSG Color Television Pictures</cite>, Journal of the SMPTE ( Volume: 80, Issue: 8, August 1971); SMPTE, 1971
<span class="doi">10.5594/J05765</span>
</li>