Chrominance/Luminance Crosstalk in Cable Television Demodulators

Metadata

Publisher: SMPTE — White Plains, NY
Doc Type: Conference Paper
Content Type: Original Research
Volume: 1970, No. 24, pp. 56–67
Abstract: Cable television systems frequently employ demodulators as part of their head-end equipment which convert the UHF or VHF-TV signal to video. Distortions of this (video) signal cannot generally be corrected. In the case of color TV signals, distortion changes the luminance level; it always is decreased in the case of the negative modulation. Quadrature distortion also is a systematic and fundamental source of differential gain, chrominance gain being reduced as the luminance level increases. When the cable television demodulator and the home receiver both contribute to the distortion, they are additive. The interrelationships of luminance errors and differential gain in terms of both luminance level and chrominance level are outlined for several different IF response characteristics. A new test signal to measure the luminance distortion and its application is discussed. Other methods are reviewed.
Publication Date: 1970-10-01
DOI: 10.5594/M00697
Link: https://doi.org/10.5594/M00697
Author(s): Charles W. Rhodes
Copyright: © 1970 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

(1) Nyquist H. Pfleger K. W. , “Effects of the Quadrature Component in Single Sideband Transmission.” Bell System Technical Journal , Vol 19 , p.p. 63 – 73 , January - 1940 . EXTERNAL
(2) Loughlin B. , “Color Signal Distortion in Envelope Type of Second Detectors,” IRE, Transactions on Broadcast and Television Receivers , p.p. 81 – 93 , October 1957 . EXTERNAL
(3) Dinsel S. , “Quadrature Distortion Correction for TV Vestigial Sideband transmission,” Journal of SMPTE , Vol 75 , Jan 1966 , pg 20 . EXTERNAL

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Charles W. Rhodes; Chrominance/Luminance Crosstalk in Cable Television Demodulators, SMPTE Meetings and Conferences ( October 1970); SMPTE, 1970. Available at https://doi.org/10.5594/M00697

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Charles W. Rhodes; Chrominance/Luminance Crosstalk in Cable Television Demodulators, SMPTE Meetings and Conferences ( October 1970); SMPTE, 1970. Available at https://doi.org/10.5594/M00697

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Charles W. Rhodes; Chrominance/Luminance Crosstalk in Cable Television Demodulators, SMPTE Meetings and Conferences ( October 1970); SMPTE, 1970. Available at https://doi.org/10.5594/M00697

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<span class="citation">Charles W. Rhodes; <cite>Chrominance/Luminance Crosstalk in Cable Television Demodulators</cite>, SMPTE Meetings and Conferences ( October 1970); SMPTE, 1970. Available at <a href="https://doi.org/10.5594/M00697" target="_blank" rel="noopener">https://doi.org/10.5594/M00697</a></span>

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Charles W. Rhodes; Chrominance/Luminance Crosstalk in Cable Television Demodulators, SMPTE Meetings and Conferences ( October 1970); SMPTE, 1970
doi: 10.5594/M00697
url: https://doi.org/10.5594/M00697

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<li>
Charles W. Rhodes; <cite id="bib-10-5594-m00697">Chrominance/Luminance Crosstalk in Cable Television Demodulators</cite>, SMPTE Meetings and Conferences ( October 1970); SMPTE, 1970
<span class="doi">10.5594/M00697</span>
</li>