HDTV and NTSC Transmission Using Direct Digital Synthesis

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: The technique of direct digital synthesis (DDS) is now available to the commercial marketplace. The DDS technique has several inherent features that render it of particular interest to HDTV transmission systems. Among these features are the following: numeric AM, FM, and/or PM with outstanding linearity; excellent spectral purity; digitally controlled predistortion; single-sideband generation by digital phasing; vestigial sideband generation by digital phasing; easy NTSC-to-HDTV conversion (software); and compatibility with any HDTV format (software). Once the HDTV signal has been digitized, it is fed to a circuit consisting of three integrated circuits (ICs). The output of the digital-to-analog (D/A) converter is the desired radio frequency (RF) waveform between 10 and 20 MHz. This RF signal is then upconverted to the desired TV channel through standard heterodyning techniques.
Publication Date: 1991-12-01
DOI: 10.5594/J02380
Link: https://doi.org/10.5594/J02380
Author(s): Robert J. Zavrel

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Robert J. Zavrel; HDTV and NTSC Transmission Using Direct Digital Synthesis, SMPTE Journal ( Volume: 100, Issue: 12, December 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02380

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Robert J. Zavrel; HDTV and NTSC Transmission Using Direct Digital Synthesis, SMPTE Journal ( Volume: 100, Issue: 12, December 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02380

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Robert J. Zavrel; HDTV and NTSC Transmission Using Direct Digital Synthesis, SMPTE Journal ( Volume: 100, Issue: 12, December 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02380

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<span class="citation">Robert J. Zavrel; <cite>HDTV and NTSC Transmission Using Direct Digital Synthesis</cite>, SMPTE Journal ( Volume: 100, Issue: 12, December 1991); SMPTE, 1991. Available at <a href="https://doi.org/10.5594/J02380" target="_blank" rel="noopener">https://doi.org/10.5594/J02380</a></span>

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Robert J. Zavrel; HDTV and NTSC Transmission Using Direct Digital Synthesis, SMPTE Journal ( Volume: 100, Issue: 12, December 1991); SMPTE, 1991
doi: 10.5594/J02380
url: https://doi.org/10.5594/J02380

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<li>
Robert J. Zavrel; <cite id="bib-10-5594-j02380">HDTV and NTSC Transmission Using Direct Digital Synthesis</cite>, SMPTE Journal ( Volume: 100, Issue: 12, December 1991); SMPTE, 1991
<span class="doi">10.5594/J02380</span>
</li>