Digital Processing Amplifier and Color Encoder

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: Digital television equipment is expected to provide higher stability and accuracy than conventional analog equipment. A new method for digitizing a processing amplifier and color encoder is proposed and developed experimentally. In color television systems, stability and accuracy are required mainly for the low-frequency component of the television signal on which color fidelity depends. With this new method, only low-frequency components of preamplifier output signals are digitized, processed, encoded and converted by an digital-to-analog converter into an NTSC signal. High-frequency components of the preamplifier output signals are mixed by an analog method and converted to the high-frequency component of a luminance signal. This signal is added directly to the digitally encoded signal to obtain a full NTSC signal. All necessary circuits including A/D and D/A converters have been experimentally implemented and provide almost the same picture quality as a PCM-encoded composite NTSC signal.
Publication Date: 1978-01-01
DOI: 10.5594/J17456
Link: https://doi.org/10.5594/J17456
Author(s): Yoshizumi Eto, Kazuyuki Matsui, Shizuka Ishibashi, Hiroyuki Terui

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Yoshizumi Eto, Kazuyuki Matsui, Shizuka Ishibashi, and Hiroyuki Terui; Digital Processing Amplifier and Color Encoder, SMPTE Journal ( Volume: 87, Issue: 1, January 1978); SMPTE, 1978. Available at https://doi.org/10.5594/J17456

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Yoshizumi Eto, Kazuyuki Matsui, Shizuka Ishibashi, and Hiroyuki Terui; Digital Processing Amplifier and Color Encoder, SMPTE Journal ( Volume: 87, Issue: 1, January 1978); SMPTE, 1978. Available at https://doi.org/10.5594/J17456

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<span class="citation">Yoshizumi Eto, Kazuyuki Matsui, Shizuka Ishibashi, and Hiroyuki Terui; <cite>Digital Processing Amplifier and Color Encoder</cite>, SMPTE Journal ( Volume: 87, Issue: 1, January 1978); SMPTE, 1978. Available at <a href="https://doi.org/10.5594/J17456" target="_blank" rel="noopener">https://doi.org/10.5594/J17456</a></span>

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<li>
Yoshizumi Eto, Kazuyuki Matsui, Shizuka Ishibashi, and Hiroyuki Terui; <cite id="bib-10-5594-j17456">Digital Processing Amplifier and Color Encoder</cite>, SMPTE Journal ( Volume: 87, Issue: 1, January 1978); SMPTE, 1978
<span class="doi">10.5594/J17456</span>
</li>