Digital Processing Amplifier and Color Encoder

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 87, No. 1, pp. 15–19
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
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J17456
Author(s): Yoshizumi EtoCentral Research Laboratory, Hitachi Ltd., Kokubunji, Tokyo 185 Japan
Kazuyuki MatsuiCentral Research Laboratory, Hitachi Ltd., Kokubunji, Tokyo 185 Japan
Shizuka IshibashiHitachi Denshi Ltd., Shibata, Miyagi 989–16, Japan
Hiroyuki TeruiHitachi Denshi Ltd., Shibata, Miyagi 989–16, Japan
Copyright: © 1978 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Wiggin J. F. , “Gamma Correction in Live Color TV Cameras,” IEEE Trans. on Broadcasting. Vol. BC-14 , No. 1 , 8 – 13 , March 1968 . EXTERNAL

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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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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>
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