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SMPTE Journal ( Volume: 100, Issue: 3, March 1991)
[ACTIVE]

Digital Keyers in Video Switchers and Effects Systems

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
SMPTE J
Volume
100, No. 3, pp. 178–180
Abstract
Designing a digital video production switcher by simply copying the analog building blocks, adder for adder, multiplier for multiplier, can have inferior results. Digital technology offers opportunities for improvements that were not possible with analog circuitry. This article focuses on keyers and first explains how a keyer works in an analog switcher. It then shows how this implementation can result in jagged key edges in a digital keyer and presents a solution that can eliminate this problem. Self-keyers are discussed and a digital keyer that eliminates key fringing is presented.
Publication Date
1991-03-01
DOI
10.5594/J02500
ISSN
Print: 0036-1682
Link
https://doi.org/10.5594/J02500
Author(s)
Richard S. BannisterProduction Systems Division of The Grass Valley Group, Inc., Grass Valley. CA 95945.
Copyright
© 1991 Society of Motion Picture and Television Engineers, Inc.
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Richard S. Bannister; Digital Keyers in Video Switchers and Effects Systems, SMPTE Journal ( Volume: 100, Issue: 3, March 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02500
Snippet:
Richard S. Bannister; Digital Keyers in Video Switchers and Effects Systems, SMPTE Journal ( Volume: 100, Issue: 3, March 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02500

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Richard S. Bannister; Digital Keyers in Video Switchers and Effects Systems, SMPTE Journal ( Volume: 100, Issue: 3, March 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02500
Snippet:
<span class="citation">Richard S. Bannister; <cite>Digital Keyers in Video Switchers and Effects Systems</cite>, SMPTE Journal ( Volume: 100, Issue: 3, March 1991); SMPTE, 1991. Available at <a href="https://doi.org/10.5594/J02500" target="_blank" rel="noopener">https://doi.org/10.5594/J02500</a></span>

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Preview:
Richard S. Bannister; Digital Keyers in Video Switchers and Effects Systems, SMPTE Journal ( Volume: 100, Issue: 3, March 1991); SMPTE, 1991
doi: 10.5594/J02500
url: https://doi.org/10.5594/J02500
Snippet:
<li>
Richard S. Bannister; <cite id="bib-10-5594-j02500">Digital Keyers in Video Switchers and Effects Systems</cite>, SMPTE Journal ( Volume: 100, Issue: 3, March 1991); SMPTE, 1991
<span class="doi">10.5594/J02500</span>
</li>

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