Digital Keyers in Video Switchers and Effects Systems

Metadata

Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
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
Link: https://doi.org/10.5594/J02500
Author(s): Richard S. Bannister

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J02500.json

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

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

HTML (ISO 690 compliant)

Preview:

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>

SMPTE's HTML Pub

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>