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SMPTE Journal ( Volume: 105, Issue: 2, February 1996)
[ACTIVE]

A Proposal for Compatibly Improving the Scrambling of SMPTE 259M

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
SMPTE J
Volume
105, No. 2, pp. 83–94
Abstract
A method has been devised that will inhibit the generation of pathological serial digital signals or other serial signals with poor statistics that adversely affect clock recovery and cable equalization. This is accomplished by adaptively dithering the least significant bit (LSB) of certain video words only when such a pattern of poor statistics would otherwise occur. LSB dither will not be visible on picture monitors. Furthermore, the dither will occur very infrequently. A complementary descrambler has been developed that will reverse the dither when it occurs. The circuitry that accomplishes these goals is simple. There is no additional time delay introduced by the improved scrambling algorithm. The primary advantage of this system is that the serial digital signal is made much more robust.
Publication Date
1996-02-01
DOI
10.5594/J04669
ISSN
Print: 0036-1682
Link
https://doi.org/10.5594/J04669
Author(s)
David L. HershbergerContinental Electronics Corp., Dallas, TX 75227.
bio
David L. Hershberger BA in mathematics from Goshen College and BS and MS degrees in electrical engineering from the University of Illinois. He is a principal engineer for Continental Electronics Corp., headquartered in Dallas, Tex., which is involved in the research, design, and manufacture of special-purpose, super-power RF energy systems, as well as broadcast and communication transmitters. At the time this paper was written, Hershberger was with The Grass Valley Group, Inc. (GVG), Grass Valley, Calif. At GVG he developed serial digital video circuit implementations and designed the custom GVG serial digital chip set. In his spare time he produces DSP noise-reduction systems for the amateur radio market.
Copyright
© 1996 Society of Motion Picture and Television Engineers, Inc.

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David L. Hershberger; A Proposal for Compatibly Improving the Scrambling of SMPTE 259M, SMPTE Journal ( Volume: 105, Issue: 2, February 1996); SMPTE, 1996. Available at https://doi.org/10.5594/J04669
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David L. Hershberger; A Proposal for Compatibly Improving the Scrambling of SMPTE 259M, SMPTE Journal ( Volume: 105, Issue: 2, February 1996); SMPTE, 1996. Available at https://doi.org/10.5594/J04669

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David L. Hershberger; A Proposal for Compatibly Improving the Scrambling of SMPTE 259M, SMPTE Journal ( Volume: 105, Issue: 2, February 1996); SMPTE, 1996. Available at https://doi.org/10.5594/J04669
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<span class="citation">David L. Hershberger; <cite>A Proposal for Compatibly Improving the Scrambling of SMPTE 259M</cite>, SMPTE Journal ( Volume: 105, Issue: 2, February 1996); SMPTE, 1996. Available at <a href="https://doi.org/10.5594/J04669" target="_blank" rel="noopener">https://doi.org/10.5594/J04669</a></span>

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Preview:
David L. Hershberger; A Proposal for Compatibly Improving the Scrambling of SMPTE 259M, SMPTE Journal ( Volume: 105, Issue: 2, February 1996); SMPTE, 1996
doi: 10.5594/J04669
url: https://doi.org/10.5594/J04669
Snippet:
<li>
David L. Hershberger; <cite id="bib-10-5594-j04669">A Proposal for Compatibly Improving the Scrambling of SMPTE 259M</cite>, SMPTE Journal ( Volume: 105, Issue: 2, February 1996); SMPTE, 1996
<span class="doi">10.5594/J04669</span>
</li>