Considerations When Designing for the SMPTE 424M Interface

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE Mot. Imag. J
Volume: 118, No. 4, pp. 39–42
Abstract: When SMPTE 424M, the standard for a 3 Gbit/sec serial digital interface (SDI) was introduced, much of what was standardized was similar to the HD-SDI interface that is so well established and understood. The assumption of many early adopters of this standard was that the same architectures used to build 3 Gbit/sec equipment could be used for HD-SDI, and then studios could be built with this equipment in order to support the higher definition formats. Unfortunately, when SMPTE 424M was approved, it included a relaxed jitter specification, allowing up to 0.3 unit interval (UI) of alignment jitter rather than the 0.2 UI, which is permitted in SMPTE 292M—the HD-SDI specification. This paper explores the consequences of this relaxed specification on system performance and looks at new architectures for studio equipment that are able to better tolerate the increased jitter. The fact that studio designers may want to look more closely at some performance measurements of 3 Gbit/sec equipment rather than just looking for SMPTE 424M compliance is also discussed.
Publication Date: 2009-05-01
DOI: 10.5594/J14943
ISSN: Print: 1545-0279 | Electronic: 2160-2492
Link: https://doi.org/10.5594/J14943
Author(s): Mark Sauerwald
bio
Mark Sauerwald has been involved in semiconductor components for digital video—first at TRW LSI products, working on A/D converters for digital video, then at Comlinear, later acquired by National Semiconductor. Sauerwald spent a few years working for Gennum Corp. before returning to National Semiconductor where he now works as an applications engineer with the Interface Products Group. Sauerwald graduated from the University of California at San Diego in 1982 with a bachelor's degree in electrical engineering.
Copyright: © 2009 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. SMPTE 424M-2006 , “3 Gb/s Signal/Data Serial Interface,” www.smpte.org . EXTERNAL
2. SMPTE 259M-2008 , “Television—SDTV Digital Signal/Data—Serial Digital Interface,” www.smpte.org . EXTERNAL
3. SMPTE 292–2008 , “1.5 Gb/s Signal / Data Serial Interface,” www.smpte.org . EXTERNAL

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Mark Sauerwald; Considerations When Designing for the SMPTE 424M Interface, SMPTE Motion Imaging Journal ( Volume: 118, Issue: 4, 2009); SMPTE, 2009. Available at https://doi.org/10.5594/J14943

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Mark Sauerwald; Considerations When Designing for the SMPTE 424M Interface, SMPTE Motion Imaging Journal ( Volume: 118, Issue: 4, 2009); SMPTE, 2009. Available at https://doi.org/10.5594/J14943

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Mark Sauerwald; Considerations When Designing for the SMPTE 424M Interface, SMPTE Motion Imaging Journal ( Volume: 118, Issue: 4, 2009); SMPTE, 2009. Available at https://doi.org/10.5594/J14943

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<span class="citation">Mark Sauerwald; <cite>Considerations When Designing for the SMPTE 424M Interface</cite>, SMPTE Motion Imaging Journal ( Volume: 118, Issue: 4, 2009); SMPTE, 2009. Available at <a href="https://doi.org/10.5594/J14943" target="_blank" rel="noopener">https://doi.org/10.5594/J14943</a></span>

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Mark Sauerwald; Considerations When Designing for the SMPTE 424M Interface, SMPTE Motion Imaging Journal ( Volume: 118, Issue: 4, 2009); SMPTE, 2009
doi: 10.5594/J14943
url: https://doi.org/10.5594/J14943

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Mark Sauerwald; <cite id="bib-10-5594-j14943">Considerations When Designing for the SMPTE 424M Interface</cite>, SMPTE Motion Imaging Journal ( Volume: 118, Issue: 4, 2009); SMPTE, 2009
<span class="doi">10.5594/J14943</span>
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