Network-Based Timing, Genlock and Time Code Using Precision Time Protocol

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: orig-research
Abstract: Broadcast genlock is currently achieved using an analog video signal as the reference. As facilities progress toward new video formats, and also become multiformat, the use of a single analog video reference becomes progressively less appropriate. Genlock systems need to translate from the reference to the desired production format, involving complex ratios of frequency and timing. There is also no standard for the phase relationship between different video formats, although this may be important in multiformat facilities. IEEE 1588<sup>1</sup> supports the transport of time with a high degree of accuracy, and it allows that time to be defined relative to an epoch. Using this information, any video or audio format's timing can be generated reliably and consistently. IEEE 1588 allows for each application to define its own profile. SMPTE has defined a profile for broadcast facility use. This paper explores the choices involved in the profile and ways in which it can be applied to practical media synchronization applications.
Publication Date: 2015-03-01
DOI: 10.5594/j18512
Link: https://doi.org/10.5594/j18512
Author(s): Nigel Seth-Smith

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Nigel Seth-Smith; Network-Based Timing, Genlock and Time Code Using Precision Time Protocol, SMPTE Motion Imaging Journal ( Volume: 124, Issue: 2, March 2015); SMPTE, 2015. Available at https://doi.org/10.5594/j18512

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Nigel Seth-Smith; Network-Based Timing, Genlock and Time Code Using Precision Time Protocol, SMPTE Motion Imaging Journal ( Volume: 124, Issue: 2, March 2015); SMPTE, 2015. Available at https://doi.org/10.5594/j18512

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<span class="citation">Nigel Seth-Smith; <cite>Network-Based Timing, Genlock and Time Code Using Precision Time Protocol</cite>, SMPTE Motion Imaging Journal ( Volume: 124, Issue: 2, March 2015); SMPTE, 2015. Available at <a href="https://doi.org/10.5594/j18512" target="_blank" rel="noopener">https://doi.org/10.5594/j18512</a></span>

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Nigel Seth-Smith; Network-Based Timing, Genlock and Time Code Using Precision Time Protocol, SMPTE Motion Imaging Journal ( Volume: 124, Issue: 2, March 2015); SMPTE, 2015
doi: 10.5594/j18512
url: https://doi.org/10.5594/j18512

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Nigel Seth-Smith; <cite id="bib-10-5594-j18512">Network-Based Timing, Genlock and Time Code Using Precision Time Protocol</cite>, SMPTE Motion Imaging Journal ( Volume: 124, Issue: 2, March 2015); SMPTE, 2015
<span class="doi">10.5594/j18512</span>
</li>