Network-Based Timing, Genlock and Time Code Using Precision Time Protocol
Metadata
- Publisher
- SMPTE — White Plains, NY, USA
- Doc Type
- Journal Article
- Content Type
- Original Research
- Abbreviated Title
- SMPTE Mot. Imag J.
- Volume
- 124, No. 2, pp. 16–20
- 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- ISSN
- Print:
1545-0279| Electronic:2160-2492 - Link
- https://doi.org/10.5594/j18512
- Author(s)
- Nigel Seth-Smith
bio
Nigel Seth-Smith joined Gennum, which has since been acquired by Semtech, in 2002 as part of a team responsible for Strategic New Product Definition and Business Development. He first digitized a video signal in 1977, and has been working with pictures, and the numbers which represent them, ever since. — Before joining Gennum, Seth-Smith was in R&D design and engineering management at a number of organizations, including the UKIBA, where he designed and operated the equipment used to select the sampling rate for ITU-R 601; Scientific-Atlanta, where he headed up the team that developed B-MAC, the first component-based secure satellite video transmission system; DPS, where he developed the first M-JPEG-based hard drive recorder; and Snell & Wilcox, where he managed R&D. — Seth-Smith has been a member of the Institution of Engineering and Technology since 1982, the Institute of Electrical and Electronics Engineers since 1995, and SMPTE since 2007. He has published a number of patents and papers, and has made presentations at IBC, NAB, Montreux, HD Masters, BVE, SMPTE and the International Conference on Consumer Electronics. He is currently active in standards work in SMPTE and ITU-R in the fields of UHDTV interfaces and network based genlock timing. - Copyright
- © 2015 Society of Motion Picture and Television Engineers, Inc.
Bibliographic Reference(s)
- 1. IEEE 1588-2008 , “IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems,” Institute of Electrical and Electronics Engineers , New York , 2011 . EXTERNAL
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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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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
doi: 10.5594/j18512
url: https://doi.org/10.5594/j18512
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<li> 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>