Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time

Metadata

Publisher: SMPTE
Doc Type: Engineering Guideline (EG)
Abstract: This guideline specifies a set of formulas for converting between “SMPTE 12M time code” (correctly SMPTE ST 12-1 time code), MPEG-2 systems layer program clock reference (PCR) time base, and local wall clock time. Included are formulas for converting SMPTE ST 12-1 time address values and MPEG-2 PCR time base values to local wall clock time, and formulas for converting SMPTE ST 12-1 time address values directly to/from MPEG-2 PCR time base values. Local wall clock time conversion formulas are useful for converting between different frame rates of SMPTE ST 12-1 time code; e.g., a 24-fps SMPTE time code running at 23.976 fps could be converted to true time and then to a 29.97 drop frame SMPTE time code value. Finally, a discussion of how ST 12-1 time code may be carried within the coded video structures of both MPEG-2 and MPEG-4 AVC is provided.
Release Tag: 20160729-pub
Publication Date: 2016-07-29
DOI: 10.5594/SMPTE.EG40.2016
ISBN: 978-1-68303-034-8
Link: https://doi.org/10.5594/SMPTE.EG40.2016
Group: SMPTE 32NF Network/Facilities Infrastructure
Keyword(s): Communication, Networking and Broadcast Technologies, Television, Test & Measurement, Time & Sync

Latest version of SMPTE EG 40

Document Versions — SMPTE EG 40

SMPTE EG 40:2002 (2002-08-05)

[SUPERSEDED]
SMPTE EG 40:2012 (2012-11-28)

[SUPERSEDED]
▶ SMPTE EG 40:2016 (2016-07-29)

THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

AES11:2009 (r2019) [Active, Amended, Reaffirmed]
IEC.60461.2010 NOT IN REGISTRY
ISO/IEC 13818-1 [Active]
ISO 13818-2 [Active]
ISO/IEC 14496-10 [Active]
ISO/IEC 14496-2:2004 [Active, Amended]
R-REC-BT.1700 NOT IN REGISTRY
SMPTE ST 12-1:2014 [Active, Stabilized]
SMPTE ST 170:2004 [Active, Stabilized]
SMPTE ST 272:2004 [Active]
SMPTE ST 339:2015 [Active]
SMPTE ST 340:2015 [Active]

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SMPTE EG 40:2016, Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time. Available at https://doi.org/10.5594/SMPTE.EG40.2016

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SMPTE EG 40:2016, Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time. Available at https://doi.org/10.5594/SMPTE.EG40.2016

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SMPTE EG 40, Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time. Available at https://doi.org/10.5594/SMPTE.EG40

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<span class="citation"><cite>SMPTE EG 40:2016</cite>, Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time. Available at <a href="https://doi.org/10.5594/SMPTE.EG40.2016" target="_blank" rel="noopener">https://doi.org/10.5594/SMPTE.EG40.2016</a></span>

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SMPTE EG 40, Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time. Available at https://doi.org/10.5594/SMPTE.EG40

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<span class="citation"><cite>SMPTE EG 40</cite>, Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time. Available at <a href="https://doi.org/10.5594/SMPTE.EG40" target="_blank" rel="noopener">https://doi.org/10.5594/SMPTE.EG40</a></span>

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SMPTE EG 40:2016, Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time
doi: 10.5594/SMPTE.EG40.2016
url: https://doi.org/10.5594/SMPTE.EG40.2016

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<cite id="bib-smpte-eg40-2016">SMPTE EG 40:2016</cite>, Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time
<span class="doi">10.5594/SMPTE.EG40.2016</span>
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SMPTE EG 40, Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time
doi: 10.5594/SMPTE.EG40
url: https://doi.org/10.5594/SMPTE.EG40

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<cite id="bib-smpte-eg40">SMPTE EG 40</cite>, Conversion of Time Values between SMPTE ST 12-1 Time Code, MPEG-2 PCR Time Base and Absolute Time
<span class="doi">10.5594/SMPTE.EG40</span>
</li>