Video: Beyond SMPTE Time Code — the TLX Project

SMPTE Timecode, created in the 1970s, has been a tremendous success – so is there reason to reinvent it? SMPTE says yes, and SMPTE Fellow Peter Symes explains why.

SMPTE Timecode is in constant use globally in the broadcast industry, but also in many other industries. The standard SMPTE ST12 is still much he same as the first version of the standard, but it has been updated over the years to deal with new frame rates and to adapt to new technology. However there are limits to what it can achieve without being re-defined and some of the original technologies and restrictions that originally guided the way it was created are outdated and superseded.

Peter Symes explains the TLX project which is in progress to create a successor to ‘SMPTE Timecode’. The new requirements pushing the TLX project forward are moving away from ST 12’s audio-based format, supporting any frame rate, having no 24-hour duration limit and work with the legacy timecode.

TLX stands for Time Label Extensible and is delivering on its promise of an extensible standard – as so many are nowadays – and already has ways of working with ST 2059 (PTP synchronisation) and ST 2110 (for uncompressed video over IP).

Watch now, and find out more!


Peter Symes Peter Symes
SMPTE Fellow

Video: Beyond SMPTE Time Code – the TLX Project

SMPTE Time Code started off in the 1970s and has evolved yet in some ways remained unchanged. It is key to electronic video editing, and has found application in many other fields and industries including live events. This is Armin Van Buren explaining how he uses SMPTE timecode in his live DJ sets.

The more we push technology, the more we demand form timecode, so now there is the TLX project (Time Label, eXtensible) which seeks to define a new labelling system.

The webinar will provide an overview of the emerging design, and is intended to provide a preview for potential users, and to encourage participation by those with expertise to offer.

Peter Symes, the host, covers:

  • The history of timing
  • What SMPTE ST 12 is and its evolution
  • The concept of TLX
  • Use of PTP & provision for extensibility
  • What types of data can TLX convey
  • Q&A!

Watch now to hone your knowledge of the SMPTE timecode that already exists and to get ready to understand TLX.


Peter Symes Peter Symes
SMPTE Fellow
Joel E. Welch Joel E. Welch
Director of Education,