EBU Tech 3380

EBU-TT-D Subtitling Distribution Format

This specifies an XML based format for the distribution of subtitles over IP-based networks. It includes two additional features defined in W3C IMSC v1.0.1 and improves compatibility with other profiles of TTML by clarifying the required processor behaviour in the presence of unrecognised attributes.

Open file (pdf, 1 MB)

Version 1.0.1d of EBU Tech 3380 is a draft of what is to become v1.0.1 of EBU Tech 3380. The version number has been chosen to align with the W3C IMSC v1.0.1 Recommendation. As that Recommendation was not final yet in October 2017, the EBU released Tech 3380 v1.0.1 as a draft (suffix d). It is expected EBU Tech 3380 v1.0.1 will only differ from v.1.0.1d in the following:

  • Updated reference to the final W3C IMSC v1.0.1 Recommendation.
  • Addition in EBU Tech 3380 of a new URI for use in the ebuttm:conformsToStandard element to identify conformance with v1.0.1.

The EBU intends to promote EBU Tech 3380 from v1.0.1d to v1.0.1 as soon as the final W3C IMSC v1.0.1 Recommendation is published.

A changelog with pointers to the previous version 1.0 is available here.

More information on the EBU family of specifications is available here.


The following translations of this document are available. Please note the translations may not be based on the latest version; see the year mentioned in brackets. These translations are courtesy of the translaters and hosted by the EBU 'as is'. The official and definitive version is the EBU English version.

Russian version of EBU Tech 3380 [2014] - Special thanks to EBU Member RTR.