ISSUE-288: Rules for splitting and accumulating documents

Document Segmentation

Rules for splitting and accumulating documents

State:
OPEN
Product:
TTML2
Raised by:
Nigel Megitt
Opened on:
2013-10-23
Description:
EBU Liaison has requested: "Document segmentation: rules for breaking up a document into arbitrary smaller chunks or samples each with a specified time range, likely to be used for streaming e.g. in MPEG Dash or similar carriage mechanisms; for assembling a series of smaller documents into larger ones, e.g. for archive purposes; for combining these activities to create new samples with different temporal extents."

An EBU document describing such rules has been circulated in draft form but is not openly available. For those with access to the EBU XMLSubtitles workspace it can be found at http://workspace.ebu.ch/download/attachments/11998865/mim-xmlsubs0133r05.EBU-TT_Segmentation.pdf or can be sent directly to those who request it - contact Nigel Megitt.

One option presented by the proposal is that documents may contain content that extends beyond its temporal extent without extending the document's overall temporal extent. This simplifies the splitting and accumulating tasks.
Related Actions Items:
Related emails:
  1. Re: ISSUE-358 (Sequence support): Add identifier support for related ordered sequences of documents [TTML2] (from glenn@skynav.com on 2014-12-11)
  2. Re: ISSUE-358 (Sequence support): Add identifier support for related ordered sequences of documents [TTML2] (from nigel.megitt@bbc.co.uk on 2014-12-11)
  3. Re: ISSUE-358 (Sequence support): Add identifier support for related ordered sequences of documents [TTML2] (from glenn@skynav.com on 2014-12-10)
  4. ISSUE-358 (Sequence support): Add identifier support for related ordered sequences of documents [TTML2] (from sysbot+tracker@w3.org on 2014-12-10)
  5. Re: [ttml2] embedded content, background image styling, other edits (from glenn@skynav.com on 2014-11-26)
  6. RE: [ttml2] embedded content, background image styling, other edits (from John.Birch@screensystems.tv on 2014-11-26)
  7. Re: [ttml2] embedded content, background image styling, other edits (from nigel.megitt@bbc.co.uk on 2014-11-26)
  8. Re: [ttml2] embedded content, background image styling, other edits (from John.Birch@screensystems.tv on 2014-11-26)
  9. Re: [ttml2] embedded content, background image styling, other edits (from glenn@skynav.com on 2014-11-26)
  10. {minutes} TTWG Meeting 14/8/2014 (from nigel.megitt@bbc.co.uk on 2014-08-14)
  11. {agenda} TTWG Meeting 14/8/2014 (from nigel.megitt@bbc.co.uk on 2014-08-13)
  12. Re: {minutes} TTWG Meeting 7/8/2014 (from nigel.megitt@bbc.co.uk on 2014-08-08)
  13. Re: {minutes} TTWG Meeting 7/8/2014 (from glenn@skynav.com on 2014-08-07)
  14. {minutes} TTWG Meeting 7/8/2014 (from nigel.megitt@bbc.co.uk on 2014-08-07)
  15. TTWG Agenda for 9/1/14 (from nigel.megitt@bbc.co.uk on 2014-01-08)
  16. RE: EBU Segmentation document (from mdolan@newtbt.com on 2013-12-19)
  17. TTWG Agenda for 12/12/13 (from nigel.megitt@bbc.co.uk on 2013-12-11)
  18. Re: TTWG Agenda for 5/12/13 (from nigel.megitt@bbc.co.uk on 2013-12-11)
  19. Re: TTWG Agenda for 5/12/13 (from glenn@skynav.com on 2013-12-11)
  20. RE: TTWG Agenda for 5/12/13 (from mdolan@newtbt.com on 2013-12-10)
  21. Re: EBU Segmentation document (from tai@irt.de on 2013-12-09)
  22. RE: EBU Segmentation document (from John.Birch@screensystems.tv on 2013-12-09)
  23. RE: EBU Segmentation document (from mdolan@newtbt.com on 2013-12-05)
  24. TTWG Minutes for 5/12/13 (from nigel.megitt@bbc.co.uk on 2013-12-05)
  25. TTWG Agenda for 5/12/13 (from nigel.megitt@bbc.co.uk on 2013-12-04)
  26. Re: EBU Segmentation document (from nigel.megitt@bbc.co.uk on 2013-11-21)
  27. RE: EBU Segmentation document (from John.Birch@screensystems.tv on 2013-11-21)
  28. {minutes} 21/11/13 TTWG Meeting (from nigel.megitt@bbc.co.uk on 2013-11-21)
  29. TTML Minutes for 11/11/13 (from nigel.megitt@bbc.co.uk on 2013-11-21)
  30. RE: EBU Segmentation document (from mdolan@newtbt.com on 2013-11-21)
  31. Re: TTML Agenda for 21/11/13 (from cyril.concolato@telecom-paristech.fr on 2013-11-21)
  32. Re: TTML Agenda for 21/11/13 (from glenn@skynav.com on 2013-11-21)
  33. Re: TTML Agenda for 21/11/13 (from tmichel@w3.org on 2013-11-21)
  34. TTML Agenda for 21/11/13 (from nigel.megitt@bbc.co.uk on 2013-11-20)
  35. EBU Segmentation document (from nigel.megitt@bbc.co.uk on 2013-11-11)
  36. {minutes} TTML Meeting of 24/10/13 (from glenn@skynav.com on 2013-10-24)
  37. RE: TTML Agenda for 24/10/13 (from mdolan@newtbt.com on 2013-10-23)
  38. TTML Agenda for 24/10/13 (from nigel.megitt@bbc.co.uk on 2013-10-23)
  39. ISSUE-288 (Document Segmentation): Rules for splitting and accumulating documents [TTML2] (from sysbot+tracker@w3.org on 2013-10-23)

Related notes:

Nigel: P1

Philippe Le Hégaret, 24 Oct 2013, 15:53:54

Owner is Andreas + Nigel (i.e. EBU)

Nigel Megitt, 28 Oct 2013, 11:58:54

Document can be found on email at http://lists.w3.org/Archives/Public/public-tt/2013Nov/0026.html

Nigel Megitt, 11 Nov 2013, 14:18:33

I've updated Change Proposal 25 [1], which relates to this issue, with rules and an algorithm for combining documents with the same group identifier (a new attribute on tt:tt).

[1] https://www.w3.org/wiki/TTML/changeProposal025

Nigel Megitt, 7 Aug 2014, 15:04:17

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David Singer <singer@apple.com>, Nigel Megitt <nigel.megitt@bbc.co.uk>, Chairs, Thierry Michel <tmichel@w3.org>, Philippe Le Hégaret <plh@w3.org>, Staff Contacts
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