- From: Thierry MICHEL <tmichel@w3.org>
- Date: Thu, 15 Jun 2017 17:14:21 +0200
- To: takeuchi.s-js@nhk.or.jp, W3C Public TTWG <public-tt@w3.org>
Dear Shinya Takeuchi, ARIB, W3C Timed Text Liaison contact The Timed Text Working Group has reviewed the comments you sent [a] on the Wide Review Working Draft [b] of IMSC 1.0.1 published on 22 March 2017. Thank you for having taken the time to review the document and to send us comments. The Working Group's response to your comments is included below. Please review it carefully and let us know by email at public-tt@w3.org?subject=%5Bimsc%5D if you agree with it or not before 30 June 2017 as we plan a Candidate Recommendation soon. In case of disagreement, you are requested to provide a specific solution for or a path to a consensus with the Working Group. If such a consensus cannot be achieved, you will be given the opportunity to raise a formal objection which will then be reviewed by the Director during the transition of this document to the next stage in the W3C Recommendation Track. Sincerely, For the Timed Text Working Group, Thierry Michel W3C Staff Contact a. https://lists.w3.org/Archives/Public/public-tt/2017May/0018.html b. https://www.w3.org/TR/2017/WD-ttml-imsc1.0.1-20170322/ ================================================================== ---------------------------------------- Working Group's response to your comments ---------------------------------------- A- Your comment on activeArea attribute The WG clarified that specific behavior of the system is left intentionally undefined (see latest Editor's Draft at [1]): """ Under normal circumstances, the entirety of the root container is presented. However, under special circumstances, such as when the related video object is cropped, a system can, for instance, use the ittp:activeArea parameter to avoid cropping areas of the root container that are intended to be visible to the viewer. The specific behavior of the system is however left undefined intentionally: the system can select a presentation mode appropriate to the display shape, user preferences, etc. The ittp:activeArea is analogous to the Active Format Description (AFD) metadata commonly used in broadcast applications. """ A more detailed discussion is available at [2] and [3]. [1] http://w3c.github.io/imsc/imsc1/spec/ttml-ww-profiles.html [2] https://github.com/w3c/imsc/issues/227 [3] https://github.com/w3c/imsc/issues/191 B- Your comment on fillLineGap attribute The WG has revised Figure 1 (see [1]) to better illustrate the line gap filling algorithm, which "extends the background of each inline area generated by descendant <span>s of the <p> element to the before-edge and after-edge of its containing line area." See also the discussion at [2]. [1] http://w3c.github.io/imsc/imsc1/spec/ttml-ww-profiles.html [2] https://github.com/w3c/imsc/issues/228 ==================================================================
Received on Thursday, 15 June 2017 15:14:40 UTC