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[ttml2] TTML2 comments on roll-up and paint-on captions

From: tmichel07 via GitHub <sysbot+gh@w3.org>
Date: Mon, 02 Oct 2017 09:54:28 +0000
To: public-tt@w3.org
Message-ID: <issues.opened-262034245-1506938054-sysbot+gh@w3.org>
tmichel07 has just created a new issue for https://github.com/w3c/ttml2:

== TTML2 comments on roll-up and paint-on captions ==
comment sent by Goldstein, Glenn <glenn.goldstein@viacom.com>
Date: Wed, 12 Jul 2017 22:17:59 +0000

In my opinion, the approach taken for supporting roll-up and paint-on modes (2 important caption styles in the US) could be simplified by having explicit regions attributes, as in tts:paintmode=”rollup” or tts:paintmode=”painton”. For rollups, the scrolling style could also be designated as “smooth” or “discrete”.

This approach would simplify the conversion of 608/708 captions to TTML, and eliminate the complexity and clutter of overlapping cues and timed <span> tags.

Glenn Goldstein
SVP, Chief Technology Convergence Officer
Viacom MTS

Please view or discuss this issue at https://github.com/w3c/ttml2/issues/443 using your GitHub account
Received on Monday, 2 October 2017 09:54:17 UTC

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