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Re: ISSUE-151 Clarify syncbase in SMPTE continuous mode - Draft Change Applied

From: Andreas Tai <tai@irt.de>
Date: Sun, 27 May 2012 14:10:35 +0200
Message-ID: <4FC219BB.4020108@irt.de>
To: Glenn Adams <glenn@skynav.com>
CC: public-tt <public-tt@w3.org>
The edit of ttp:markerMode with the value "continuous" implies that all 
time expression in markerMode "continuous" are "labeled synchronization 
events (markers)".

I have two questions with the reference to the last example on the 
discussion page on issue 151 
(http://www.w3.org/wiki/TTML/Issue151Discussion):

<p region='r' begin='00:00:27:00' end='00:00:38:00'>
<span begin='00:00:28:00'>A</span>
<span begin='00:00:29:00'>B</span>
<span begin='00:00:30:00'>C</span>
</p>

Assumption: timebase = "smpte" + markerMode = "continuous"

1) Are the time expressions of the span elements valid?

2) Is the begin of the first span element timed when some external 
synchronization context emits the event "00:00:28:00" or is it timed 28s 
after the begin of the parent p (so at "00:00:55:00")?

Thanks and best regards,

Andreas

Am 26.04.2012 06:31, schrieb Glenn Adams:
>
> I've taken a stab at addressing ISSUE-151 [1] (ACTION-51 [2]). See 
> updated ED [3] and changeset [4].
>
> The relevant changes are under Sections 6.2.11 (ttp:timeBase) and 
> 6.2.6 (ttp:markerMode).
>
> [1] http://www.w3.org/AudioVideo/TT/tracker/issues/151
> [2] http://www.w3.org/AudioVideo/TT/tracker/actions/51
> [3] http://dvcs.w3.org/hg/ttml/raw-file/tip/ttml10/spec/ttaf1-dfxp.html
> [4] http://dvcs.w3.org/hg/ttml/rev/2bde2e2c5507


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Received on Sunday, 27 May 2012 12:22:07 UTC

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