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

From: Andreas Tai <tai@irt.de>
Date: Mon, 28 May 2012 18:39:49 +0200
Message-ID: <4FC3AA55.4060908@irt.de>
To: public-tt@w3.org, Glenn Adams <glenn@skynav.com>
That´s exactly the point. I would support to have a separate bullet 
point for smpte continuous.

Am 28.05.2012 16:29, schrieb Glenn Adams:
>
> On Mon, May 28, 2012 at 7:35 AM, Andreas Tai <tai@irt.de 
> <mailto:tai@irt.de>> wrote:
>
>     Thanks, Glenn for clarification. That´s the same how I understand it.
>
>     I would therefore propose the following change in chapter 10.4
>     Time Intervals:
>
>     => 4th bullet point
>
>     Now:
>     "If the governing time mode is media or smpte with mode
>     continuous, then time expressions must be interpreted as
>     equivalent to offset based timing in [SMIL 2.1], namely, as
>     offsets from an implicit syncbase."
>
>     Change Proposal:
>     "If the governing time mode is media, then time expressions must
>     be interpreted as equivalent to offset based timing in [SMIL 2.1],
>     namely, as offsets from an implicit syncbase."
>
>
> The current text is correct since for smpte time base with continuous 
> marker mode, time expressions are in fact equivalent to offset based 
> timing, where the start of the implicit syncbase for tt:tt is 
> 00:00:00.0. However, given the following bullet in 10.4 (about smpte 
> discontinuous begin equivalent to marker values), I can see how one 
> may   read 10.4 as saying that smpte continuous mode does not entail 
> marker values. The intention is that smpte continuous be marker values 
> that are equivalent to offset based timing (due to satisfaction of 
> continuity and monotonicity). Perhaps breaking out smpte continuous 
> into its own bullet would be the way to better express this intention.
>
>
>
>


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Received on Monday, 28 May 2012 17:07:58 UTC

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