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Re: Support for advanced caption features (inc rollup)

From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
Date: Fri, 15 Feb 2013 07:47:21 +1100
Message-ID: <CAHp8n2k==QEdk8p4Mu7wH1C1G-1-b9DFp3YJqZP3fU2Ak9C0hA@mail.gmail.com>
To: Christian Vogler <christian.vogler@gallaudet.edu>
Cc: Ian Hickson <ian@hixie.ch>, public-texttracks@w3.org, Loretta Guarino Reid <lorettaguarino@google.com>
For those browsers interested in implementing a rollup captions feature and
other FCC requirements, there is now a concrete extension specification for
WebVTT:
https://dvcs.w3.org/hg/text-tracks/raw-file/default/608toVTT/region.html

Regards,
Silvia.

On Thu, Dec 13, 2012 at 9:06 AM, Christian Vogler <
christian.vogler@gallaudet.edu> wrote:

> Comments inline.
>
> On Wed, Dec 12, 2012 at 2:49 AM, Silvia Pfeiffer
> <silviapfeiffer1@gmail.com> wrote:
> >> > (2) Character color. All apparatus shall implement captioning such
> that
> >> > characters may be displayed in the 64 colors defined in CEA-708 and
> such
> >> > that users are provided with the ability to override the authored
> color
> >> > for characters and select from a palette of at least 8 colors
> including:
> >> > white, black, red, green, blue, yellow, magenta, and cyan.
> >>
> >> This we support via CSS and CSS user style sheets (the latter of which
> can
> >> be exposed as UI). It does mean that FCC-compliant WebVTT browser
> >> implementations will have to support CSS.
>
> I'd also like to point out that CSS support shouldn't be just about
> "FCC compliance."
>
> Colors and background settings have been essential in making captions
> work for people with vision problems, and there is also some variety
> as to what deaf and hard of hearing people with normal vision prefer.
> Moreover, positioning and font attributes are used for denoting such
> things as where sounds are coming from and whether someone is speaking
> off-screen. That's much more fundamental than trying to comply with a
> set of regulations. It's just good universal design practice.
>
> Christian
>
Received on Thursday, 14 February 2013 20:48:10 GMT

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