Re: Support for advanced caption features (inc rollup)

Update on the region spec: I have just fixed two issues with the spec:

1. The spec stated percentages to be double, but only parsed integer
percentages. It now specifies them as real numbers and also throws
IndexSizeError when not within 0-100%.

2. Added a removeRegion(region) function to TextTrackRegion to close
https://www.w3.org/Bugs/Public/show_bug.cgi?id=21191

Cheers,
Silvia.

On Fri, Feb 15, 2013 at 7:47 AM, Silvia Pfeiffer
<silviapfeiffer1@gmail.com>wrote:

> 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 Friday, 8 March 2013 08:38:17 UTC