W3C home > Mailing lists > Public > public-apa@w3.org > February 2018

Re: Magnified Caption Files

From: Katie Haritos-Shea <ryladog@gmail.com>
Date: Wed, 7 Feb 2018 19:56:08 -0500
Message-ID: <CAEy-OxFs5Cr5+qCrmDTwfawCTmKKUDUfQCCXL_P1YUeyhBKKsw@mail.gmail.com>
To: John Foliot <john.foliot@deque.com>
Cc: W3C WAI Accessible Platform Architectures <public-apa@w3.org>, public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
Look at the US FCC requirements in CVAA (and possibly other Rules) for the
options necessary for captions that allows users to customize captions via
color, contrast and size.

On Feb 7, 2018 3:47 PM, "John Foliot" <john.foliot@deque.com> wrote:

> (copying the WCAG Low Vision TF)
>
> All,
>
> As you are possibly aware, we are currently closing off some old comments
> with the VTT Working Group (with spill-over to the TTML / IMSC Working
> Group) around the ability to enlarge caption text to support Low Vision
> users.
>
> Sylvia Pfeiffer responded with the following:
>
> If I understand correctly, you'd like me to add authoring guidance around
> magnification and its potential impact.
>
> Could it be done with a single paragraph such as:
> *"Authors of WebVTT caption and subtitle files are encouraged to test the
> rendering of their files using Assistive Technology. Specifically, the use
> of magnification tools by low-vision users may require editing their files
> to allow for sufficient space within cue lines and cue line heights. It is
> recommended to allow for a 200% magnification without clipping."*
>
> My personal opinion is that this is effectively what we seek (Ref: WCAG SC
> 1.4.4 Resize Text), but before I respond more formally to the GitHub issue (
> https://github.com/w3c/webvtt/issues/426) I'd welcome some feedback.
>
> LVTF, does this sound right? LV members, have you encountered something
> like this previously? (the ability to enlarge caption files independent of
> the video?)
>
> APA - are we comfortable with Sylvia's proposal? Would something like this
> also meet our needs with the TTML / IMSC group?
>
> Given that the VTT WG are keen on disposing with all comments, I'd like to
> try and resolve this one fairly quickly.
>
> Thoughts?
>
> JF
> --
> John Foliot
> Principal Accessibility Strategist
> Deque Systems Inc.
> john.foliot@deque.com
>
> Advancing the mission of digital accessibility and inclusion
>
Received on Thursday, 8 February 2018 00:56:34 UTC

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