W3C home > Mailing lists > Public > public-texttracks@w3.org > February 2013

RE: Support for advanced caption features (inc rollup)

From: Goldstein, Glenn <glenn.goldstein@viacom.com>
Date: Thu, 14 Feb 2013 21:50:07 +0000
To: Silvia Pfeiffer <silviapfeiffer1@gmail.com>, Christian Vogler <christian.vogler@gallaudet.edu>
CC: Ian Hickson <ian@hixie.ch>, "public-texttracks@w3.org" <public-texttracks@w3.org>, Loretta Guarino Reid <lorettaguarino@google.com>
Message-ID: <75386C677798CF40BE98B873913D005220CFE9@ABFABNJ04A.mtvn.ad.viacom.com>
this is good news. rollup captions are very much a reality for the TV industry. it is my hope that we see this fully implemented in all VTT scenarios (VTT embedded in HLS playlists AND as video tag text tracks).


Glenn Goldstein | Vice President, Media Technology Strategy | VIACOM
glenng@mtvi.com | 212-846-3210 | 1515 Broadway, New York NY 10036

From: Silvia Pfeiffer [mailto:silviapfeiffer1@gmail.com]
Sent: Thursday, February 14, 2013 3:47 PM
To: Christian Vogler
Cc: Ian Hickson; public-texttracks@w3.org; Loretta Guarino Reid
Subject: Re: Support for advanced caption features (inc rollup)

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


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

On Wed, Dec 12, 2012 at 2:49 AM, Silvia Pfeiffer
<silviapfeiffer1@gmail.com<mailto: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.

Received on Thursday, 14 February 2013 21:50:42 UTC

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