W3C home > Mailing lists > Public > public-tt@w3.org > February 2003

Re: RE: Proposal 0.0

From: geoff freed <geoff_freed@wgbh.org>
Date: Thu, 06 Feb 2003 09:10:58 -0500
To: Johnb@screen.subtitling.com, public-tt@w3.org
Message-Id: <FMJ2XKIFGCQLGDFEB2Z1W1ZC9412U.3e426cf2@F17204029499668>

2/6/2003 6:33:43 AM, Johnb@screen.subtitling.com wrote:

>TCIn 01:03:28:18	TCOut 01:03:30:00 	"Jack, je tenais à vous
>prévenir."
>TCIn 01:03:32:05 	TCOut 01:03:35:10 	"Elle va mal. Son état
>s&apos;est beaucoup aggravé.
>TCIn 01:03:35:24 	TCOut 01:03:38:04	"Je lui ai donné des
>calmants."

Between subtitles two and three, above, there's a pause of 14 frames.  For such a short pause, I don't see a need to require an out time to erase the 
display
.  Instead, simply let the third subtitle replace the second.  That's how many captioning agencies do it today, and it's a good model.  Captions that are
 sequenced with tiny pauses between them cause the viewer to blink, and that's annoying.  If you need to pause between captions-- e.g., if there's 
nobody speaking-- *then* erase the display with an out time.  Otherwise it would be best to simply let the captions appear smoothly 
one after the other with no pause.

Geoff Freed
WGBH/NCAM


>
>Charles Wiltgen wrote:
><Snipped SMIL example>
>
>> (If people have scenarios that they'd like me to whip up solutions for
>> using this timing model, please let me know!)
>
>OK, I'll bite:
>
>....
>....
>
>Now an advert break occurs at 01:03:30:00 and lasts for five minutes. This
>must be catered for. I.e. the TT must be able to refer to absolute external
>timestamps (not 1 sec per sec 'real times'). Simlarly off times need to be
>expressed wrt the program material, so even if specified as durations they
>would be re-calculated by adding the duration to the TCIn value.
>
>regards 
>
>John Birch
>
>The views and opinions expressed are the author's own and do not necessarily
>reflect the views and opinions of Screen Subtitling Systems Limited.
>
>
Received on Thursday, 6 February 2003 09:14:09 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Monday, 2 November 2009 22:41:26 GMT