RE: Timed Text Authoring Format - Distribution Format Exchange Pr ofile (DFXP) - Background Box modes

Glen,

I have some problems with the current support for background colour in DXFP.
The attached files indicate three common modes of using background colours.

Given the current attributes tts:displayAlign and tts:showBackground I
cannot see a way to trivially implement these effects in DXFP without
creating a large number of regions.

Can consideration be given to enhancing the  tts:showBackground attribute to
support the following attribute values?

content - The background attributes are only applied to the part of the
region that has content. I.e. there is only a background behind characters
of displayed text but not behind white-space characters (e.g. line 21 boxed
captions with transparent space).

content-space - The background attributes are only applied to the part of
the region that has content and also to white-space within the content. I.e.
there is background behind characters of displayed text and behind
white-space characters. If no white-space character exists at the end of
each line, the background is extended to cover the area of a single space
character at the end of each line. (UK boxed style)

active-line - The background attributes are applied to the lines of the
region that have content. The background extends the full width of the
**region** for any line that has content within the region.

active-stripe - The background attributes are applied to the lines of the
region that have content. The background extends the full width of the
display.

active-bounds - The background attributes are applied to the bounding box of
all content within the region, providing the region has some content. 

active-region - The background attributes are applied to the entire region
providing the region has some content. 

stripe - The background attributes are applied to the entire region
regardless of if the region has some content.. The background extends the
full display width.

region - The background attributes are applied to the entire region
regardless of if the region has some content. (E.g. this might be used for
censorship).

regards

John Birch
Senior Software Engineer,
Screen Subtitling Systems Limited,
The Old Rectory, Claydon Church Lane,
Claydon, Ipswich, Suffolk.
IP6 OEQ
 
Tel: +44 1473 831700
Fax:+44 1473 830078
www.screen.subtitling.com 

See us at NAB Las Vegas April 18-21st Stand No. SU8956

This message is intended only for the use of the person(s) ("the Intended
Recipient") to whom it is addressed. It may contain information which is
privileged and confidential within the meaning of the applicable law.
Accordingly any dissemination, distribution, copying or other use of this
message or any of its content by any person other than the Intended
Recipient may constitute a breach of civil or criminal law and is strictly
prohibited. If you are not the Intended Recipient please destroy this email
and contact the sender as soon as possible.

In messages of non-business nature, the views and opinions expressed are the
author's own and do not necessarily reflect the views and opinions of the
Screen Subtitling Systems Limited.

Whilst all efforts are made to safeguard Inbound and Outbound emails, we
cannot guarantee that attachments are Virus-free or compatible with your
systems and do not accept any liability in respect of viruses or computer
problems experienced.


-----Original Message-----
From: Glenn A. Adams [mailto:gadams@xfsi.com]
Sent: 14 March 2005 16:51
To: public-tt@w3.org
Subject: Timed Text Authoring Format - Distribution Format Exchange
Profile (DFXP)




A new update of the Timed Text Authoring Format 1.0 - Distribution
Format Exchange Profile (DFXP), is now available at [1]:

http://www.w3.org/TR/2005/WD-ttaf1-dfxp-20050314/

The TT WG solicits your comments on this new draft as soon as possible,
as a very rapid turn-around is expected in order to publish a first Last
Call (LC) draft.

Please sent comments either to this list or, if you prefer privacy, to
me directly.

Regards,
Glenn Adams