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RE: TT and subtitling

From: John Glauert <J.Glauert@sys.uea.ac.uk>
Date: Fri, 7 Feb 2003 12:10:27 +0000
Message-Id: <p05111b02ba694c6dfce3@[]>
To: <public-tt@w3.org>

I doubt if I will be adding much to the debate, which seems to be converging:

* Some semantics should be built in.
   - Language
   - Is it a representation of the spoken audio?
     If so, "compression level" from verbatim down to short precis.
     Also, reading level. (Not necessarily the same thing.)
   - Or is it a representation of "stage directions" and other sounds?

* But the format needs to be extensible.

* Where there is a bitmap of text, there should also be (at least the 
option of) a plain text equivalent.

Compression level might be handled by marking sections with a 
priority so that people could select the rate at which 
captions/subtitles are thrown at them. I would like something like 
this to be incorporated in the standard at a high level so we could 
use it with signing (see below). Equally, stage directions could be 
tagged as such in a single stream.

I would like to add a plea to consider non-text! I realise this is 
strange given the nature of the group, but the following (at least) 
fit the pattern of captions/subtitles:

* Audio description.
   - Could be transmitted as audio stream.
   - Could be transmitted as text or phoneme stream directed to a 
speech synthesiser.

* Signing.
   - Could be transmitted as video stream.
   - Could be transmitted as notation stream for rendering in receiver.

Such content can be simply represented by XML inserts into the TT 
format, with the timing and presentation information conforming to 
the agreed TT standards. (Lets use a small number of SMIL modules.) 
The language is (for the signing) ASL, BSL, or whatever.

Prof. John Glauert                                     Tel: +44 1603 592603
eSIGN Project at UEA                                   Fax: +44 1603 593345
School of Information Systems                  Home Office: +44 1603 462679
UEA Norwich,  NR4 7TJ, UK
mailto:J.Glauert@uea.ac.uk                http://www.visicast.sys.uea.ac.uk
Secretary: Rachel Buckenham  mailto:rb@sys.uea.ac.uk   Tel: +44 1603 593528
Received on Friday, 7 February 2003 07:30:34 UTC

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