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Re: Why use time as a unit of measurement? (was: Proposal 0.0)

From: Jean-Claude Dufourd <Jean-Claude.Dufourd@enst.fr>
Date: Fri, 21 Feb 2003 11:57:27 +0100
Message-ID: <3E560617.5000900@enst.fr>
To: public-tt@w3.org

Dear Dave,

Dave Singer wrote:
> Well, that appears to be what happens, but alas, is not.  What you'd 
> like to know is "play from 0 to 10 minutes", "play from 12 to 15 
> minutes", and so on.  What you actually get is a continuous program 
> where those edits have already occurred.
> Happily, the timecodes get edited with the video and audio; that's why I 
> say that it is a stream.  If you look at the timecodes going by, you can 
> work out what edits happened.  If there is a text tag with a time-code 
> value of "13 minutes" as its trigger, that will play 12 minutes in 
> (minute 11 being missing).  If the trigger said "11 minutes" then that 
> text element will never display as that timecode was edited out.

You are describing not requirements, but a solution/implementation. The 
fact that all current broadcast implementations look the same should not 
force us to adopt the very same solution. We should go back to 
requirements, in order to be able to unify this with the needs of the PC 
world, as well as the different needs of the mobile world.

Best regards
Jean-Claude Dufourd       @======================================@
ENST, Dept COMELEC             The wing, over the big rock...
46, rue Barrault          @======================================@
75013 Paris                Tel: +33145817807    Fax: +33145804036
Received on Friday, 21 February 2003 06:03:00 UTC

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