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[IMSC 1] test suite review

From: Nigel Megitt <nigel.megitt@bbc.co.uk>
Date: Wed, 11 Mar 2015 16:33:51 +0000
To: Public TTWG List <public-tt@w3.org>
Message-ID: <D1261EE9.1CA43%nigel.megitt@bbc.co.uk>
All,

Apologies for only being able to schedule this work so close to the
deadline, but I've at last managed to do a pass through IMSC 1 looking for
normative statements that affect processors, and reconcile this against
the test suite that we have, as discussed in telcons recently.

I think I've found some normative statements on processor behaviour for
which tests are absent or incomplete. I attach a table showing this
analysis. Just a reminder: the statements or features that need to be
tested are those that are new to IMSC 1 relative to TTML1SE.

In the case of the requirements from ยง6.6 concerning ttp:frameRate and
ttp:frameRateMultiplier, I am unsure what the test should be because it is
not clear exactly what the spec is requiring the processor to do: is it
saying that the related video object must be advanced at the stated
ttp:frameRate regardless of how it was encoded or decoded or is it saying
that if they do not match already then the processor should display
nothing, for example?

Kind regards,

Nigel

-- 
Nigel Megitt
Lead Technologist, BBC Technology
Telephone: +44 (0)3030807996
BC4 A3 Broadcast Centre, Media Village, 201 Wood Lane, London W12 7TP



Received on Wednesday, 11 March 2015 16:34:22 UTC

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