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Re: Review of section 8

From: RaphaŽl Troncy <Raphael.Troncy@cwi.nl>
Date: Tue, 14 Apr 2009 15:57:14 +0200
Message-ID: <49E4963A.5020201@cwi.nl>
To: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
CC: Media Fragment <public-media-fragment@w3.org>, "'Davy Van Deursen'" <davy.vandeursen@ugent.be>, Erik Mannens <erik.mannens@ugent.be>
Dear Silvia,

> Here goes review of section 8....

[Erik has addressed most of these comments this morning.]

I do have some more questions for Davy :-) ... see below.

> Section 8.1
> * (minor text change:) first paragraph: replace "There exists already"
> with "There exist already"

I have overwritten this, as my grammar dictionary told me: "There existS 
already ..." + singular

> Section 8.2
> * if we cannot provide a syntax example for Metacafe, Dailymotion, or
> Microsoft IIS, we should leave them out, because they do not
> contribute anything

Agree. I have slightly reformatted this part and largely reformat the 
rest of the Section 8, I hope it is now more readable.

> Section MPEG-21
> * can we have a reference to a Web page that explains this stuff here?
> * what are the "iloc" and "tkhd" boxes?


> * in the "mask()" paragraph, I do not understand what is meant by a
> binary (1-bit deep) mask - can you explain? This also applies to
> section which I do not understand either (and the sentence
> in the <eg> example is cut off).


> Section SMIL
> * fourth paragraph claims that the coords attribute is
> compatible with HTML - might be worth stating CSS as well
> * last sentence should read "Yet, no such implementations
> are known." to make the sentence neutral


> Section MPEG-7
> * should add after the example what it actually describes.
> Something like: "This MPEG-7 example describes a spatial mask called
> "speaker" which is given by the coordinates (40, 300), (105,210),
> (???), (320,240)." (and can somebody please clarify what that middle
> bit is?)

"???" meant to be "..." for reflecting the complete definition of the 

> * should also clarify what the <box> definition is - what do
> those numbers actually mean?

I think the coordinates written as float.

> * should add how to address such a thing - would it be
> http://example.com/fragf2f.mp7#id=speaker ?


> Section TimedText
> * this is very bare and does not show any hyperlinking at all; unless
> we have an idea how hyperlinking works in TimedText we should either
> drop this or make an editorial note that we require clarification on
> this

I guess Thierry could provide that.

> Section HTML5
> * it might be possible to write something like this:
>   "Currently, HTML5 relies on the abilities of the used media format
> for providing media fragment addressing. Here is an example using Ogg:
> (enter Ogg examples). In future, HTML5 is planning to adopt the
> fragment URI specifications of this document for providing fragment
> addressing. Input from the WHAT and HTML working groups is requested."

I have added this note.

> Section TV-Anytime
> * In contrast to all other section here, the TV-Anytime
> section does not include examples of how to use a
> temporal/spatial/named document example and URI address it. Instead,
> this section contains extracts from the specification of the
> TV-Anytime language. This section is basically unreadable and unusable
> because of that. I found it hard to wade my way through from
> tva:TimeBaseReference, tva:TVAMediaTimeType, and
> tva:fragmentIdentification to the specification of
> TimeBaseReferenceType through to mpeg7:mediaTimePointType and
> mpeg7:MediaRelIncrTimePointType and their specifications. Can we
> please rather have a TV-Anytime example document with some actual time
> points in them? Or can we just ditch this whole paragraph an say that
> TV-Anytime uses the MPEG-7 specification to define media fragments?

Agree, Erik, what do you think?


RaphaŽl Troncy
CWI (Centre for Mathematics and Computer Science),
Science Park 123, 1098 XG Amsterdam, The Netherlands
e-mail: raphael.troncy@cwi.nl & raphael.troncy@gmail.com
Tel: +31 (0)20 - 592 4093
Fax: +31 (0)20 - 592 4312
Web: http://www.cwi.nl/~troncy/
Received on Tuesday, 14 April 2009 13:58:05 UTC

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