[X3D-Public] DASH-X3D new profile - Interoper abilitypoint

Fri May 9 18:26:02 PDT 2014

x3z seems to be interesting, we might include it in future implementations,
or as additional mime-type in the DASH interoperability point. Are there
any players supporting this format? or the developer has to temporary
download the zip, uncompress and then give the sources to the player?

In our example we focused more on the delivery protocols, and less on
chunking methods, for the partial streaming tests we used serial and area
short chunking mechanisms, generating autonomous chunks of indexes and
indexedFaceSet.

Regarding the DASH Interoperability point:  To begin with, we will consider
an existing repository with existing versions of a model in a variety of
qualities. (the file format can be described as a mime time of the
representation, and the chunking mechanism should inform the client on how
to dynamically compose the final model)

The client will decide according to the available resources which chunk
will be requested, on a second pass the delivered (low quality) models will
be replaced with higher-quality ones (or a transformation - morphing
algorithm at this point would be interesting, sacrificing hardware
resources to minimize the network bandwidth demand) . The replacing process
has to be transparent to the user to maintain good Quality of Experience
(e.g. smooth interaction). In a future work we might consider the
significance of each model to prioritize the most significant.

On Fri, May 9, 2014 at 10:13 PM, doug sanden <highaspirations at hotmail.com>wrote:

> Kostas,
> > http://www.medialab.teicrete.gr/index.php/minipages
> Very interesting - I'll take a closer look.
>
> Q. what about the .x3z scene zipping
> www.cloudvr.net
> which is like googleEarth .kmz - a doc.x3d in the root of a .zip file, and
> /images subfolder - or other docx style resource bundling - does that fit
> with the manifest and chunking methods you use, or does your method
> replace/obsolete these bundling methods?
> -Doug
>
> >
> > Dear Sanden,
> >
> > The MPEG-DASH approach we are currently working on (for my master's
> > dissertation) will present 3d models in several resolution instances
> > and inspite of the BASEurl, the MPD will provide proper information for
> > dynamic adaptation mechanisms to 3D players (browser-based or not). The
> > content will be delivered and rendered client-side, as X3DOM originally
> > works right now (and any other plug-in based player).
> >
> > ...
> > The approach with html5 canvas and gesture messages to a remote
> > renderer having sessions, is one of the implementations we performed
> > using Java X3D player, during our research in a project we are working
> > in collaboration with other departments, (i-promotion) (greek content
> > description : http://www.ipromotion.gr/) . There is a lot of
> > optimization needed for such an application to be published, the delay
> > is almost unacceptable.
> >
> > There is a procedural streaming approach we tested and published in a
> > minipage (during model loading you can navigate in the world).
> > Utilizing Websockets, simple http requests and a batch request
> > http://www.medialab.teicrete.gr/minipages/x3domstream/
> >
> > furthermore, if you are interested some of our research demos are here:
> > http://www.medialab.teicrete.gr/index.php/minipages
> >
> >
> >
> > On Fri, May 9, 2014 at 8:57 PM, doug sanden
> > <highaspirations at hotmail.com<mailto:highaspirations at hotmail.com>>
> > wrote:
> > Kostas,
> > Not sure how you use DASH with x3d. What does it look like?
> > -Doug
> > more..
> > I had an idea -and may get to it in the next year- for something I call
> > 'Server-Side Rendering' or SSR for short. If you've got beautiful Crete
> > 3D tourist scenery -in X3D format- and want web surfers to be able to
> > go around in 3D -but without heavy-duty x3dom .js, and without plugins-
> > then the idea is that the client swipes/drags a 2D Html5 canvas which
> > causes a 3D grid of construction lines to be redrawn as if navigating
> > through the grid in 3D. When they lift their finger/mouse button at the
> > end of the swipe/drag, the cumulative navigation is sent to the server,
> > which moves the avatar in the scene and renders the snapshot from the
> > new viewpoint pose, and ajaxes the view back to the client.
> > This would need an x3d renderer capable of holding session state -if
> > the scene state is different for each user- or else passing back the
> > cumulative navigation in a cookie or restful url after correcting for
> > collision and gravity to the cumulative navigation.
> > Perhaps DASH-X3D is something like that, except the client has no
> > control over the path, and instead of ajaxing snapshots a movie-like
> > MPEG stream is sent.
> >
> >
> > ________________________________
> >> From: kapekost at gmail.com<mailto:kapekost at gmail.com>
> >> Date: Fri, 9 May 2014 20:16:13 +0300
> >> To: dash at lists.uni-klu.ac.at<mailto:dash at lists.uni-klu.ac.at>
> >> CC:
> > x3dom-users at lists.sourceforge.net<mailto:
> x3dom-users at lists.sourceforge.net>;
> > x3d at web3d.org<mailto:x3d at web3d.org>;
> >> athanasios.malamos at gmail.com<mailto:athanasios.malamos at gmail.com>;
> > x3D-public at web3d.org<mailto:x3D-public at web3d.org>;
> >>
> > x3dom-developers at lists.sourceforge.net<mailto:
> x3dom-developers at lists.sourceforge.net>
> >> Subject: [X3D-Public] DASH-X3D new profile - Interoper abilitypoint
> >>
> >> to whom it may concern,
> >>
> >> In multimedia content laboratory of TEI of Crete, we are working on a
> >> new profile/interoperability point, for 3D scenes delivery (X3D).
> >> My first approach is based on ISO/IEC 23009-1.
> >> I would kindly ask if anyone else is currently working on 3D scene
> >> delivery for MPEG-DASH to contact me. Additionally, I would like more
> >> information on how to describe a new interoperability point (the
> >> documents which should be delivered for review according to
> >> http://dashif.org/identifiers/how-to-register/ ).
> >> Best Regards,
> >>
> >> --
> >> Kostas
> >>  
> >> Kapetanakis
> >> 
> >> 
> >> Project coordinator - R&D
> >> McLab - Informatics Engineering
> >> 
> >> TEI of Crete
> >>
> > www.medialab.teicrete.gr<http://www.medialab.teicrete.gr><
> http://www.medialab.teicrete.gr>
> >>
> >> _______________________________________________ X3D-Public mailing list
> >> X3D-Public at web3d.org<mailto:X3D-Public at web3d.org>
> >> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
> >
> > _______________________________________________
> > X3D-Public mailing list
> > X3D-Public at web3d.org<mailto:X3D-Public at web3d.org>
> > http://web3d.org/mailman/listinfo/x3d-public_web3d.org
> >
> >
> >
> > --
> > Kostas
> > Kapetanakis
>

-- 
*Kostas Kapetanakis*

Project coordinator - R&D
McLab - Media Content Laboratory
Informatics Engineering

TEI of Crete
www.medialab.teicrete.gr
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20140510/f83888a2/attachment-0001.html>