[theora] NHW Project - news with Xiph.org

[Raphael Canut]

Hi Monty,

Thank you very much for your answer!

> Well, if you want to pursue a collaborative project, you need to
attract others to work on it.  Perhaps 'demo' is the wrong word... I'd
say the project needs to have a story, and a demonstration of the
technology is part of what makes the story concrete.

I have actually huge difficulties to attract other people to work on the
NHW Project... In fact there is currently just one highly skilled
researcher from IIT Bombay that gives little of his time to the study of
directional wavelet transforms and their implementation in a codec such as
NHW.Yes I will have to make a demonstation of the technology, but I am not
really skilled in making web page demos with meaningful and well-made
graphs, animations,... I fear that my demos will be rather mean and not
really attractive, and finally deserve the project.

> You should have a good idea of the complexity bounds

For example, a comparison of the totally unoptimized NHW codec with the
extremely optimized x264 intra: NHW is 3x times faster to encode and 1.2x
time faster to decode than x264.

> All these things have been done before...

Well, I was very sincere when I said that I tought they were innovations...
For my fast DWT implementation (I did it in Feb 2007), I never saw such one
in the litterature and on the Internet... it's the same for at least 2 of
the 3 entropy coding schemes... But apparently I was wrong, could you give
me reference to prior art.

>> Monty told me :"If you don't have access to web space you can use for
>> documenting and advertising the project, we can certainly offer that."

>Absolutely.

How can this materialize? Will the web space be Xiph.org entitled?

So I will try to make a demonstration of the NHW project technology to
attract interest.Do you have advice Monty, software for graphs,... (because
your demo pages are awesome!)?

Many thanks again!
Cheers,
Raphael

2017-08-30 10:16 GMT+02:00 <xiphmont at xiph.org>:

> Hi Raphael,
>
> On Fri, Aug 25, 2017 at 2:30 PM, Raphael Canut <nhwcodec at gmail.com> wrote:
>
> > I'll see what Monty will do on his side (and when he has time), but he
> also
> > told me that the NHW codec has merits but there must be an effort to
> > demonstrate them.
>
> Well, if you want to pursue a collaborative project, you need to
> attract others to work on it.  Perhaps 'demo' is the wrong word... I'd
> say the project needs to have a story, and a demonstration of the
> technology is part of what makes the story concrete.
>
> > But it is not so evident to demonstrate them, because the NHW codec
> performs
> > bad on all metrics because it modifies image to give it more neatness
> (this
> > also includes a slight denoising)... For speed, the NHW codec is written
> in
> > plain C code, there are no C optimization, no SIMD optimization, no
> > multithreading, whereas the other codecs (x265,VP9,x264,WebP,...) have
> them
> > and are highly optimized, so time/speed comparison will not be fair...
>
> Optimization at this stage of development is misplaced.  You should
> have a good idea of the complexity bounds-- this is what other
> engineers care about-- but so long as you can demonstrate that your
> approach does something unique and useful in a way that draws
> interest, that's what you need.
>
> > Then there are innovations in the NHW codec: like a new fast wavelet
> > transform, a multistage residual coding, 3 new entropy coding schemes and
> > other things like for example interesting pre- and post- processing
> based on
> > a laplacian kernel, a feedback correction,etc...
>
> All these things have been done before... how are your approaches
> unique?  What references do your versions draw from?  Build on?  One
> reason to be familiar with (and use the language) of the state of the
> art is to provide a shared context and terminology in which others can
> understand what you're doing.
>
> > Monty told me :"If you don't have access to web space you can use for
> > documenting and advertising the project, we can certainly offer that."
>
> Absolutely.
>
> > Are you interested in documentation of the innovations of the NHW codec?
> As
> > I am still very busy (but this will change), do some of you would like to
> > make these demonstrations?
> >
> > So to finish, I think it's a great deal that Xiph.org proposes!!!, if you
> > want more of this collaboration, want to help in the development,
> > documentation, demonstration of the NHW Project, do not hesitate to show
> up
> > on the forum.
> >
> > Many thanks again to Xiph!, hope this will materialize in the next
> months.
>
> Good wishes to you too!
>
> Cheers,
> Monty
>
> >
> > Cheers,
> > Raphael
> >
> > _______________________________________________
> > theora mailing list
> > theora at xiph.org
> > http://lists.xiph.org/mailman/listinfo/theora
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.xiph.org/pipermail/theora/attachments/20170830/4a9d5ded/attachment.html>