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Old 9th January 2006, 16:33   #1  |  Link
3dsnar
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NEW CODEC! 128 kbps and less for 5.1 surround encoding for MPEG4 (Xvid/Divx) movies

Dear All,

I am happy to annonce that we have
just finished a huge 5.1 surround sound
compression research project.


Software tools for encoding movies
with full 5.1 surround,
and
for real time decoding are available now.

www.aud-x.com
THE TECHNOLOGY IS FREE

I hope that you will
find it useful.
All comments are welcome :-)

Peace
3d

Last edited by 3dsnar; 9th January 2006 at 16:37.
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Old 9th January 2006, 17:34   #2  |  Link
Nic
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Perhaps you could post a little more about how the codec works?

You mention MP3 compatibility (on the website). Could you give us more details on how this works?
(i.e. is this a Multichannel MP3 implementation?)

You also state that the projects uses code from AC3Enc and LAME. You realise that these are LGPL projects and can only be linked to in a certain way? The rules are quite strict...(such as releasing object files of your project when not linking dynamically to the libraries as in Aud-Xs case, etc)

Thanks for any insight,
-Nic

Last edited by Nic; 9th January 2006 at 17:38.
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Old 9th January 2006, 17:51   #3  |  Link
3dsnar
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> Hi, thanx for interest.

[QUOTE=Nic]Perhaps you could post a little more about how the codec works?

You mention MP3 compatibility (on the website). Could you give us more
details on how this works?
(i.e. is this a Multichannel MP3 implementation?)
> This is not not a Multichannel MP3 implementation.
> Some details related to the codec are available on the web page
> (whitepaper, etc).
> In general some additional information is stored in the mp3 stream,
> however the information is not related to mp3 encoding.
> It is in this way similar to mp3surround, where the multichannel panorama
> is reconstructed based on merged to stereo (or mono) multichannel stream
> and some phase information on how to reconstruct the full 5.1 sound during
> the decoding process are placed between mp3 frames. Frauenhofer stores energy related spectral
> information, which does not allow phase to be properly reconstructed.
> And phase is very important in surround perception... Thus our side
> stream (stored "between" mp3 frames) contains energy + phase info.

You also state that the projects uses code from AC3Enc and LAME. You realise that these are LGPL projects and can only be linked to in a certain way? The rules are quite strict...(such as releasing object files of your project when not linking dynamically to the libraries as in Aud-Xs case, etc)
> I must talk to the software guy who did the implementation.
> But thank you for suggestion! I will make sure that everything is legal.

Last edited by 3dsnar; 9th January 2006 at 18:06.
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Old 9th January 2006, 18:20   #4  |  Link
Nic
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Thanks

Don't know how I missed the whitepaper ( http://www.aud-x.com/images/stories/...whitepaper.pdf ). I did look for something of that nature but didn't spot it.

Good luck with your project

-Nic
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Old 9th January 2006, 18:44   #5  |  Link
Sirber
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That would be cool in BeSweet too, so GUI developers could use itin their own app.
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Old 9th January 2006, 19:00   #6  |  Link
3dsnar
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We will release some DLLs and info on how to use'em,
necessary for BeSweet and other apps.

I hope the project will gain interest among users, but also
among developers. If people really interested in including our codec
will contact us, we will provide the necessary tools
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Old 9th January 2006, 19:06   #7  |  Link
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Well, I wouldn't mind including your codec in RealAnime 4 (via beSweet)
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Old 9th January 2006, 19:11   #8  |  Link
3dsnar
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ok, ok, ok.
Please give us couple of weeks to recover.
The last 2 months was crazy
I will post some info when we will publish
the DLLsm
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Old 9th January 2006, 19:14   #9  |  Link
3dsnar
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BTW. If anyone can help in any way
to popularize the software, that would be ofcourse great!
(among users, movie coders, etc)
Any ideas or suggestions?
Please write your thoughts.
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Old 9th January 2006, 19:21   #10  |  Link
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besides the graphs of the computated difference of the Audio compressors, are there representative results from listening (ABX) tests?
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Old 9th January 2006, 19:25   #11  |  Link
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Unfortunately not. Such tests are time consuming and expensive,
thus I hope that users will test the codec by their own.
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Old 9th January 2006, 19:28   #12  |  Link
Sirber
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failed to register audxdshow.ax: error -2147024770

on XP SP2, AMD64 3000+, 1GB DDR400 DC.
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Old 9th January 2006, 19:29   #13  |  Link
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Wouldn't your codec be better using HE-AAC instead of MP3?
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Old 9th January 2006, 19:36   #14  |  Link
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Yeah. Bugs are possible... This is
first release. Please try to restart your computer
and install the codec again. If this will not help,
please let me know.
----------------------
AAC issue:
Well there are problems with AAC and AVI file container...
Although we might do that in the future, because the
technology can be based on any audio compression method
(including also Ogg Vorbis)
This are matters for the future
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Old 9th January 2006, 19:54   #15  |  Link
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Sorry I can't restart yet, I'm in the middle of an encoding I will let you know later.
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Old 9th January 2006, 20:42   #16  |  Link
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Quote:
Originally Posted by 3dsnar
Yeah. Bugs are possible... This is
first release. Please try to restart your computer
and install the codec again. If this will not help,
please let me know.
Restarted and reinstalling and same error.
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Old 9th January 2006, 23:15   #17  |  Link
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Quote:
Originally Posted by Sirber
Wouldn't your codec be better using HE-AAC instead of MP3?
Agreed

We could really do with some more 6Ch capable AAC-HE (and AAC-LC) encoders. Nero has been the driving force for far too long!


Cheers
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Old 9th January 2006, 23:26   #18  |  Link
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imagine... a 32kbps HE-AAC v2 + PS using their technology

5.1 at 32kbps
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Old 10th January 2006, 03:36   #19  |  Link
bobcat56458
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Just thought I’d make mention that the Xvid\DivX 5.1 audio encoding using Aud-X is not limited to DVD’s you have ripped. It also works with as an example a DV home movie that you’ve made a DD5.1 soundtrack for using ursmatl’s V.I stereo to 5.1 VST plugin for Plogue Bidule, and a DD5.1 encoder. This also works with a captured MPEG2 file you've made a DD5.1 soundtrack for. Thanks 3dsnar for your useful tool\codec.
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Old 10th January 2006, 04:26   #20  |  Link
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Quote:
Originally Posted by Sirber
imagine... a 32kbps HE-AAC v2 + PS using their technology

5.1 at 32kbps

You are greedy
anyway it is a great idea,i will thier codec at 80kbps and see.
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