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Topic: Future of Vorbis - any infos? (Read 4384 times) previous topic - next topic
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Future of Vorbis - any infos?

Will there be any Ogg Vorbis II ? If yes - when? Who will make this? It will be just heavily tuned Vorbis I or something really new? What Xiph.org do now?

Future of Vorbis - any infos?

Reply #1 –
Afaik nothing is done nor planned for Vorbis II. Still so much that can be done with Vorbis I...

Future of Vorbis - any infos?

Reply #2 –
Quote
Afaik nothing is done nor planned for Vorbis II. Still so much that can be done with Vorbis I...

Yeah, and noone want to do something (or don`t have time...). I wonder where are guys from Xiph.org?

Future of Vorbis - any infos?

Reply #3 –
So garf does nothing 
I know, that I know nothing (Socrates)

Future of Vorbis - any infos?

Reply #4 –
Quote
I wonder where are guys from Xiph.org?

Working on the Neuros port and software, and Ambisoncs (multichannel) support.

Future of Vorbis - any infos?

Reply #5 –
LOL

This is the story about three famous people, named Someone, Everyone and No One. There was an important job to be done, and Everyone was sure, that Someone would do it. Everyone could have offered to do it, but No One did it. Now Someone got mad, because it was Everyones job. Everyone thought that Someone would do it, but No One realized that Everyone was lazy. Ultimately, Everyone bashed Someone, because No One did, what Everyone should have done...

Future of Vorbis - any infos?

Reply #6 –
Am I dumb in thinking Vorbis II would be the wavelet based codec?
< w o g o n e . c o m / l o l >

Future of Vorbis - any infos?

Reply #7 –
Quote
Am I dumb in thinking Vorbis II would be the wavelet based codec?

Well, if you're reading the other threads in this forum, then no.

Supposedly in the Vorbis specs (according to QuantumKnot), Vorbis II will be wavelet based. However, since I don't understand signal processing very well, I haven't looked at it to verify this information.

That said, it seems to be VERY low priority, and I don't blame Xiph for not trying very hard.  I suspect that wavelet-based algorithms do not degrade very well (or I could be talking out my ass).  MPC sounds like crap at low bitrates, compared to Vorbis, and it's closer to wavelet than Vorbis (or so I was lead to believe)

I also suspect that Xiph is more interested in good quality at low bitrates than better high bitrates  .  Hence the reason why GTb3 was written by Garf and not Xiph.org



Dammit, now I'm rethinking my choice with encoding my CDs in MPC -q 5, especially since I could have sworn I heard some artifacts last night in one of them. 

Future of Vorbis - any infos?

Reply #8 –
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since I could have sworn I heard some artifacts last night in one of them. 

dont think, abx 

regards; ilikedirt

Future of Vorbis - any infos?

Reply #9 –
Quote
Supposedly in the Vorbis specs (according to QuantumKnot), Vorbis II will be wavelet based. However, since I don't understand signal processing very well, I haven't looked at it to verify this information.

Actually I just went and read the Vorbis specs again and what I said may have been a bit misleading.  It would appear that Vorbis II is not wholly based on wavelets.

http://www.xiph.org/ogg/vorbis/doc/vorbis-...spec-intro.html (Look in the classification section)

It says that the codec of Vorbis I is designed such that it will 

Quote
...allow addition of a hybrid wavelet filterbank in Vorbis II to offer better transient response and reproduction using a transform better suited to localized time events.


So it sounds like there will be a combination of MDCT and wavelet coding, where wavelets will be used to improve transient response.  I should point out that Fourier-based transform coding is in fact a special case of subband coding, so the term 'transform' is a bit of a misnomer as we also have 'wavelet transforms'.  So I'll add the prefix 'Fourier-based' or 'MDCT-based' to be more specific.

Future of Vorbis - any infos?

Reply #10 –
@Garf

Could you explain a little the principle of that multichannel Vorbis support? Will it be compatible with Ambisonics formats, something like B-format or G-format or DVD-Audio(MLP)? And what will be the relation to DVD's AC3 5.1 formats. Will it be convertable somehow?
I read a litle about it here and here but I'm confused at that topic.

Regards
Lobuz