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Topic: News from xiph.org (Read 11459 times) previous topic - next topic
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News from xiph.org

Reply #25 –
Quote
xiphmont> Vorbis II is not intended to be compatable with Vorbis I

Does this mean anything encoded with ogg as we now know it will not be compatible with ogg2?

rs
Somebody has to do something, and it's just incredibly pathetic that it has to be us. Jerry Garcia-Grateful Dead

News from xiph.org

Reply #26 –
Quote
Here we go: No, I did not ABX this (arrgh, please don't beat me   ). I just encoded about a dozen tracks with both codecs and listened to them (the good old method, where you sit back and relax) and while simply enjoyed all the Vorbis encodes, there were some Nero tracks which made me feel a little uncomfortable. I know all you hardcore ABXers are rotating now, but for me the pleasure is more important than the scientific proof   .

Good for you, but if you want to post it on this board, you are expected to backup this claim with a sample and ABX results.

If you don't want to ABX this, then please refrain from making statements like that on this board. It doesn't help us at all.
Over thinking, over analyzing separates the body from the mind.

News from xiph.org

Reply #27 –
Quote from: rickshaw,Mar 1 2004, 08:09 PM
Quote
xiphmont> Vorbis II is not intended to be compatable with Vorbis I

Does this mean anything encoded with ogg as we now know it will not be compatible with ogg2?

rs

Apparently so.  But Vorbis II is still in the planning stage and that may or may not change.

News from xiph.org

Reply #28 –
Quote
I especially want to farm out the Ambisonics suport to our in-house surround nuts who have already been working with it for > a year.


this sounds good to MY ears  ambisonics is just too cool for school, and is finally picking up momentum.  as is vorbis.  combining the two could mean good things for both Vorbis and the surround world... imagine in 20 years time when the first DVD-A comes out, that it's encoded in b-format Vorbis

News from xiph.org

Reply #29 –
Back on topic:

Quote
- Monty wants to return to a monthly release circle for Ogg/Vorbis

Hmmm... will he try to catch up with the work that Garf, QuantumKnot and Aoyumi did in the meantime ?

I wonder about this: what will happen if Monty starts releasing regularly updates to Ogg Vorbis, and QuantumKnot and others also continue to work on it, from a different fork ? I don't think this will be a very efficient way of working on this. Some work will definately be duplicated, and some features or tunings may be added to one fork that may also be valuable to another one... It could get messy.

It would be better if Monty could work together with other contributors, or at least implement some of the tunings in the "official" Ogg Vorbis code.
Over thinking, over analyzing separates the body from the mind.

News from xiph.org

Reply #30 –
Quote
Back on topic:

Quote
- Monty wants to return to a monthly release circle for Ogg/Vorbis

Hmmm... will he try to catch up with the work that Garf, QuantumKnot and Aoyumi did in the meantime ?

I wonder about this: what will happen if Monty starts releasing regularly updates to Ogg Vorbis, and QuantumKnot and others also continue to work on it, from a different fork ? I don't think this will be a very efficient way of working on this. Some work will definately be duplicated, and some features or tunings may be added to one fork that may also be valuable to another one... It could get messy.

It would be better if Monty could work together with other contributors, or at least implement some of the tunings in the "official" Ogg Vorbis code.

These monthly releases will be mostly bugfixes and theoretically it takes little to no effort to port our changes into the official Vorbis.  For example, my base for tuning was the 20030909 version but to merge it into the latest 20031020 involved just a two file replacement and voila....

News from xiph.org

Reply #31 –
Quote
Apparently so.  But Vorbis II is still in the planning stage and that may or may not change.

Yes, but the basic goals for Vorbis2 seem very clear. 

1. Remove requirements that make hardware support difficult.
2. Channel coupling for surround sound.
3. Tuning and additions to help compete with AAC.

News from xiph.org

Reply #32 –
Somehow I got the feeling Monty was going to introduce 5.1 stereo coupling into Vorbis 1.1 since he did mention it was one of the top priorities along with true CBR (presumably for EVD acceptance).

News from xiph.org

Reply #33 –
Quote
Somehow I got the feeling Monty was going to introduce 5.1 stereo coupling into Vorbis 1.1 since he did mention it was one of the top priorities along with true CBR (presumably for EVD acceptance).

Yes I believe this is going to be added for 1.1.  Funny everyone at doom9 was screaming for this for literally 2 years for this and then EVD comes along and all of a sudden it is a priority.  Before then it wasn't even on the roadmap.  I can dig up a gigantic thread I think ~ 2002 in which doom9 forum members made a large database of 5.1 audio that would be useful to Monty for tuning.  It does make sense though, I mean since Theora is VP3 compatible codec it will play in a EVD player and vorbis audio seems like a shoein because of of patents etc.  If this indeed happens I would much rather buy a HD EVD player than a HD DVD w/ WMV9 .

News from xiph.org

Reply #34 –
Quote
I mean since Theora is VP3 compatible codec it will play in a EVD player and vorbis audio seems like a shoein because of of patents etc.

Theora is not compatible with VP3. You can losslessly transcode VP3 to Theora but not vice versa. A simple, plain VP3 decoder won't be able to decode Theora (perhaps it is possible to write a all-in-one decoder).

But this doesn't matter as EVD will use VP6 anyway IIRC (if they choose a ON2-codec).

News from xiph.org

Reply #35 –
Hmm, yes you are right.  I though the difference was just a few flags but it seems to be more than that.  A all in one decoder for Theora/VP3/VP6 certainly sounds feasible  I suppose.

News from xiph.org

Reply #36 –
Quote
Yes I believe this is going to be added for 1.1.  Funny everyone at doom9 was screaming for this for literally 2 years for this and then EVD comes along and all of a sudden it is a priority.  Before then it wasn't even on the roadmap.  I can dig up a gigantic thread I think ~ 2002 in which doom9 forum members made a large database of 5.1 audio that would be useful to Monty for tuning.

Do you have a URL of that gigantic thread of 5.1 audio sample handy?

From the latest Xiph meeting:

Quote
<rillian> we're still looking for uncompressed 5.1 soundtracks

News from xiph.org

Reply #37 –
Sure I can find it, but I don't know if the database is still intact.  Some users might have some of them, I suppose you could ask ChristianHJW he may still have all of them.  Anyhow http://forum.doom9.org/showthread.php?s=&threadid=22400 they certainly weren't uncompressed though as you will see all of them were transcoded from ac3.  If they are looking for more I could provide them with some samples transcoded from DTS but that is the best I can do ATM.
EDIT: I should say you will find no samples there, they were all uploaded to some other unknown location.  MaTTer or ChristianHJW will know what became of them probably.
 

News from xiph.org

Reply #38 –
Quote
<rillian> we're still looking for uncompressed 5.1 soundtracks

well if even this is a problem, than i doubt that we will get 5.1 in the next months :B
I know, that I know nothing (Socrates)