[vorbis-dev] Multichannel Encoding
tme at 21rst-century.com
Tue Jan 23 12:33:46 PST 2001
"Richard W.E. Furse" wrote:
> I'm a mathematician and programmer working on experimental surround sound
> techniques. Some of the ideas I'm working on require dozens of channels.
> These channels are often highly correlated and are very well suited to
> I'm new to Vorbis. Does it attempt to address such issues?
I believe that the current goal is to implement ambisonics. From August
> Ralph Giles wrote:
> > On Mon, 14 Aug 2000, Jean-Marc Valin wrote:
> > > I saw from the interview on Slashdot that there is no support for channel
> > > coupling in Vorbis. I would like to help work on that. Has anything been started
> > > about that? I don't know yet whether if could work "in real life", but I have
> > > started to work on a way to do adaptative coupling between two channels (by
> > > finding the best transformation to predict one channel from the other).
> > As I understand it, the plan is to implement joint stereo and surround at
> > the same time, based on ambisonic encoding. You should check the list
> > archives, but there hasn't been much discussion; I've no idea what Monty
> > intends as far as compression of the channels.
> > David Carter's original proposal is at:
> > http://www.xiph.org/archives/vorbis-dev/0844.html
> > And there's some good background at the ambisonics website:
> > http://ambisonic.net/
> > > I would like to know whether I can be useful. I have some experience in audio
> > > processing/coding (mostly speech).
> > Hope that helps,
> > -ralph
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