[vorbis-dev] Multichannel Encoding

[Rob Fletcher]

On Tue, 23 Jan 2001, Richard W.E. Furse wrote:

> Ahhhh, there's my "welcome to the list" message... ;-)
> 
> The quick answer is "yes, but not as much as I'd like" - which is a large 
> part of why I'm here. I don't actually know too much about MP3 - I've read 
> a few books but never got my hands dirty. As I understand it, less 
> directional information is stored in frequency bands in which direction 
> perception is weakest. I'm not quite clear about that and have less of a 
> clue about what happens for upper frequencies. Please would you explain?
> 
> I do have some ideas that I find quite exciting about ways to combine the 
> MDCT with Ambisonics, but I've not done the maths formally enough to know 
> that they will work - but now you know where I'm coming from! Do you know 
> if this kind of approach has been investigated?

Richard,

Do check out the York Ambisonics pages. Lots of info. We will be helping
on this effort when a good starting point (in time and dev wrt the
mainstream vorbis dev) has been set.

Yes, higher level, multichannel is of course in mind, not simply 4 channel
etc stuff.

http://www.york.ac.uk/inst/mustech/3d_audio/ambison.htm

Hope this helps.

Rob.

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