[vorbis-dev] Updated Vorbis RTP I-D

[rillian]

On Friday, December 20, 2002, at 11:56  pm, Monty wrote:

> www.ambisonic.net full surround spherical wavefront encoding in four
> channels (for first order representation).  It boasts better real
> sound localization than 5.1, does not require strict speaker
> placement, and uses fewer channels.  At the time of its original
> introduction in the 70s, practical ambisonic decoders couldn't easily
> be made from analog electronics in anyone's price range and the format
> disappeared.  In this era of cheap, fast DSP, decoding complexity is
> no longer an issue.

I've never experimented with a real setup, but I'd guess this 
description is a little optimistic. Certainly the encoding makes more 
efficient use of the available channels, but I assume one would need at 
least one higher order harmonic (n=2) to achieve the same front-side 
localization at 5.1. So it doesn't really use fewer channels.

So, I'd say rather that it's a more flexible, logical and efficient 
encoding and much more appropriate in non-film applications where you 
don't have a single dominant orientation.

  -r

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