1st into 3rd

[e deleflie]

All,

What about decoding a 1st order ambisonic signal into speaker signals
... lets say 5 speaker horizontally, then encoding each of those as
point sources into a 3rd order signal.

What's the down side of doing that?

Etienne

[Oliver Thuns]

see "HOA as a production format" on sursound, mails from Michael
Chapman and Fons, June 16.

I guess you capture something in the higher degrees, if you decode to
an ITU-5.1 layout, but this is more a bug than a feature...

[Sampo Syreeni]

On 2009-07-07, Oliver Thuns wrote:

> I guess you capture something in the higher degrees, if you decode to
> an ITU-5.1 layout, but this is more a bug than a feature...

Yes, it is a bug, and no, I don't think it should happen. I mean, for
this sort of thing nothing but a naïve decode makes much sense, and I
think that in this case, the matching conditions preclude generation of
higher order components. Of course if you go overboard with optimization
and sacrifice either strict directional correspondence (as you e.g. do
in the first order case if you apply dominance, or what happens when you
numerically optimize for a higher order decode while allowing some
directional distortion in exchange for higher rE) between the two signal
sets, this no longer holds.
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
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