Re: [Sursound] Integrating binaural recordings into ambisonics

[Politis Archontis]

Hi Jamie,

I’m not sure the transaural to B-format approach would work as, if I understand 
correctly, the cross-talk cancelation filters equalize the direct paths and 
minimize the cross-talk paths
at two control points that are spaced apart (the ears). I’m not sure how you 
would capture that information with coincident recording?

One approach that could work is a parametric approach DirAC-like, but that 
would require quite some work. For that you need an estimate of diffuseness 
(based on the interaural coherence) and an estimate of the direciton of arrival 
(based on estimated interaural time and level differences). Then you could 
re-encode you binaural signals to B-format based on these parameters.

There are quite a few details missing from the above description but I think 
it’s possible, even though it needs a careful implementation and some 
experimentation.
You can also check some quite ahead of its time work from Julia Jakka in her 
master’s thesis here in Aalto university:

http://lib.tkk.fi/Dipl/2005/urn007903.pdf

Best regards,
Archontis


On 11 May 2016, at 21:10, Jamie Smith 
> wrote:

Hello all,
new subscriber here, so apologies if this topic has already been discussed.

Can anyone offer a way of successfully integrating a recording that
has been made binauraly into an ambisonic project?  The end product
would be delivered on headphones but, critically, must allow for head
tracking.  Clearly the two methods have compatibility issues.

As a work-around I have considered this:
binaural recording - pass through transaural processor (or similar) -
send to 2 virtual speakers - encode into b-format - listen on
headphones via ambi explorer or some VR player.

It seems convoluted and likely to degrade the spatial and spectral information.

Any thoughts?


Jamie Smith
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[Sursound] Integrating binaural recordings into ambisonics

[Jamie Smith]

Hello all,
new subscriber here, so apologies if this topic has already been discussed.

Can anyone offer a way of successfully integrating a recording that
has been made binauraly into an ambisonic project?  The end product
would be delivered on headphones but, critically, must allow for head
tracking.  Clearly the two methods have compatibility issues.

As a work-around I have considered this:
binaural recording - pass through transaural processor (or similar) -
send to 2 virtual speakers - encode into b-format - listen on
headphones via ambi explorer or some VR player.

It seems convoluted and likely to degrade the spatial and spectral information.

Any thoughts?


Jamie Smith
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.