Xavier Bonjour wrote:
Hello,
And to add one more level of confusion, MPEG-H 3D Audio has gone for
ACN/N3D normalization!
Ah, I didn't read this before. Thanks!
Even if so, MPEG-H 3D Audio is not really an Ambisonics format in a
strict sense. (It is maybe a hybrid codec accepting different input
formats, and reproducing C/O and HOA on different speaker configurations
and via headphones.)
If MPEG-H 3D Audio uses ACN/N3D conventions, it is more an < internal
problem > for their HOA decoder(s) - and doesn't really matter to other
people.
AmbiX is a stand-alone format developped for HOA.
B format 1st order was not based on "FuMa conventions", it is obviously
the other way around. (Original convention and format for 1st order SF
recordings and mixes.)
Best regards,
Stefan
Going beyond 3rd order is also going for better quality and it makes
sense for the following reasons:
- Recording technologies make progress: we should expect multicapsules
microphone technology to improve and go beyond 3rd Order
- 3D sound can also be computer generated to any order and there is a
significant perceptual difference between the binaural rendering of 3rd
order content and content of higher orders. And this difference is even
bigger when HRTF are personalized
- Compression (MPEG-H 3D Audio, ...) will make HOA content manageable,
even on a smartphone.
I guess defining a normalization that covers HOA beyond 3rd order is about
getting the "format" ready for the future development.
Kind regards
-Xavier
-----Original Message-----
From: Sursound [mailto:[email protected]] On Behalf Of Albert
Leusink
Sent: dimanche 3 avril 2016 02:20
To: [email protected]
Subject: [Sursound] Ambisonics for Android and also Oculus..
Hello all,
Coming soon, to a phone near you !:
https://storage.googleapis.com/jump-inspector/Jump_Inspector_Quick_Start.p
df
There will definitely be many user complaints initially due to
misunderstandings as it uses ACN/SN3D ordering and 99% of all the tools
(VST plugins etc..) currently used by the VR community are FuMa / .AMB
based...
To add to that confusion, Oculus has just updated their Gear VR video
player specs to accept FuMa first order....
I'm sure you have all had this discussion many times over, but what, if
any, are the advantages of 1st order ACN over FuMa?
From what I've gathered, ACN was initially proposed as it would allow
bigger file sizes but I don't think that really applies to mobile phones
in this case...doesn't it only make sense to have ACN beyond 3rd order?
Have a good weekend,
Albert
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