[vorbis] AC-3 Decoding
marco at simplex.nl
Wed Aug 8 05:38:07 PDT 2001
On Wednesday 08 August 2001 13:57, you wrote:
> 1. It is only 2D, space is 3D , remember ? :-)
> 2. It is "hardwired" to a particular speaker setup -> lack of flexibility
> and scalability 3. Has less direction precision as Ambisonic ( the "thing"
> that will be used by ogg/vorbis for spatial sound ) , but I am not 100%
> sure about this, some of the gurus should confirm ( or deny )
When I hear 3D support I tend to think about allowing the protocol to specify
an exact 3D position for each channel in the file, which can then be
_optimally_ mapped to a given setup client side.
Ambisonics is a way to pre-encode positions into a 4 channel format, but it
will allways loose some precision. Ambisonics could simply be supported by 4
channel support and seperate post processing, the only thing vorbis would
really need in this respect is a flag in the header to indicate its an
ambisonic recording and perhaps a special mode to make best use of the
correlation between the channels ala the proposed joint stereo encoding.
--- >8 ----
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