[ogg-dev] OggPCM proposal feedback

John Koleszar jkoleszar at on2.com
Thu Nov 10 06:15:11 PST 2005

I threw a rough draft of an alternative format incorporating the 
comments received so far in this discussion on the wiki:

This seems to me like it would support the ambisonic requirements you 
mention, though it doesn't (and I imagine won't) describe the mic 
locations. Somebody who actually uses that info could probably define 
extra header pages for a later version of this spec. I hadn't even heard 
of ambisonics until your post, to be honest.


oliver oli wrote:

> Erik de Castro Lopo wrote:
>>   f) Encoding of channel information. In a two channel file,
>>      is the audio data a stereo image or two distinct mono
>>      channels? For a file with N (> 2) channels, are there      pairs 
>> of channels which should be considered as a stereo
>>      pairs or do you want to place these stereo pairs as      
>> separate streams within a single ogg container? What
>>      about multi channel surround sound (there are a number
>>      of different formats like 5.1 and 7.1) or quadraphonic?      How 
>> are you going to specify which channel is which.      Being able to 
>> encode this stuff easily is **vital**.
> please don't forget ambisonics :-)
> 2 channel UHJ
> 4 channel 1st order
> 9 channel 2nd order
> 16 channel 3rd order
> etc.
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