[ogg-dev] OggPCM format description, rev 3

Erik de Castro Lopo mle+xiph at mega-nerd.com
Mon Nov 14 08:08:04 PST 2005

Rene Herman wrote:

> As an interested bystander, I see that this proposal still has only one 
> format and one rate field for possibly many channels. Earlier someone 
> made the point that you might want to store main and side/back channels 
> with different width and/or rate. Using different logical streams was 
> suggested as an alternative, but has that been discussed enough?
> Still only as that interested bystander, I expect different rates to 
> probably be a pain (what's a frame?) but per-channel format sounded 
> fairly straightforward.

The only sensible way to do this is to have the more than one logical
stream with all channels in the same stream having the same sample

> Another point made was that of encoding channel information. Ie, are N 
> channels N mono channels, are some pairs to be considered stereo-pairs, 
> some M-tuples to be considered <M-phonic> pairs?

See  http://wiki.xiph.org/index.php/OggPCM2

  Erik de Castro Lopo
"Men never do evil so completely and cheerfully as when they do it
from religious conviction."  -- Blaise Pascal, mathematician, 1670

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