[vorbis-dev] cascading Ogg Vorbis encoded audio

[Ciaran Anscomb]

Rob Burke wrote:
> 
> By cascading, I meant the following:
> 16 bit/44.1/PCM -> Vorbis 160 kbps -> Vorbis 128 kbps -> (insert codec
> of choice) and so on, perhaps up to 20 different encode stages.  [...]
> But the end goal remains to try and figure out a universal way to make
> audio codecs less prone to aural artifacts due to multiple encoding
> generations without adding any overhead.

You might be interested in the work of the BBC, et al producing the
ATLANTIC MOLE.  I don't know how specific to MPEG the work was, but
they tackled this problem (and the similar one of video degradation from
multiple encode steps) a long time ago...

http://www.bbc.co.uk/atlantic/
http://www.bbc.co.uk/atlantic/169audio/169aud.htm

(NB: I also have no idea whether patents, etc. are involved here.  It
might turn out to be completely useless due to them...)

..ciaran

-- 
Ciaran Anscomb, Perl/C Hacker
No disclaimer?  http://www.goldmark.org/jeff/stupid-disclaimers/
Be safe -- Be suspicious.   Regret nothing -- Report everything.
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