[vorbis] bitrtate peeling and lossless compression

[Myles Buckley]

>-----Original Message-----
>From: Larry Fenske [mailto:lfenske at yahoo.com]
>Sent: Thursday, March 22, 2001 13:19
>To: vorbis at xiph.org
>Subject: Re: [vorbis] bitrtate peeling and lossless compression
><lossless discussion .snipped>
>
>Now I've heard both that lossless is possible and that it's not.  It would
be
>wonderful if it were possible.  I could peel back depending on the device I
>want to play on, and still be able to re-create the original in a year or
ten
>to re-encode with the (by then) new and improved vorbis.  Now, I'm saving
both
>the original wave file and the ogg or mp3 file.  I've hesitated re-encoding
all
>my waves into ogg because it's still undergoing rapid improvement.  If I
could
>encode into ogg, throw away the wave (even if some oggs are slightly
larger),
>then re-encode later I would be ecstatic (as far as digital audio goes
anyway).
>
>Larry Fenske

If you want truly lossless compression then look at (in alphabetical order)
LPAC - http://www-ft.ee.tu-berlin.de/~liebchen/lpac.html, Monkey Audio - 
http://www.monkeysaudio.com/index.html, RK Audio - 
http://rksoft.virtualave.net/rkau.html or Squish - we all know where to find
this one.

These will allow you to get the EXACT input file at a later time.  AFAIK, 
there is no method of 'peeling' any of these.

Myles Buckley

--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'vorbis-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.