OGG and Losslessness (Re: MP3 to OGG converter? (Was: Re: Xmms an d RH8))

[Bill Warner]

from the document that you provided I think this is more of a lossless
compression only between the stereo channels.  Rather than throwing out
stereo samples that it would normally deem unnecessary it would keep
them.  The over all sound sample is still lossy.

Although I don't know much about ogg, and that is just my interpretation
of the doc you sent to the list.

Bill W

On Thu, 2002-10-17 at 19:33, Derek Neighbors wrote:
> While I agree with your assessment, I think the statement "both formats
> are lossy" is incorrect.  OggVorbis supports lossless compression. (or
> at least that is my understanding as of v1.0)
> 
> >From the documentation:
> http://www.xiph.org/ogg/vorbis/doc/stereo.html
> 
> ======
> Lossless Stereo
> Using polar mapping and/or channel interleaving, it's possible to couple
> Vorbis channels losslessly, that is, construct a stereo coupling
> encoding that both saves space but also decodes bit-identically to dual
> stereo. OggEnc 1.0 and later uses this mode in all high-bitrate
> encoding.
> 
> Overall, this stereo mode is overkill; however, it offers a safe
> alternative to users concerned about the slightest possible degradation
> to the stereo image or archival quality audio.
> =======
> 
> 
> On Thu, 2002-10-17 at 10:50, David Mandala wrote:
> > Since both formats are lossy you would not want to go from mp3 to ogg.
> > You would want ot start with the original CD's and recompress them into
> > ogg format. Going from mp3 to ogg will sound really bad.
> > 
> > Cheers,
> > 
> > Davidm
> > 
> > On Thu, 2002-10-17 at 10:17, Alan Dayley wrote:
> > > At 09:35 AM 10/17/02 -0700, you wrote:
> > > >-<clip>-
> > > >The right answer is not 'download the xmms-mpg123' rpm.  The right
> > > >answer is use .ogg format instead.  Demand it from those whom you trade
> > > >music with.  So that mp3 will go away. ;)
> > > >
> > > >I say this because there may come a day in which you wont be able to
> > > >freely download xmms-mpg123 either.  It is better to free your self from
> > > >the mp3 patent now, instead of when its too late. ;)
> > > >
> > > >--
> > > >Derek Neighbors
> > > 
> > > Good point.  Follow-up question then is: Is there a utility for easily 
> > > converting MP3 to OGG?  Something script-able would be great.  Point it at 
> > > a directory and say convert.
> > > 
> > > Alan
> > > 
> > > 
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> > David IS Mandala
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> -- 
> Derek Neighbors
> GNU Enterprise
> http://www.gnuenterprise.org
> derek@gnue.org
> 
> Was I helpful?  Let others know:
>  http://svcs.affero.net/rm.php?r=dneighbo
-- 
Bill Warner
Unix/Linux Admin.
Direct Alliance Corporation

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