[vorbis] MP3 to OGG conversion

[Brendan Ragan]

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Hello Robert,

Wednesday, June 26, 2002, 7:08:38 AM, you wrote:

RC> a .wav file is a digital format is it not? I'm no video/audio guru by
RC> any stretch so if I'm wrong on that point please correct me. But for
RC> this message I'm going to assume .wav is a digital format. .mp3 is a
RC> digital format as well right? Again I'm going to assume the same thing
RC> for the moment until corrected.

They may be both digital formats, but they are not both "full"
representations of the original audio file (not even getting into
weather CD's are infact "full" representations of the original audio
<grins>)

Mp3 (and Ogg Vorbis) are both 'Lossy' compression formats - they are
allowed to throw out information to reach the desired bitrate. The
reason that they (can) sound so good is that they throw out noise
"where we can't hear it"

Only lossless files (either 'losslessly' compressed or the original)
can be compressed with no loss of quality (other than, of course the
loss that is incurred by the codec)

RC> Given that these two are digital formats and from what I can gather from
RC> the archives there is very little quality loss converting from .wav to
RC> ogg at least from what I can see in the archives anyway.

which is what makes Ogg Vorbis so good <grins>

<p>Here's a question. (and someone may hit me with a cluebat as i really
don't have *any* idea how Vorbis compares to Mp3 on a low level)
Someone was recently commenting that bitrate peeling would require
some sort of re-quantizing. Is it possible to convert information
designed for mp3's filterbank to that of ogg's? or are the formats way
too fundamentally different? (There's still a rather large question i
suppose as to weather one should bother at all as one could just use
an mp3 player and not be subject to quality loss (due to transcoding) *at all* )

<p>- --
Best regards,
 Brendan                            mailto:reaper at post1.com

=====

"In a soul without a mind, in a body without a heart, i'm missing every part" - Massive Attack...

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<p><p>--- >8 ----
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