[vorbis] Ogg artifacts

[Jürgen]

Thursday, January 22, 2004, 10:57:13 PM, schrieb:

> I'm having some difficulty getting into Ogg. Being my first time encoding to
> Ogg, I am left doubtful of the quality in reproduction. Hopefully, it is
> merely something that I am doing.

> My original intentions were to go through my CD collection and rip
> everything out at 224kps VBR. I began with an album I was relatively
> familiar with. I used FreeRip 2.53 initially, but found that I had
> artifacts (clipping) in a couple places in a couple songs. Being suspicious
> of the binaries being used, I switched over to tkcOggRipper and re-ripped
> the album using the same settings (considerably faster rip for some
> reason). Problem still existed, though less prominant. I now focused in on
> one song.

> What I got was a cleaner version of the file, but some artifacts still
> existed (2 to be specific). I listened to the cd itself and found that
> there was a hint of one of the artifacts in one position, but none that I
> could hear in the other position. The CD I was ripping off of actually
> happens to be a copy since my original CD became too scratched to use after
> an unfortunate incident. Coincidentally, I do not know how good the
> original CD was that this was taken from. Anyhow, I took that same song
> again and ripped it using LAME 3.93.1 and EAC. EAC gives a track quality
> report and on the track I kept trying to rip it reported 99.4% integrity,
> however the end result is a perfectly encoded MP3 with no artifacts.

> I used a different CD as a test platform, one that was near flawless, and I
> have yet to detect any artifacts created. But being that ripping from
> imperfect CDs is a fact of life, does this hinder Oggs application? Does
> Ogg properly handle artifacts in the source, contrary to what I'm seeing? I
> can understand clipping coming across when the source has difficulty
> reading the song, but it is actually amplifying the artifact when LAME
> doesn't even produce it. Is this normal to have artifacts compounded
> through Ogg, but hidden through LAME? What does one do when they have an
> imperfect CD that plays near perfectly but does not rip to Ogg near
> perfectly?

> -Jon
> Ah, lamently, no. My gastronomic capacity knows no satiety.

<p><p>--- >>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.

  maybe you should try some kind of accurate ripper like EAC
  www.exactaudiocopy.de or CDex www.sf.net/projects/cdexos and which
  settings did you use? qX?

  

<p>
-- 

 Jürgen                            mailto:juergen.br at gmx.at

--- >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.