[vorbis-dev] Interesting coding problem ..

[Robert Voigt]

I listened to the piece and found the atifacts. It sounds like an echo
with very short delay. First I thought it could really be a limitation
of vorbis, because in pure voices there's not much masking that can be
exploited for compression. But now I think it could be a bug. I haven't
tried encoding with postbeta2 yet. I'll do that and then I may have a go
and play with the psychoacoustics. That's all _I_ can do. Someone else
should look for a bug as well.
I don't think it will be solved in the next days. So why don't you just
write the wav on a CD and send it? That would solve your problem with
tranfering the file. But thank you for pointing the encoding problem
out.

Geoff Shang wrote:
> 
> Hi all:
> 
> I came across an artifact using vorbis 1.0beta2 which might be
> correctable.  I've put up a webpage with both OGG and MP3 files of the
> original source material.  Since the original wav is 42MB, I haven't put it
> there.  However, I have cut off the last minute or so where I think it's
> most noticeable, and will be putting that up
> there too, shortly.  I tried encoding from the MP3 file for the hell of it
> and detect very similar results, so if you'd rather do that then you can.

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