[vorbis] Lossless/lossy hybrid?

[Aleksandar Dovnikovic]

"Josh Coalson" <j_coalson at yahoo.com> wrote:

> I replied on that board how the method he is proposing just injects
> quantization noise, and that a good perceptual codec should sound
> less noisy at the same bitrate, and that Shorten already does this
> and I don't know that people use it.

Yes it would probably sound more noisy then a perceptual codec,
but then the question is - what is more audible, the added noise or
the missing parts that were thrown away by a perceptual codec?
Since some people can distinguish between 320kbps LAME and
original wav maybe this kind of lossless/lossy encoder could
sound better.

> People are making pretty wild claims about quality there but it has
> a religious sound to it.  I guess if you are less sensitive to noise
> than other kinds of artifacts (like pre-echo) maybe it could be
> better.

I think that pre-echo shouldn't be a problem when you consider
the bitrates (>300kbps). OK, MP3 isn't very good when dealing
with pre-echo (short blocks are not short enough), but I think that
Ogg Vorbis should be pre-echo-free at very high bitrates (>300kbps)
- currently there are still some problems with pre-echo using -b350
mode, but I think this will be fixed in the future...


---
Aleksandar @ Vorbis Xtreme | http://solair.eunet.yu/~aldov
Ogg Vorbis is the free, open source alternative to MP3

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