"PlusV offers a method for compressing a part of the audio spectrum where MP3's own compression doesn't work particularly well. Combined with the excellent features of MP3, the new combined format called MP3+V can achieve incredibly small files while maintaining full compatibility with existing MP3 files. "

Even if i don't understand how it is licensed (they realese the sources...) i think it should be useful for OGG low bitrates too.

Any comment ?

A) It's patented, which immediately makes it utterly useless for Ogg.

B) Ogg doesn't suffer from the same kind of restrictions MP3 has, so the hacks to drag on MP3 a bit longer (MP3Pro, PlusV) aren't transferrable to it.

--
GCP

It's possible to use it under GPL term
http://www.vlsi.fi/plusv/patent-license.shtml

Vorbis has a free license (BSD), not a restricted one like the GPL.

if you are curious... try it
http://www.geocities.com/gameplaya_15143/downloads

i fixed the *broken* plusv.exe so the -h (help) option actually works... and changed a few things so it is actually useful as a proof-of-concept encoder (or maybe disproof-of-concept )

plusv -e input.wav 22khz.wav 44khz.pv

then encode 22khz.wav to your codec of choice (ie. vorbis). decode back to wav

plusv -d 22khzdecoded.wav 44khzdecoded.wav 44khz.pv

then listen to 44khzdecoded.wav and you can see how it sounds

ps. if you like crazy things... use 22khz.wav as input when encoding with plusv.exe
i removed the 32khz-or-higher-sample-rate limitation

enjoy happy testing

Vorbis has noise normalization. Garf pointed out too that PlusV is patented so it's of no use. I just don't understand what people don't get about this? ;-D. More time and energy would be better spent in developing a hybrid filterbank. This is just my take on the situation of course backwards compatibility becomes an issue. ;-D.