[vorbis-dev] Higher bitrates

Gregory Maxwell greg at linuxpower.cx
Mon Jul 24 04:44:31 PDT 2000



On Sun, 23 Jul 2000, Kenneth C. Arnold wrote:

> Look for the Ogg Squish codec (Monty?). I've seen some others -- can't recall
> the names right now.

I believe the RK archiver currently exceeds Squish. :)
 
> I thought you needed new books for these to work -- but anyway, he's concerned
> with compiled encoders, not messing around with the source. Could some people
> in the know (e.g., Monty?) please get the other bitrates up and running? I can
> then have support for this available immediately in Vorbize, as it would only
> involve uncommenting a small block of code.

There are options that work without changing the books, you can turn off
some of the more optimistic psychoacoustics and change some
thresholds. Generating books isn't that hard either, but it's not
documented and you have to have an understanding of the codec. 

Frankly, I don't really think that there is a need for higher bitrates
currently. 

The ratio of people mentioning perceptual quality problems vs the people
asking for high bitrates says to me that instead of needing actual higher
bitrates because of quality problems, people are asking for them for
comfort factor. Many people would rather be running a lossless codec, and
if thats what they want, then thats what they should use. 

320Kb/s is getting close to what you can achieve losslessly. If more
people were to help finalize Vorbis (i.e. by listening tests) then Monty
could get back to working on Squish.

It's not going to do Vorbis any good to just pump the bitrates. :)

That said, it's really up to Monty as he's the main developer. I'm just a
cheerleader.

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