[vorbis] CVS RC4 -q0 too good!

[Mark Hetherington]

Yes, I see a problem with starting 0 at 64, since it makes it hard to go 
lower. 0 should be rock bottom I think, or it should be possible to go 
negative, so that it is easier to get lower bitrate modes.

The maximum bitrate is 500 isn't it?
Mark

On Thu, 4 Jul 2002 15:32, Ross Levis wrote:
> May I suggest that the up coming RC4 or 1.0 needs some quality selection
> adjustments.  It has been said that if you are happy now with a
> particular quality setting, later releases will produce the same quality
> but reduce the average bitrate.  This is not currently the case.  IMHO
> -q4 in CVS is producing almost perfect results and features audio
> frequencies up to 21khz -- almost CD quality.  In my opinion -q1
> (80kb/s) is producing results similar or better than mp3 at 128.
>
> Why not reduce the nominal bitrate down a couple of steps.  Of course
> some additional tuning will be required.
> q 0.0 = 48kb/s (13khz lowpass)
> q 1.0 = 56     (14khz)
> q 2.0 = 64     (15khz)
> q 2.5 = 72
> q 3.0 = 80
> q 4.0 = 96 (default)
> q 5.0 = 112
> q 6.0 = 128
> q 7.0 = 160
> q 8.0 = 192
> q 9.0 = 256
> q 10  = 320
>
> This is still assuming 44.1khz sampling.  I presume 22khz has it's own
> table of quality/nominal bitrates.
>
> Just thinking out loud.
>
> Good work Monty.
>
> Ross Levis.
> http://winvorbis.stationplaylist.com
>
>
>
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