[vorbis] Vorbis determined to be as good as MPC at 128 kbps!

[Stephen So]

QKTune was my attempt to extend Garf's tunings down the quality range 
(2, 3, 4, 5) so that we get decent pre-echo handling.  The obvious side 
effect is a large jump in bitrate which I'm not too pleased about.  For 
music that doesn't have many frequent sharp attacks, this bitrate 
inflation may not be too much of an issue.  But on some tracks (eg. 
techno), even at q 2, the bitrate jumps to over 200 kbps in some 
places.  For someone using this on a portable with limited bitrate range 
(eg. some iRivers), this is a problem.

If iTunes AAC can encode castanets with much less pre-echo at ABR 128 
kbps, then hopefully there will be an imaginative (and non-patented) way 
of doing this in Vorbis without the bitrate inflation of GTune and QKTune.

owner-vorbis at xiph.org wrote:

> Oscar Sundbom wrote:
>
>> On Tue, 25 May 2004 11:16:22 +1000
>> Michael Smith <msmith at xiph.org> wrote:
>>
>>
>>> This is very unfair. We welcome third-party development of new and 
>>> better encoders - but in many cases we'll (eventually) fold changes 
>>> back in. Whilst it's true that as the 'reference encoder' _speed_ 
>>> (in terms of things like highly platform-specific optimisations) 
>>> isn't a real goal, high quality is. 
>>
>>
>>
>> This is something I'd very much like to see. Some sort of meeting 
>> point set up
>> for 3rd party developers to bring their tunings, exchange experience 
>> and then,
>> when tunings have been tested, work on folding it back into the 
>> mainline code.
>>
>> For example, we have got Garf's tunings for q>=6 and aoTuV (sp?) 
>> tunings for
>> q<=4. If work is done to merge those, we would have improvements over 
>> (almost)
>> all of the quality scale.
>
>
> Don't forget QKTune which is targetting mainly on the pre-echo 
> handling done for q 2, 3, 4, and 5 
> (http://www.hydrogenaudio.org/show.php/showtopic/17950).
> At least among the Hydrogenaudio users this appears to become an 
> acceptable tuning if it comes to audio quality as well.
> Attempts to combine aoTuV and QKTune are being done as we speak 
> (http://www.hydrogenaudio.org/show.php/showtopic/21183).
>
> Age
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