[Vorbis] OGG compression optimization

[Sevana Oy]

Thanks for joining the discussion. Yes, AQuA is "a yet another electronic 
ear", but it's not one of pre-existing algorithms, 100% new approach. All 
AQuA customers (that do exist in VoIP and telco) are not tied up with patent 
use and royalties.

The whole point is to automate the choice of <n> in the -q option. The post 
has some examples and we can deliver batch files for OGG or MP3 or AAC 
optimization together with AQuA software to put your own hands and eyes on 
the tool. We still find it useful when one can save up to 40-50% on file 
size preserving "the same" from perception point of view quality.

Thank you for your time and effort considering our approach!


----- Original Message ----- 
From: <xiphmont at xiph.org>
To: "Nikos Chantziaras" <realnc at arcor.de>
Cc: <vorbis at xiph.org>
Sent: Saturday, August 27, 2011 9:27 PM
Subject: Re: [Vorbis] OGG compression optimization


>> Well, it says that the method is patented, so that means it can't be 
>> used.
>
> No, that just means _we_ wouldn't be able to do anything with it :-)
> Don't put too much stock in patents-- you could patent yogurt assuming
> the internet was somehow involved. :-)
>
> I do have a criticism of what's being presented though; it is another
> 'electronic ear' algorithm, but unlike the others we have available,
> there seems to no information on what it's actually doing.  Electronic
> quality evaluation algorithms tend not to match up very well with
> actual human ears. If they did, the problem of compression would be
> much easier.  That's not even accounting for the issue of large
> individual variation in humans.
>
> In short, for anyone who cares enough to be interested in using a tool
> like this, the tool is not likely to be trustworthy enough to be
> useful.  Not to mention-- Vorbis already has psychoacoustic evaluation
> built in. That's the whole point of the quality-based modes.  -q <n>
> is supposed to produce identical quality for all inputs for any given
> <n>.
>
> Anyway, the writeup makes it sound very much like one of several
> preexisting algorithms with a new marketing strategy, aka, digital
> snake oil.  If that's not the case, Sevana, by all means do fill us in
> :-)
>
> Monty
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