[XviD-devel] Adaptive quantisation

[Michael Militzer]

Hi,

----- Original Message -----
From: "Dirk Knop" <dknop@gwdg.de>
To: <xvid-devel@xvid.org>
Sent: Sunday, August 04, 2002 6:16 PM
Subject: Re: [XviD-devel] Adaptive quantisation


> Hi again,
>
> the thread concerning this was here:
>
>
http://www.xvid.org/modules.php?op=modload&name=phpBB2&file=viewtopic&t=590&
highlight=luma+masking
>
> I hope this clears up the situation easier.

yes, but there's no note that the code had been really committed. Also
ProfDrMorph even states that good constants need to be found before
committing... - but that's not important anymore.

> I could do a "test build" with an edit box which edits this threshold.
> Let's see first if people can cope with it, I think it's too hard for
> them to get that right and if they fail, not to blame the codec. (Like
> in the new doom9-comparison, I could just give him some hints how to
> setup the codec correctly, but he failed. Since I don't have those DVDs
> I can't deliver optimized values [well, I lent the matrix now to see if
> those scenes aren't tweakable. I'm confident XviD can cope better with
> that.]. Too bad that he didn't mention that the "new" curve treatment
> improves the overall quality of an xvid-encode by a noticable amount.)
>

well, I don't know. Pretty much thresholds are needed. But I think I'll add
some additional code (activity masking), after I looked at the adapt quant
code again anyway, this needs no API change (flags). So you'll all get
something new to play with ;-)

btw: there's a new codec comparison? I didn't knew this too. From what you
said, we're not very good this time?

bye
Michael