[MPlayer-dev-eng] Re: [MP] [PATCH] "turbo" mode

[Guillaume POIRIER]

Hi,

Le jeu 16/09/2004 à 01:07, D Richard Felker III a écrit :
> of course qns degrades psnr, that's the whole point of noise shaping.
> :) it's a perceptual quality optimization, not a psnr optimization, so
> it's difficult to compare like this.
> 
> rich

Thanks for the enlightenment rich... what's quite surprising is that
Romain Dolbeau (you know, the altivec guy) wrote a genetic exploration
software to find what was the best combination of options (PSNR-wise)
for a given sample of video... and qns was shinning out!

Ok now, Could you maybe tell me if when the description of qns is:
"Quantizer noise shaping, reduces ringing artifacts" is it supposed to
reduce ringing artifacts of the source video (pre-filter), or of the 
target video (post-filter)?
I guess it's the target video, but that isn't very clear....

Regards,
Guillaume