[x264-devel] PSNR vs the distance of reference frame

[Loren Merritt]

On Tue, 29 Jun 2010, Dylan Klebesadel wrote:

> The reason for the increace in PSNR is the P.
> Think of what the P stands for.
>
> Peak Signal to Noise Ratio
> Average Signal to Noise Ratio

You're parsing it wrong.
It's "((peak signal) to noise) ratio" not "peak ((signal to noise) ratio)".
I.e. "peak" just means you normalize by the maximum value of a pixel. It's 
still an average.

--Loren Merritt