[XviD-devel] R-D "optimal"
Marco Al
marco at simplex.nl
Wed May 7 21:22:29 CEST 2003
From: "Christoph Lampert"
> You mean perform inverse DCT and calculate error in the image domain?
> I guess only performance penalties stop us from that.
I think he is saying the present error for an individual coefficient is
taken as the difference between the unchanged quantized coefficient and the
lowered/tresholded quantized coefficient ... whereas it should be between
the original coefficient and the dequantized lowered/thresholded quantized
coefficient.
Anyway ... as you said before, for MSE the DCT remains orthogonal.
Marco
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